Instruction manual
Temperature Controller
KT7
To prevent accidents arising from the misuse of this controller, please ensure the operator using it
receives this manual.
SAFETY PRECAUTIONS
Be sure to read these precautions before using our products.
The safety precautions are classified into categories: “Warning” and “Caution”.
Warning
: Procedures which may lead to dangerous conditions and cause death or serious injury,
if not
carried out properly.
Caution : Procedures which may lead to dangerous conditions and cause superficial to medium injury
or physical damage or may degrade or damage the product, if not carried out properly.
Warning
• When using this controller on occasions which serious injury would be expected to occur or when damage
is likely to expand or proliferate, make sure to take safety measures such as installing double safety
structures.
• Do not use this controller in an environment with flammable gases, or it may cause explosion.
Caution
• Fasten the electric wire with the terminal screws securely. Imperfect connection may cause abnormal
heating or fumes.
• Use this controller according to the rating and environmental conditions. Otherwise abnormal heating or
fumes may occur.
• Do not touch the terminals while the power is supplied to the controller, as this may cause electric shock.
• Do not disassemble or modify the controller, as this may cause electric shock or fumes.
Caution
• This instrument should be used according to the specifications described in this manual.
If it is not used according to the specifications, it may malfunction or cause fire.
• Be sure to follow the warnings, cautions and notice. If not, it could cause serious injury or accidents.
• The contents of this instruction manual are subject to change without notice.
• This instrument is designed to be installed in a control panel. If not, measures must be taken to ensure
that the operator cannot touch power terminals or other high voltage sections.
• Be sure to turn the power supplied to the instrument OFF before cleaning this instrument.
• Use a soft, dry cloth when cleaning the instrument.
(If paint thinner is used, it might deform or tarnish the unit.)
• As the display section is vulnerable, do not strike or scratch it with a hard object.
• Any unauthorized transfer or copying of this document, in part or in whole, is prohibited.
• Tatsuno Matsushita Electric Works, Ltd. is not liable for any damages or secondary damages incurred as
a result of using this product, including any indirect damages.
1. Model number
1.1 Explanation of model number
A K T 7
1
1 0
(1) (2) (3) (4)
(5)
(1) Supply voltage ---------------------- 1: 100 to 240V AC, 2: 24V AC/DC
(2) Input type ----------------------------- 1: Multi-input (Thermocouple, RTD, DC current and DC voltage
can be selected by key operation)
(3) Control output (OUT) -------------- 1: Relay contact, 2: Non-contact voltage, 3: DC current
(4) Alarm output ------------------------- 1: Alarm output (1 point)
(The alarm action and Energized /Deenergized can be selected
by key operation)
(5) Heater burnout alarm ------------0: Not available, 1: Available (5A), 2: Available (10A), 3:
Available
(20A), 4: Available (50A)
(Heater burnout alarm is not available for the DC current output)
1.2 How to indicate the rated label
The rated label is put on the case.
When Heater burnout alarm is added, CT rated current is written in the bracket.
(e.g.)
(1)
AKT7111100
Supply voltage: 100 to 240V AC
Multi-input
Relay contact output
Alarm output (1 point)
(2)
Heater burnout alarm is not added
No.
(1) Model number, supply voltage, input type, output type, etc. are entered.
(2) Lot number is entered.
2. Name and functions of the sections
(1) EVT indicator
A red LED lights up when Event output [Alarm, Loop break alarm
or Heater burnout alarm (Option)] is ON.
(2) OUT indicator
When OUT output is ON, a green LED lights up.
For DC current output type, this blinks corresponding to the output
manipulated variable.
(3) AT indicator
A yellow LED blinks while PID auto-tuning is being performed.
(4) PV display
Indicates the input value (PV) with a Red LED.
(5) SV display
Indicates the setting value (SV) with a Green LED.
(6) Increase key
Increases the numeric value.
(7) Decrease key
Decreases the numeric value.
(8) Mode key
Selects the setting mode or registers the setting value.
(By pressing the Mode key, the setting value can be registered)
(9) Sub mode key
Brings up Auxiliary function setting mode 2 with the Mode key.
(1)
(2)
(3)
(4)
(5)
(6)
(8)
(7)
(9)
(Fig. 2-1)
Notice
When setting the specifications and functions of this controller, connect the terminals 1 and 2 for power
source first, then set them referring to “5. Setup” before performing “3. Mounting to control panel” and
“4. Wiring connection”.
3. Mounting to control panel
3.1 Site selection
This instrument is intended to be used under the following environmental conditions
(IEC61010-1): Overvoltage category , Pollution degree 2
Mount the controller in a place with:
• A minimum of dust, and an absence of corrosive gases
• No flammable, explosive gasses
• Few mechanical vibrations or shocks
• No exposure to direct sunlight, an ambient temperature of 0 to 50
(32 to 122 )
that does not change rapidly
• An ambient non-condensing humidity of 35 to 85%RH
• No large capacity electromagnetic switches or cables through which large current is flowing
• No water, oil or chemicals or where the vapors of these substances can come into direct
contact with the controller
75
3.2 External dimension
97
22.5
100
(Fig. 3.2-1)
3.3 CT (Current transformer) external dimension
AKT4815 (for 20A)
AKT4816 (for 50A)
(Fig. 3.3-1)
3.4 Mounting to DIN rail
Caution
Mount the DIN rail horizontally.
When DIN rail is mounted vertically, be sure to use commercially available fastening plates at the end of
KT7 series. Mount the KT7 series to the DIN rail so that the KT7 series cannot move.
However, if the DIN rail is mounted horizontally in a position susceptible to vibration or shock, the
fastening plates must be used as well.
Recommended fastening plate
Matsushita electric works, LTD. Fastening plate
ATA4806
(1) Hook (1) of KT7 series on the upper side of the DIN rail. (Fig. 3.4-1)
(2) Making the (1) part of the KT7 series as a support, fit the lower part of the KT7 series to the DIN rail.
KT7 series will be completely fixed to DIN rail with a “Click” sound. (Fig. 3.4-1)
(1)
(2)
(Fig. 3.4-1)
4. Wiring connection
Warning
Turn the power supplied to the instrument OFF before wiring or checking it.
Working or touching the terminal with the power switched ON may result in Electric Shock
causing severe injury or death.
Caution
• Do not leave wire chips in the KT7 series when wiring, because they could cause fire, malfunction and
trouble.
• Insert the connecting cable into the designated connector securely. Otherwise malfunction due to
imperfect contact may occur.
• Connect the AC power wire to the designated terminal as is written in this instruction manual, otherwise
it may burn and damage the KT7 series.
• Tighten the terminal screw with the specified torque. If not, it may damage the terminal screw and deform
the case.
• Use thermocouple and compensating lead wire that fit sensor input specification of this unit.
• Use the 3-wire RTD that corresponds to the sensor input specification of this unit.
• When using DC voltage and current input types, do not confuse the polarity when wiring.
• When using a 24V AC/DC for the power source, do not confuse the polarity when it is DC.
• Keep input wires (Thermocouple, RTD, etc) away from power source and load wires to avoid external
interference.
• To prevent the unit from harmful effects of the unexpected level noise, it is recommended that a surge
absorber be installed between the electromagnetic switch coils.
• This unit does not have built-in power switch, circuit breaker or fuse. Therfore, it is necessary to install
them in the circuit near the external unit.
(Recommended fuse: Time-lag fuse, rated voltage 250V AC rated current 2A)
Note
Tighten the terminal screw properly referring to the table below.
Terminal screw
M2.6
M2.0
Terminal No.
1 to 4
5 to 9
Torque
Max. 0.5Nem
Max. 0.25Nem
Terminal arrangement
Lower part of main body
CT input
• OUT : Control output
• RELAY: Relay contact output
• V/A : DC voltage output/ DC current
output
• EVT : Event output (Activates when
Alarm, Loop break alarm or
Heater burnout alarm [option]
is ON)
• TC : Thermocouple
• RTD : Resistance temperature detector
• DC : DC current or DC voltage
CT input socket
(Fig. 4-1)
Option: Heater burnout alarm
This alarm is not available for detecting current under phase control.
Use the current transformer (CT) provided, and pass
a lead wire of the heater circuit into a hole of the CT.
When wiring, keep the CT wire away from AC sources
or load wires to avoid the external interference.
5. Setup
CT
Power
supply
(Fig. 4-2)
Heater
Wire the power terminals only. After the power is turned on, the sensor input characters and temperature
unit are indicated on the PV display and the input range high limit value is indicated on the SV display for
approx. 3 seconds (Table 5-1).
(If any other value is set in the scaling high limit value, it is indicated on the SV display.)
During this time all outputs and the LED indicators are in OFF status.
Control will then start and the input value will be indicated on the PV display and setting value will be
indicated on the SV display.
(Table 5-1)
Input type
Input range
Resolution
–320 to 2500
–200 to 1370
1
( )
K
–199.9 to 750.0
–199.9 to
0.1
400.0
( )
–200 to1000 –320 to1800
1
J
( )
0 to
0 to
1
R
3200
1760
( )
0 to
0 to
1
S
3200
1760
( )
0 to
0 to
1
B
3300
1820
( )
–320 to 1500
–200 to 800
1
E
( )
–199.9 to 750.0
–199.9 to
0.1
( )
T
400.0
–320 to 2300
–200 to 1300
1
N
( )
0 to
0 to
1
PL2500
1390
( )
0 to
0 to
1
C(W/Re5-26)
4200
2315
( )
Pt100
–199.9 to 850.0
–199.9 to 999.9
0.1
( )
*1: Input range and
decimal point place
can be changed.
–200 to 850
JPt100
–199.9 to 500.0
–200 to 500
–300 to 1500
–199.9 to 900.0
–300 to 900
1
( )
0.1
( )
1
( )
4 to 20mA DC
0 to 20mA DC
0 to 1V DC
0 to 5V DC
1 to 5V DC
0 to 10V DC
–1999 to 9999
1
–1999 to 9999
1
–1999 to 9999
1
–1999 to 9999
1
–1999 to 9999
1
–1999 to 9999
1
*1,*2
*1,*2
*1
*1
*1
*1
5.1 Setup flow chart
PV/SV display mode
(Approx. 3s)
Output manipulated
variable indication
(Approx. 3s)
(Approx. 3s)
[Main setting mode]
SV
[ ]
[Sub setting mode]
AT setting
[
]
[Auxiliary function
setting mode 1]
Setting value lock
selection [
]
[Auxiliary function
setting mode 2]
Input type selection
[
]
OUT proportional band setting
[ ]
Sensor correction setting
[
]
Scaling high limit setting
[
]
Integral time setting
[ ]
Scaling low limit setting
[
]
Derivative time setting
[ ]
Decimal point place selection
[
]
ARW setting
[ ]
PV filter time constant setting
[
]
OUT proportional cycle setting
[ ]
OUT high limit setting
[
]
Manual reset setting
]
[
OUT low limit setting
[
]
Alarm setting
[
]
Control output ON/OFF action
hysteresis setting [
]
Heater burnout alarm setting
[ ]
Alarm action selection
[
]
Loop break alarm action time
]
setting [
Alarm action Energized/
Deenergized selection [
Loop break alarm action span
]
setting [
Alarm HOLD function selection
[
]
]
Alarm hysteresis setting
[
]
Alarm action delayed timer
setting [
]
Controller/Converter function
]
selection [
Direct/Reverse action selection
[
]
Output status selection when input
burnout [
]
û
: Press the
while the
key is being pressed.
û
(Approx. 3s): Press the
for 3 seconds while the
û
(Approx. 3s): Press the
for 3 seconds while the
ûWhen setting a value or selecting an item in the setting modes, use the
AT bias setting
[
]
key is being pressed.
key is being pressed.
or
key.
There are some setting characters which are not indicated depending on the specification.
5.2 Main setting mode
Character
Name, Description, Setting range
SV
• Sets the value for controlled object.
• Setting range: Scaling low limit value to scaling high limit value
(For DC voltage and current inputs, the placement of the
decimal point follows the selection)
Default value
0
5.3 Sub setting mode
Character
Name, Description, Setting range
AT setting
• Performs PID auto-tuning. However when PID auto-tuning has
not finished after 4 hours, PID auto-tuning is cancelled
automatically.
• PID auto-tuning cancellation :
PID auto-tuning performance:
OUT proportional band setting
• Sets the proportional band.
• The control action becomes ON/OFF action when set to 0.0
• Setting range: 0.0 to 110.0%
Integral time setting
• Sets the integral time.
• Setting the value to 0 disables the function.
• This setting item is not indicated for ON/OFF action.
• Setting range: 0 to 1000 seconds
Derivative time setting
• Sets the derivative time.
• Setting the value to 0 disables the function.
• This setting item is not indicated for ON/OFF action.
• Setting range: 0 to 300 seconds
Anti-reset windup setting
• Sets anti-reset windup.
• Available only for PID action.
• Setting the value to 0 disables the function.
• Setting range: 0 to 100%
OUT proportional cycle setting
• Sets the proportional cycle value for the control output (OUT).
• Not available for ON/OFF action or DC current output
• Setting range: 1 to 120 seconds
Manual reset setting
• Sets the reset value manually.
• Available only for P and PD action.
• Proportional band converted value (For DC voltage and
current inputs, the placement of the decimal point follows the
selection)
Alarm setting
• Sets the action point for the alarm output.
• Setting the value to 0 or 0.0 disables the function.
(excluding Process high and Process low alarms)
When Loop break alarm and Heater burnout alarm are applied
together, the output is common.
• Not available if No alarm action is selected in the Alarm action
selection.
• See (Table 5.3-1). (For DC voltage and current inputs, the
placement of the decimal point follows the selection)
Default value
2.5%
200 seconds
50 seconds
50%
30 seconds
or 3 seconds
0.0
0
Heater burnout alarm setting
• Sets the heater current value for Heater burnout alarm.
• Setting the value to 0.0 disables the function.
• Self-holding is not available for the alarm output.
When alarm and Loop break alarm are applied together,
the output is common.
• Available only when Heater burnout alarm is added.
• Rating 5A : 0.0 to 5.0A
Rating 10A: 0.0 to 10.0A
Rating 20A: 0.0 to20.0A
Rating 50A: 0.0 to 50.0A
Loop break alarm action time setting
• Sets the action time to assess the Loop break alarm.
• Setting the value to 0 disables the function.
• When alarm and Heater burnout alarm are applied together,
the output is common.
• Setting range: 0 to 200 minutes
Loop break alarm action span setting
• Sets the action span to assess the Loop break alarm.
• Setting the value to 0 disables the function.
• When alarm and Heater burnout alarm are applied together,
the output is common.
• Setting range
( ) or
Thermocouple and RTD inputs: 0 to 150
( )
0.0 to 150.0
DC voltage and current inputs: 0 to 1500 (The placement of the
decimal point follows the selection)
(Table 5.3-1)
Alarm action type
High limit alarm
Low limit alarm
High/Low limits alarm
High/Low limit range alarm
Process high alarm
Process low alarm
High limit alarm with standby
Low limit alarm with standby
High/Low limits with standby
Setting range
–(Scaling span) to scaling span
–(Scaling span) to scaling span
0 to scaling span
0 to scaling span
Scaling low limit value to scaling high limit value
Scaling low limit value to scaling high limit value
–(Scaling span) to scaling span
–(Scaling span) to scaling span
0 to scaling span
0.0A
0 minutes
0
Negative low
limit value is
–199.9 or
–1999.
Positive high
limit value is
999.9 or 9999.
5.4 Auxiliary function setting mode 1
Character
Name, Description, Setting range
Default value
Unlock
Setting value lock selection
• Locks the setting value to prevent setting errors.
The setting item to be locked depends on the designation.
• When Lock 1 or Lock 2 is designated, PID auto-tuning cannot
be carried out.
•
(Unlock): All setting values can be changed.
(Lock 1): None of setting values can be changed.
(Lock 2): Only main setting mode can be changed.
(Lock 3): All setting values can be changed except
Controller/Converter
function selection. However they return to their former value
after power is turned off because they are not saved in the
non-volatile memory.
Sensor correction setting
0.0
• Sets the sensor correction value for the sensor.
• Thermocouple and RTD inputs: –100.0 to 100.0
( )
DC voltage and current inputs: –1000 to 1000 (The placement of
the decimal point follows the selection)
5.5 Auxiliary function setting mode 2
Character
Name, Description, Setting range
Default value
K
Input type selection
(–200 to 1370 )
• The input type can be selected from thermocouple (22 types),
RTD (8 types), DC current (2 types) and DC voltage(4 types),
/
can be selected as well.
and the unit
K
–320 to 2500
K
–200 to 1370 :
:
–199.9 to 400.0 :
–199.9 to 750.0 :
:
:
J
–200 to 1000
J
–320 to 1800
:
:
R
0 to 1760
R
0 to 3200
:
:
S
0 to 1760
S
0 to 3200
:
:
B
0 to 1820
B
0 to 3300
:
:
E
–200 to 800
E
–320 to 1500
T
–199.9 to 400.0 :
T
–199.9 to
:
N
–200 to 1300
750.0 :
0 to 1390
:
:
PLN
–320 to 2300
:
0 to 2500
:
C (W/Re5-26)0 to 2315
PL:
Pt100
–199.9 to 850.0 :
C (W/Re5-26)
0 to 4200
JPt100
–199.9 to 500.0 :
:
Pt100
–200 to 850
Pt100
–199.9 to 999.9 :
:
JPt100
–200 to 500
JPt100 –199.9 to 900.0 :
Pt100
–300 to 1500 :
:
JPt100
–300 to 900
4 to 20mA
–1999 to 9999:
0 to 20mA
–1999 to 9999:
0 to 1V
–1999 to 9999:
0 to 5V
–1999 to 9999:
1 to 5V
–1999 to 9999:
0 to 10V
–1999 to 9999:
Scaling high limit setting
1370
• Sets the scaling high limit value.
• Setting range: Scaling low limit value to input range high limit
value
(For DC voltage and current inputs, the placement of the
decimal point follows the selection.)
Scaling low limit setting
–200
• Sets the scaling low limit value.
• Input range low limit value to scaling high limit value
(For DC voltage and current inputs, the placement of the
decimal point follows the selection.)
Decimal point place selection
No decimal
• Selects decimal point place.
point
• Available only for DC input.
• No decimal point, 1 digit after decimal point
2 digits after decimal point, 3 digits after decimal point
PV filter time constant setting
0.0 seconds
• Sets PV filter time constant.
(If the setting value is too large, it affects control result due to
the delay of response)
• Setting range: 0.0 to 10.0 seconds
OUT high limit setting
100%
• Sets the control output high limit value.
• Not available for ON/OFF action.
• Setting range: OUT low limit value to 105%
(Setting greater than 100% is effective to DC current output type)
OUT low limit setting
• Sets the control output low limit value.
• Not available for ON/OFF action.
• Setting range: –5% to OUT high limit value
(Setting less than 0% is effective to DC current output type)
OUT ON/OFF action hysteresis setting
• Sets the ON/OFF action hysteresis for the control output.
• Available only when the control action is ON/OFF action (P=0)
• Setting range
Thermocouple and RTD inputs: 0.1 to 100.0 ( )
DC voltage and current inputs : 1 to 1000 (The placement of the
decimal point follows the selection)
Alarm action selection
• Selects an alarm action type.
No alarm action
:
High limit alarm action
:
Low limit alarm action
:
High/Low limits alarm action
:
High/Low limit range alarm action
:
Process high alarm action
:
Process low alarm action
:
High limit alarm action with standby
:
Low limit alarm action with standby
:
High/Low limits alarm action with standby:
Alarm action Energized/Deenergized selection
• Selects the alarm action Energized/Deenergized.
• Not available if No alarm action is selected in the Alarm action
selection.
Deenergized:
• Energized:
Alarm HOLD function selection
• Selects whether alarm HOLD function is [Used] or [Not used].
If alarm HOLD function is set to [Used], once the alarm
functions, alarm output remains until the power is turned off.
• Not available if No alarm action is selected in the Alarm action
selection
• Alarm HOLD [Not used]:
Alarm HOLD [Used]
:
Alarm hysteresis setting
• Sets the alarm hysteresis.
• Not available if No alarm action is selected in the Alarm action
selection
• Setting range
Thermocouple and RTD inputs: 0.1 to 100.0 ( )
DC voltage and current inputs: 1 to 1000 (The placement of the
decimal point follows the selection)
Alarm action delayed timer setting
• Sets the alarm action delayed time.
When the setting time has passed after the input enters alarm
output range, alarm output activates.
• Not available if No alarm action is selected in the Alarm action
selection.
• Setting range: 0 to 9999 seconds
Direct/Reverse selection
• Selects Reverse (heating) or Direct (cooling) control action.
• Reverse (Heating) action :
Direct (Cooling) action :
0%
1.0
No alarm action
Energized
Alarm HOLD
[Not used]
1.0
0 seconds
Reverse
(Heating) action
AT bias setting
• Set bias value during PID auto-tuning.
• Not available if DC voltage or current input is selected
in the Input type selection and when action is not PID, either.
(0 to 100 ) or
• Setting range: 0 to 50
(0.0 to 100.0 )
0.0 to 50.0
Controller/ Converter function selection
• Selects controller or converter function.
• This setting item is indicated only when the control output
is DC current output type.
• Controller function :
Converter function :
Output status selection when input burnout
• Selects whether the OUT output is turned OFF or not when
DC input is overscale or underscale.
• Available only for DC current output type with DC input.
•
(Output OFF)
(Output ON)
20
Controller
function
Output OFF
Sensor correction function
This corrects the input value from the sensor. When a sensor cannot be set at a location where
control is desired, the sensor measuring temperature may deviate from the temperature in the
controlled location. When controlling with plural controllers, the accuracy of sensors affects the
control. Therefore, sometimes the measured temperature (input value) does not concur with the
same setting value. In such a case, the control can be set at the desired temperature by adjusting
the input value of sensors.
Loop break alarm
The alarm will be activated when the process variable (PV) does not rise to the span within
the time it takes to assess the Loop break alarm after the manipulated variable has reached
100% or the output high limit value.
The alarm will also be activated when the process variable (PV) does not fall to the span within
the time it takes to assess the Loop break alarm after the manipulated variable has reached
0% or the output low limit value.
When the control action is Direct (Cooling), read “fall” for “rise” and vice versa.
Energized/Deenergized function
When [alarm action energized] is selected, the alarm output (between terminals 8-9) is
conducted (ON) while the alarm output indicator is lit.
The alarm output is not conducted (OFF) while the alarm output indicator is not lit.
When [alarm action deenergized] is selected, the alarm output (between terminals 8-9) is not
conducted (OFF) while the alarm output indicator is lit.
The alarm output is conducted (ON) while the alarm output indicator is not lit.
A1 hysteresis
A1 hysteresis
ON
ON
OFF
OFF
SV setting
+ A1 setting point
High limit alarm (When Energized is set)
SV setting
+ A1 setting point
High limit alarm (When Deenergized is
set)
(Fig. 5.5-1)
(Fig. 5.5-2)
5.6 Output manipulated variable indication
Name and Description
Output manipulated variable indication
• In the PV/SV display mode, press the
key for approx. 3 seconds.
Keep pressing the
key until the output manipulated variable shows up, though the main
setting mode appears temporarily during the process.
(The SV display indicates output manipulated variable and the 1st decimal point from the right
blinks in a 0.5 second cycle)
If the
key is pressed again, the mode reverts to the PV/SV display.
6. Converter function
Caution
• When using this controller as a converter, take 1 second into consideration since input/output
response time is approx. 1 second.
• When switching from converter function to controller function, the control parameter and values
set by converter function are held even if the function is switched to controller function.
So, correct the control parameter and values which are set by converter function to the value
necessary for the controller function after switching to the controller function.
The converter function of this instrument converts each input (thermocouple, RTD, DC voltage and DC
current inputs) value to “4 to 20mA DC” and outputs it using the control parameter of the controller.
When this instrument is used as a converter, follow the process (1) to (7) described below.
After the process (1) to (7) is finished, this instrument can be used as a converter.
(1) Wire and connect this controller (Power, Input and Output).
(2) Turn the power of this controller ON.
and
key (for approx. 3s).
(3) Bring up “Auxiliary function setting mode 2” by pressing the
)”.
(4) Select the sensor type from “Input type selection (
)”.
(5) Set the high limit of the value that is going to be converted during “Scaling high limit setting (
(6) Set the low limit of the value that is going to be converted during “Scaling low limit setting (
)”.
) from “Control/ Converter function selection (
)”.
(7) Select converter (
• To activate the alarm action by Converter function, set the alarm action to Process alarm action.
If converter function is selected from “Controller/Converter function selection” in Auxiliary function
setting mode 2, the parameter below is automatically set. (Table 6-1)
However, this is applied only to the DC current output type.
(Table 6-1)
Setting item
Setting value
Setting item
Setting value
SV
Scaling low limit Alarm setting
0
Proportional band
100.0%
Loop break alarm action time
0 seconds
Integral time
0 seconds
Loop break alarm action span
0
Derivative time
0 seconds
Direct/Reverse action selection Direct action
Manual reset setting
0.0
7. Running
After mounting and wiring in the control panel (DIN rail) are finished, running is started in the following
manner.
(1) Turn the power supply to the KT7 Series ON.
For approx. 3s after power is turned on, the character of the sensor type and temperature unit are
indicated on the PV display, and the rated maximum value is indicated on the SV display.
See [Table 5-1].
(If any other value is set in the scaling high limit value setting, SV display indicates it)
During this time, all outputs and LED indicators are in OFF status.
After that, PV display indicates actual temperature and SV display indicates the main setting value.
(2) Input each setting value.
Input each setting value, referring to “5. Setup”.
(3) Turn the load circuit power ON.
Starts the control action so as to keep temperature of the controlled object at the main setting value.
8. Action explanation
8.1 OUT action
Heating (Reverse) action
Cooling (Direct) action
Proportional band
Proportional band
ON
ON
Control
action
OFF
OFF
SV setting
SV setting
Relay contact
output
3
3
3
3
3
3
4
4
4
5
5
5
Cycle action is performed according to deviation
Cycle action is performed according to deviation
+ 3
+ 3
Non-contact
voltage output
+ 3
12V DC
4
+ 3
0V DC
4
12/0V DC
4
Cycle action is performed according to deviation
+ 3
+ 3
DC current
output
20mA DC
4
+ 3
20 to 4mA DC
4
0V DC
4
4mA DC
4
Lit
Unlit
0/12V DC
4
+ 3
12V DC
4
Cycle action is performed according to deviation
+ 3
Changes continuously according to deviation
Indication
(OUT) Green
+ 3
+ 3
4mA DC
4
4 to 20mA DC
4
+ 3
20mA DC
4
Changes continuously according to deviation
Unlit
Lit
part : Acts ON or OFF.
8.2 OUT ON/OFF action
Cooling (direct) action
Heating (reverse) action
Hysteresis
Hysteresis
ON
ON
OFF
OFF
Control action
SV setting
Relay contact
output
Non-contact
voltage output
DC current
output
SV setting
3
3
3
3
4
4
4
4
+ 3
+ 3
+ 3
12V DC
4
+ 3
20mA DC
4
+3
0V DC
4
+ 3
0V DC
4
+ 3
4mA DC
4
4mA DC
4
12V DC
4
+3
20mA DC
4
Indication
(OUT) Green
Lit
part: Acts ON or OFF.
Unlit
Unlit
Lit
8.3 EVT (Alarm) action
High limit alarm
Low limit alarm
A1 hysteresis
Alarm
action
ON
OFF
Alarm
output
ON
OFF
+ A1 setting
point
SV
setting
OFF
A1 setting
point
+ side
+ side
side
side
High/Low limit range alarm
SV
setting
A1 setting
point
+ A1 setting
point
A1 hysteresis
ON
ON
OFF
A1 setting
point
A1 setting
point
SV
setting
A1 setting
point
A1 hysteresis
ON
OFF
SV
setting
Process low alarm
Process high alarm
A1 hysteresis
Alarm
action
A1 hysteresis
A1 hysteresis
ON
A1 setting
point
High/Low limits alarm
OFF
A1 setting
point
A1 setting
point
Alarm
output
High limit alarm with standby
Low limit alarm with standby
A1 hysteresis
Alarm
action
ON
A1 hysteresis
ON
OFF
A1 setting
point
Alarm
output
A1 hysteresis
ON
OFF
+ A1 setting
point
SV
setting
High/Low limit alarm with standby
A1 setting
point
+ side
+ side
side
side
OFF
SV
setting
+ A1 setting
point
A1 setting
point
: Event (EVT) output terminals between 8 and 9 is ON.
: Event (EVT) output terminals between 8 and 9 is ON or OFF.
: Event (EVT) output terminals between 8 and 9 is OFF.
: Standby functions in this section.
Event (EVT) output indicator lights up when output terminals between
8 and 9 is ON, and goes out when between them is OFF.
8.4 EVT (Heater burnout alarm) action
ON
Heater burnout
alarm action
OFF
Heater burnout alarm setting point
Small
Load current
Large
Indication
(EVT) Red
Lit
Unlit
: Event (EVT) output terminals between 8 and 9 is ON
: Event (EVT) output terminals between 8 and 9 is OFF
Event (EVT) output indicator lights up when output terminals between 8 and 9 is ON
and goes out when between them is OFF.
SV
setting
A1 setting
point
9. PID auto-tuning of this controller
In order to set each P, I, D values and ARW automatically, this system gives a fluctuation
to the controlled object to get an optimal value.
One of 3 types of fluctuation below is automatically selected.
(1) When the difference between the setting value and processing temperature is large as
the temperature rises.
When AT bias is set to 20 ( ), a fluctuation is applied at the temperature 20 ( ) lower than the setting
value.
Temp.
Setting
value
Temperature 20 ( ) lower
than the setting value
(1): Calculating PID constant
(2): PID contatnt calculated
(3): Controlled by the PID
(4)
constant set by auto-tuning.
(4): AT bias value
Time
AT
(1)
(2)
(3)
AT : Auto-tuning starting point
(2) When the control is stable
Fluctuation is applied at the setting value.
Temp.
(1): Calculating PID constant
(2): PID constant calculated
(3): Controlled by PID constant
Setting
value
set by auto-tuning
AT : Auto-tuning starting point
Time
AT
(1)
(2)
(3)
(3) When the difference between the setting value and processing temperature is large as
the temperature falls
When AT bias is set to 20 ( ), fluctuation is applied at the temperature 20 ( ) higher than the setting
value.
Temperature 20 ( ) higher
than the setting value
Temp.
Setting
value
(4)
(1): Calculating PID constacnt
(2): PID constant calculated
(3): Controlled by PID constant
set by auto-tuning
(4): AT bias value
AT : Auto-tuning starting point
Time
AT
(1)
(2)
(3)
10. Specifications
10.1 Standard specification
Model name
: Temperature controller
Mounting method
: DIN rail mounting method
Setting method
: Input system using membrane sheet key
Display
PV display
: Red LED 4 digits, character size 7.4 x 4mm (H x W)
SV display
: Green LED 4 digits, character size 7.4 x 4mm
(H x W)
Input
External resistance: 100
or less
Thermocouple : K, J, R, S, B, E, T, N, PL- , C (W/Re5-26)
or less
However, for thermocouple B, external resistance, 40
RTD
: Pt100, JPt100, 3-wire system
Allowable input lead wire resistance (10
or less
per wire)
DC current
: 0 to 20mA DC, 4 to 20mA DC, input impedance 50
shunt resistor (AKT4811, sold separately) between input
[Connect 50
terminals 5 and 6]
Allowable input current: 50mA or less
DC voltage
:
0 to 5V DC, 1 to 5V DC,
0 to 1V DC
0 to 10V DC
Input impedance
1M
or 100k
or greater
greater
Allowable input voltage 5V or less
15V or less
Allowable signal source
or less
100
or less
2k
resistance
Accuracy (Setting and Indication)
Thermocouple : Within
0.2% of input span
1 digit, or
2
(4 ) whichever is greater
(0 to 400 ): Within
6
(12 )
R, S input 0 to 200
(0 to 600 ): Accuracy is not guaranteed.
B input 0 to 300
K, J, E, N input, less than 0
(32 ): Within
0.4% of input span
1 digit
0.1% of input span
1 digit, or within
1
(2 ) whichever
RTD : Within
is greater
DC voltage
: Within
0.2% of input span
1 digit
0.2% of input span
1 digit
DC current
: Within
Input sampling period : 0.25 seconds
Control
Control action
• PID action (with auto-tuning function)
• PI action: When derivative time is set to 0
• PD action (with manual reset function): When integral time is set to 0
• P action (with manual reset function): When derivative and integral time are set to 0
• ON/OFF action: When proportional band is set to 0
OUT proportional band
: 0.0 to 110.0% (ON/OFF action when set
to 0.0)
Integral time
: 0 to 1000 seconds (Off when set to 0)
Derivative time
: 0 to 300 seconds (Off when set to 0)
OUT proportional cycle: 1 to 120 seconds
ARW
: 0 to 100%
Proportional band converted value
Manual reset
:
Output limit
: 0 to 100% (DC current output type: –5 to 105%)
(Not available for ON/OFF action)
( )
Hysteresis
: Thermocouple and RTD inputs: 0.1 to 100.0
DC voltage and current inputs: 1 to 1000
(The placement of the decimal point follows the selection)
Control output (OUT)
• Relay contact: 1a, Control capacity
3A
250V AC (Resistive load)
1A
250V AC (Inductive load COS ø =0.4)
Electrical life, 100,000 times
Max. 40mA (Short circuit protected)
• Non-contact voltage (for SSR drive): 12 , V DC
• DC current: 4 to 20mA DC, Load resistance: Max. 550
Output accuracy: Within
0.3% of output span
Resolution
: 12000
EVT output
• Alarm output [Common output with Loop break alarm and Heater burnout alarm (option)]
The alarm action point is set by
deviation to the main setting (excluding Process alarm)
deviation setting (excluding Process alarm) to the
and when input exceeds the range in
main setting, alarm (EVT) turns ON or OFF (High/Low limit range alarm).
When Deenergized is selected in the Energized/Deenergized selection, alarm (EVT)
activates conversely.
Setting accuracy : The same as indication accuracy
Action
: ON/OFF action
Hysteresis
: Thermocouple and RTD inputs: 0.1 to 100.0 ( )
DC voltage and current inputs: 1 to 1000 (The placement of the
decimal
point follows the selection)
Output
: Open collector, Control capacity 24V DC
0.1A (Max.)
Alarm output action : One alarm action is selectable from below by front key operation.
High limit, Low limit, High/Low limits, High/Low limit range, Process high,
Process low, High limit with standby, Low limit with standby,
High/Low limits with standby and No alarm action
Energized/Deenergized: Alarm (EVT) output Energized/Deenergized can be selected.
Energized Deenergized
Red (EVT) LED
Lights
Lights
EVT output
ON
OFF
Alarm HOLD function selection: Once the alarm is activated, alarm output is held until the
power is turned off.
• Loop break alarm output (Common output with Alarm and Heater burnout alarm [Option])
Detects heater burnout, sensor burnout, and abnormality at operation end.
Setting range: Loop break alarm action time setting: 0 to 200 minutes
Loop break alarm action span setting
Thermocouple and RTD inputs: 0 to 150 ( ) or 0.0 to 150.0 ( )
DC voltage and current inputs : 0 to 1500
(The placement of the decimal point follows the selection)
Output: Open collector, Control capacity, 24V DC
0.1A (Max.)
Converter function: See “6. Converter function”
Insulation • Dielectric strength: Circuit insulation configuration
5
6
7
8
Input
9
EVT
CT input
CPU
Insulation
Power supply
1
2
OUT
3
4
Insulated resistance: 10M
or greater at 500V DC
Dielectric strength: 1.5kV AC for 1 minute between input
terminal and power terminal
1.5kV AC for 1 minute between output terminal and power terminal
Power consumption
: Approx. 6VA
Ambient temperature : 0 to 50
Ambient humidity
: 35 to 85%RH (no condensation)
Weight
: Approx.120g
External dimension
: 22.5 x 75 x 100mm (W x H x D)
Material
: Flame resistant resin (Case)
Color
: Ash gray (Case)
Attached function
[Setting value lock]
[Sensor correction]
[Power failure countermeasure]
The setting data is backed up in non-volatile IC memory.
[Self diagnosis]
The CPU is monitored by a watchdog timer, and when any abnormal status is found on the CPU,
the controller is switched to warm-up status with all outputs turned off.
[Automatic cold junction temperature compensation] (Only thermocouple input)
This detects the temperature at the connection terminal between the thermocouple and the
instrument and always keeps it on the same status as when the reference junction is located
(32 ).
at 0
[Input burnout indication]
Thermocouple and RTD inputs
”,
If the input value exceeds the Indication range high limit value, the PV display blinks “
”.
and if the input value exceeds the Indication range low limit value, the PV display blinks “
If the input value exceeds the Control range, OUT is turned OFF (for DC current output type,
OUT low limit value).
(However, for manual control, it outputs the preset manipulated variable)
Input
Input range
Indication range
Control range
–199.9 to 400.0
–199.9 to 450.0
–205.0 to 450.0
K T
–199.9 to 750.0
–199.9 to 850.0
–209.0 to 850.0
–250
to
–250
to
–200
to
1420
1420
1370
K
–320
to
–370
to
–370
to
2500
2550
2550
–250
to
–250
to
–200
to
1050
1050
1000
J
–370
to
–370
to
–320
to
1850
1850
1800
–50
to
–50
to
0
to
1810
1810
1760
R S
0
to
–50
to
–50
to
3200
3250
3250
–50
to
–50
to
0
to
1870
1870
1820
B
0
to
–50
to
–50
to
3300
3350
3350
–200 to 800
–250 to 850
–250 to 850
E
–370
to
–370
to
–320
to
1550
1550
1500
–250
to
–250
to
–200
to
1350
1350
1300
N
–320
to
–370
to
–370
to
2300
2350
2350
–50
to
–50
to
0
to
1440
1440
1390
PL0
to
–50
to
–50
to
2500
2550
2550
–50
to
–50
to
0
to
2365
2365
2315
C(W/Re5-26)
–50
to
–50
to
0
to
4250
4250
4200
–199.9 to 850.0
–199.9 to 900.0
–210.0 to 900.0
–200 to 850
–210 to 900
–210 to 900
Pt100
–199.9 to 999.9
–199.9 to 999.9
–211.0 to 1099.9
–318 to 1600
–318 to 1600
–300 to 1500
JPt100
–199.9 to 500.0
–199.9 to 550.0
–206.0 to 550.0
–200 to 500
–206 to 550
–206 to 550
–199.9 to 900.0
–199.9 to 999.9
–211.0 to 999.9
–300 to 900
–312 to 1000
–312 to 1000
DC current and voltage inputs
”, and
If the PV exceeds Indication range high limit value, the PV display blinks “
”.
if the PV exceeds the Indication range low limit value, the PV display blinks “
Indication range : [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
However, if the input value exceeds the range –1999 to 9999, the PV
” or “
”.
display blinks “
Control range
: [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
” for 4 to 20mA DC
DC input burnout: When DC input is burnt out, PV display blinks “
” for 0 to 1V DC input.
and 1 to 5V DC inputs, and “
For 0 to 20mA DC, 0 to 5V DC and 0 to 10V DC inputs, the PV display
indicates the corresponding value for which 0mA or 1V is inputted.
[Burnout]
When the thermocouple or RTD input is burnt out, OUT is turned off and PV display blinks
” (for DC current output type, OUT low limit value).
“
Accessories included: Instruction manual 1 copy
When the option Heater burnout alarm is added: Wire harness 3m, 1 length
When the option Heater burnout alarm is added:
For rating 5A, 10A, 20A
CT (AKT4815)
1 piece
For rating 50A
CT (AKT4816) 1 piece
shunt resistor (AKT4811)
1 piece
Accessories sold separately: For DC current input, 50
10.2 Optional specifications
Heater burnout alarm
Watches the heater current with CT (Current transformer) and detects the burnout.
When this option is added, this option shares common output with Alarm output and Loop break alarm.
This option cannot be applied to DC current output type.
Rating
: 5A, 10A, 20A, 50A (Must be specified)
Setting range : 5A, 0.0 to 5.0A (Off when set to 0.0)
10A, 0.0 to 10.0A (Off when set to 0.0)
20A, 0.0 to 20.0A (Off when set to 0.0)
50A, 0.0 to 50.0A (Off when set to 0.0)
5% of the rated value
Setting accuracy:
Action
: ON/OFF action
Output
: Open collector
Control capacity, 24V DC
0.1A (Max.)
11. Troubleshooting
If any malfunctions occur, refer to the following items after checking the power supply to the controller.
11.1 Indication
Problem
Presumed cause and solution
• Sensor (Thermocouple, RTD and DC voltage 0 to 1V DC
“
” is blinking on the PV
input) is burnt out.
display.
Change the sensor for new one.
• Is the lead wire of the sensor (Thermocouple, RTD and DC
voltage 0 to 1V DC input ) securely connected?
Connect it to the input terminal properly.
The indication on the PV display • Check if the input signal source for DC voltage (0 to 10V DC)
does not change.
and DC current (0 to 20mA DC) is normal.
• Is the input signal wire for the DC current (0 to 20mA DC)
and DC voltage 0 to 10V DC securely connected to the input
terminal of this controller?
Connect the sensor lead wire securely to the input terminal
of this controller.
“
” is blinking on the PV
• Check if the input signal source for sensor (DC current
display.
“4 to 20mA DC” and DC voltage “1 to 5V DC” input) is
normal.
• Is the input signal wire of DC current 4 to 20mA DC and
DC voltage1 to 5V DC securely connected to the terminal
The indication on the PV display
is abnormal or unstable.
“
” is indicated on the
PV display.
of this instrument?
Connect the input signal wire securely to the terminal of
the instrument.
• Is designation of the sensor (input) correct?
Set the correct sensor (input).
• Is the polarity of the sensor input correct?
Wire it correctly.
• Temperature unit ( / ) is mistaken.
Set the correct unit.
• AC may be leaking into the input of this controller from the
thermocouple or RTD connected to the measured object.
Keep AC from leaking into the input of this controller
from the thermocouple or RTD of the measured object.
• Internal memory is defective.
Contact our agency or us.
11.2 Key operation
Problem
Presumed cause and solution
• Lock 1 or Lock 2 is selected in setting value lock selection.
• Setting values do not change
Cancel the Lock mode.
or
even if the
• PID auto-tuning is performing.
key is
Cancel PID auto-tuning.
pressed during setting mode
• The setting indication does not • The value of scaling high limit setting or low limit setting in
auxiliary function setting mode 2 may be set at the point the
change in the input range even
value does not change.
if the
,
keys are
Set the proper value.
pressed, and unable to set the
value.
• If you have any inquiries, please consult our agency or the shop where you purchased the unit.
Matsushita Electric Works, Ltd.
Tatsuno Matsushita Electric Works, Ltd.
Mail address : 300 Katayama, Tatsuno-cho, Tatsuno-city, Hyogo-pref, Japan
Telephone
: +81-791-63-0511
No.KT71E1 2002.03
