KT7 Instruction manual Temperature Controller

KT7 Instruction manual Temperature Controller
Instruction manual
Temperature Controller
KT7
No.KT71E4 2009.05
To prevent accidents arising from the misuse of this controller, please ensure the operator 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.
(Alcohol based substances may tarnish or deface 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.
• Matsushita Electric Works, Ltd. is not liable for any damage or secondary damage(s) incurred as a result
of using this product, including any indirect damage.
1. Model number
1.1 Explanation of model number
A K T 7
1
1 0
(1) (2) (3) (4)
(5) (6)
(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 keypad 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 type and Energized /Deenergized can be selected
by keypad 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)
(6) Serial communication --- 1: Applied (The number is indicated only when Serial communication
is added.)
1
1.2 How to read the rated label
The rated label is attached to the case.
When Heater burnout alarm is added, CT rated current is written in the bracket ( ).
(e.g.)
(1)
AKT71111001
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
The red LED lights when Event output [Alarm, Loop break alarm
or Heater burnout alarm (Option)] is ON.
(2) OUT indicator
When OUT (control output) is ON, the green LED lights.
For DC current output type, this flashes corresponding to the output (1)
manipulated variable.
(2)
(3) T/R indicator
The yellow LED flashes during serial communication.
(5)
(4) AT indicator
The yellow LED flashes while PID auto-tuning is being performed.
(6)
(5) PV display
Indicates the PV (input value) with a Red LED.
(6) SV display
Indicates the SV (main set value) with a Green LED.
(7)
(7) Increase key
Increases the numeric value.
(8)
(8) Decrease key
Decreases the numeric value.
(9) Mode key
Selects the setting mode or registers the set value.
(By pressing the Mode key, the set value can be registered)
(10) Sub mode key
Enters Auxiliary function setting mode 2 in combination with the Mode key.
(3)
(4)
(9)
(10)
(Fig. 2-1)
Notice
When setting the specifications and functions of this controller, connect terminals 1 and 2 for power
source first, then set them referring to “5. Setup” and “8. Operation flowchart” before performing
“3. Mounting to the control panel” and“4. Wiring”.
3. Mounting to the 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
Ensure the mounting location corresponds to the following conditions:
• A minimum of dust, and an absence of corrosive gases
• No flammable, explosive gases
• 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
2
75
3.2 External dimensions (Unit: mm)
97
100
22.5
4
(Fig. 3.2-1)
3.3 CT (Current transformer) external dimensions (Unit: mm)
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 both ends 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
Panasonic Electric Works Co., Ltd.
Fastening plate ATA4806
(A)
(1) Hook (A) of KT7 series on the upper side of
the DIN rail. (Fig. 3.4-1)
(2) Making (B) 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)
(B)
(Fig. 3.4-1)
4. Wiring
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 severe injury or
death due to Electric Shock.
3
Terminal arrangement
Bottom of the unit
• OUT : Control output
• RELAY : Relay contact output
• V/A
: DC voltage output/ DC current
output
• EVT : Event output [Activated when
Alarm, Loop break alarm or
Heater burnout alarm (option)
is ON]
• TC
: Thermocouple
• RTD : Resistance temperature detector
• DC
: DC current or DC voltage
• RS-485: Serial communication
Communication
C5 (RS-485)
CT input
(Fig. 4-1)
Caution
• Do not leave bits of wire in the KT7 series when wiring, because they could cause fire or malfunction.
• Insert the connecting cable into the designated connector securely. Otherwise malfunction may occur due
to imperfect contact.
• 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. Excessive force could damage the terminal screw
and deface the case.
• To extend a thermocouple’s lead wire, be sure to use a compensating lead wire in accordance with the sensor
input specification. (If any other compensating lead wire is used, a temperature indication error may be caused.)
• 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.
• For a 24V AC/DC power source, do not confuse polarity when using direct current (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.
Recommended ferrules
Terminal Terminal
Ferrules with
Conductor cross Tightening torque
Crimping pliers
sections
number
screw
insulation sleeve
2
AI 0.25-8 YE
0.2 to 0.25mm
AI 0.34-8 TQ
0.25 to 0.34mm2
AI 0.5-8 WH
0.34 to 0.5mm2
1 to 4
M2.6
0.5 to 0.6N・m
AI 0.75-8 GY
0.5 to 0.75mm2
CRIMPFOX ZA3
AI 1.0-8 RD
0.75 to 1.0mm2
CRIMPFOX UD6
AI 1.5-8 BK
1.0 to 1.5mm2
AI 0.25-8 YE
0.2 to 0.25mm2
5 to 9
M2.0
AI 0.34-8 TQ
0.25 to 0.34mm2 0.22 to 0.25N・m
AI 0.5-8 WH
0.34 to 0.5mm2
Option: Heater burnout alarm
(1) This alarm is not available for detecting heater current
under phase control.
(2) This alarm is not available for detecting 3-phase
heater current.
(3) Use the current transformer (CT) provided, and pass one
lead wire of the heater circuit into the hole of the CT.
(4) When wiring, keep CT wire away from AC sources
or load wires to avoid the external interference.
4
CT input socket
CT
Power
supply
(Fig. 4-2)
Heater
5. Setup
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 during the scaling high limit value setting, the value is indicated on the SV display.)
During this time all outputs and the LED indicators are in OFF status.
Control will then start indicating the input value on the PV display and SV on the SV display.
(While control output OFF function is working,
is indicated on the PV display.)
(Table 5-1)
Sensor input
PV display
SV display
PV display
SV display
K
J
R
S
B
E
T
N
PLC (W/Re5-26)
Pt100
JPt100
4 to 20mA DC
0 to 20mA DC
0 to 1V DC
0 to 5V DC
0 to 10V DC
1 to 5V DC
5.1 Main setting mode
Character
(PV display)
Scaling high
limit value
Scaling high
limit value
Name, Description, Setting range
Default value
(SV display)
SV
0
• Sets the SV.
• SV low limit to SV high limit or scaling low limit value to scaling high limit value
(For DC voltage and current inputs, the placement of the decimal point follows
the selection)
5.2 Sub setting mode
Character
Default value
Name, Description, Setting range
(PV display)
(SV display)
AT setting
• Performs PID auto-tuning. However when PID auto-tuning has
not finished after 4 hours, PID auto-tuning is cancelled automatically.
• If Auto-tuning is cancelled during the process, P, I, D values return to the previous value.
• PID auto-tuning cancellation:
, PID auto-tuning performance:
OUT proportional band setting
2.5%
• Sets the OUT proportional band.
• The control action becomes ON/OFF action when set to 0 or 0.0.
• 0.0 to 110.0%
Integral time setting
200 seconds
• Sets the integral time.
• Setting the value to 0 disables the function.
• Not available for ON/OFF action.
• 0 to 1000 seconds
Derivative time setting
50 seconds
• Sets the derivative time.
• Setting the value to 0 disables the function.
• Not available for ON/OFF action.
• 0 to 300 seconds
Anti-reset windup setting
50%
• Sets anti-reset windup.
• Available only for PID action.
• 0 to 100%
5
.
and
measured
current
value are
indicated
alternately.
OUT proportional cycle setting
Relay contact output: 30sec
• Sets the proportional cycle value for OUT.
Non-contact voltage output: 3sec
• Not available for ON/OFF action or DC current output type
With the relay contact type, if the proportional cycle time is decreased, the
frequency of the relay action increases and the life of the relay contact is
shortened.
• 1 to 120 seconds
Manual reset setting
0.0
• 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 value setting
0
• 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 alarm).
• Alarm, Loop break alarm and Heater burnout alarm (option) utilize common output
terminals.
• Not available if No alarm action is selected during the Alarm type selection.
• See (Table 5.2-1).
Heater burnout alarm value setting
0.0A
• Sets the heater current value for Heater burnout alarm.
• Available only when Heater burnout alarm (option) is added.
• Setting the value to 0.0 disables the function.
• It is recommended to set approx. 80% of the heater current value (set value)
considering the voltage fluctuation of power supply.
• Upon returning to set limits, the alarm will stop.
• Heater burnout alarm (option), Alarm and Loop break alarm utilize common output
terminals.
• Rating 5A : 0.0 to 5.0A
Rating 10A: 0.0 to 10.0A
Rating 20A: 0.0 to 20.0A Rating 50A: 0.0 to 50.0A
Loop break alarm action time setting
0 minutes
• Sets the action time to assess the Loop break alarm.
• Setting the value to 0 disables the function.
• Loop break alarm, Alarm and Heater burnout alarm (option) utilize common output
terminals.
• 0 to 200 minutes
Loop break alarm action span setting
0
• Sets the action span to assess the Loop break alarm.
• Setting the value to 0 disables the function.
• Loop break alarm, Alarm and Heater burnout alarm (option) utilize common output
terminals.
• Thermocouple, RTD input: 0 to 150 ( ) or 0.0 to 150.0 ( )
DC voltage, current input: 0 to 1500 (The placement of the decimal point
follows the selection)
(Table 5.2-1)
Alarm type
Setting range
High limit alarm
–(Input span) to input span ( )
*1
Low limit alarm
–(Input span) to input span ( )
*1
High/Low limits alarm
0 to input span ( )
*1
High/Low limit range alarm
0 to input span ( )
*1
Process high alarm
Input range low limit value to input range high limit value *2
Process low alarm
Input range low limit value to input range high limit value *2
High limit alarm with standby –(Input span) to input span ( )
*1
Low limit alarm with standby –(Input span) to input span ( )
*1
High/Low limits with standby 0 to input span ( )
*1
• When input has a decimal point, negative low limit value is –199.9, and positive high limit value is 999.9.
• All alarm types except process alarm are deviation setting from the SV.
*1: For DC input, input span is the same as the scaling span.
*2: For DC input, input range low (or high) limit value is the same as scaling low (or high) limit value.
6
5.3 Auxiliary function setting mode 1
Character
Name, Description, Setting range
(PV display)
Default value
(SV display)
Set value lock selection
Unlock
• Locks the set value to prevent setting errors.
The setting item to be locked depends on the selection.
• If Lock 1 or Lock 2 is selected, PID auto-tuning or auto-reset cannot be carried out.
•
(Unlock): All set values can be changed.
(Lock 1): None of set values can be changed.
(Lock 2): Only main setting mode can be changed.
(Lock 3): All set values except input type and Controller/Converter function
can be changed. However, they return to their previous value after power is
turned off because they are not saved in the non-volatile memory. Be sure to
select Lock 3 when changing the set values frequently via communication
function, (If the value set by the communication function is the same as the
value before the setting, the value will not be written in the non-volatile memory.)
Do not change any setting item in Auxiliary function setting mode 2. If any item in
the mode is changed, it will affect other setting items such as SV and Alarm value.
Sensor correction setting
0.0
• Sets the sensor correction value for the sensor.
• Thermocouple, RTD input: –100.0 to 100.0 ( )
DC voltage, current input: –1000 to 1000 (The placement of the decimal
point follows the selection)
Communication protocol selection
• Selects the communication protocol.
• Available only when Serial communication (option) is applied.
is indicated
• Not available if
• Modbus ASCII mode:
, Modbus RTU mode:
Instrument number setting
0
• Sets the instrument number. (Communication cannot be carried out unless an
instrument number is individually set when communicating by connecting plural
instruments in serial communication.)
• Available only when Serial communication (option) is added.
• 0 to 95
Communication speed selection
9600bps
• Selects a speed to be equal to the speed of the host computer.
• Available only when Serial communication (option) is added.
• 2400bps:
, 4800bps:
, 9600bps:
, 19200bps:
Parity selection
Even parity
• Selects the parity.
• Not available if Serial communication (option) is not added or if
is selected during the Communication protocol selection.
• No parity:
, Even parity:
, Odd parity:
Stop bit selection
1
• Selects the stop bit.
• Not available if Serial communication (option) is not added or if
is selected during the Communication protocol selection.
• 1 or 2
5.4 Auxiliary function setting mode 2
Character
Default value
Name, Description, Setting range
(PV display)
(SV display)
Input type selection
K
• The input type can be selected from thermocouple (10 types), RTD
(–200 to 1370 )
(2 types), DC current(2 types) and DC voltage(4 types), and the unit / can be selected.
K
–200 to 1370 :
K
–320 to 2500 :
–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 750.0 :
N
–200 to 1300 :
N
–320 to 2300 :
PL0 to 1390 :
PL0 to 2500 :
C (W/Re5-26) 0 to 2315 :
C (W/Re5-26) 0 to 4200 :
Pt100
–199.9 to 850.0 :
Pt100
–199.9 to 999.9 :
7
JPt100
–199.9 to 500.0 :
JPt100 –199.9 to 900.0 :
Pt100
–200 to 850 :
Pt100
–300 to 1500 :
JPt100
–200 to 500 :
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.
• Available only for DC input
• Scaling low limit value to input range high limit value
(The placement of the decimal point follows the selection.)
Scaling low limit setting
–200
• Sets the scaling low limit value.
• Available only for DC input
• Input range low limit value to scaling high limit value
(The placement of the decimal point follows the selection.)
Decimal point place selection
No decimal point
• Selects decimal point place.
• 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 set value is too large, it affects control result due to the delay of response)
• 0.0 to 10.0 seconds
OUT high limit setting
100%
• Sets OUT high limit value.
• Not available for ON/OFF action.
• OUT low limit value to 105%
(Setting higher than 100% is effective to DC current output type)
OUT low limit setting
0%
• Sets OUT low limit value.
• Not available for ON/OFF action.
• –5% to OUT high limit value
(Setting less than 0% is effective to DC current output type)
OUT ON/OFF action hysteresis setting
1.0
• Sets OUT ON/OFF action Hysteresis.
• Available only when the control action is ON/OFF action
• Thermocouple, RTD input: 0.1 to 100.0 ( )
DC input: 1 to 1000 (The placement of the decimal point follows the selection)
Alarm type selection
No alarm action
• Selects an alarm type.
No alarm action
:
Process high alarm
:
High limit alarm
:
Process low alarm
:
Low limit alarm
:
High limit alarm with standby
:
High/Low limits alarm
:
Low limit alarm with standby
:
High/Low limit range alarm:
High/Low limits alarm w/standby:
Alarm action Energized/Deenergized selection
Energized
• Selects the alarm action Energized/Deenergized.
• Not available if No alarm action is selected during the Alarm type selection.
• Energized:
Deenergized:
Alarm HOLD function selection
Alarm Not Holding
• Selects either [Holding] or [Not Holding] of alarm HOLD function.
If alarm HOLD function is set to [Holding], once the alarm functions, alarm output
remains until the power is turned off.
• Not available if No alarm action is selected during the Alarm type selection
• Alarm Not Holding:
Alarm Holding:
Alarm hysteresis setting
1.0
• Sets the alarm hysteresis.
• Not available if No alarm action is selected during the Alarm type selection
• Thermocouple, RTD input: 0.1 to 100.0 ( )
DC input: 1 to 1000 (The placement of the decimal point follows the selection)
8
Alarm action delayed timer setting
0 seconds
• Sets the alarm action delayed time.
When the setting time has passed after the input enters alarm output range, the
alarm is activated.
• Not available if No alarm action is selected during the Alarm type selection.
• 0 to 9999 seconds
Direct/Reverse control action selection
Reverse (Heating) action
• Selects either Reverse (Heating) or Direct (Cooling) control action.
• Reverse (Heating) action :
Direct (Cooling) action
:
AT bias setting
20
• Sets bias value during PID auto-tuning.
• Not available for the DC voltage or current input
• 0 to 50 (0 to 100 ) or 0.0 to 50.0 (0.0 to 100.0 )
Output status selection when input abnormal
Output OFF
• Selects the output status of OUT when DC input is overscale or underscale.
See “Input abnormality indication” on page 18.
• Available only for DC current output with DC input
•
: OFF(4mA) or OUT low limit
: Outputs a value between OFF (4mA) and ON (20mA) or between OUT low
limit value and OUT high limit value, depending on a deviation.
Controller/Converter function selection
Controller function
• Selects either controller or converter function.
• Available only when the control output is DC current output type.
• Controller function:
Converter function:
ARW function
ARW (Anti-reset windup) prevents overshoot caused by the integral action. The smaller the ARW value, the less
the overshoot caused by the integral action in the transition status, however it takes time until stabilization.
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 temperatures (input value) do not concur.
In such a case, the control can be set at the desired temperature by adjusting the input value of sensors.
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
SV setting
+ A1 set point
+ A1 set point
High limit alarm (When Energized is set)
High limit alarm (When Deenergized is set)
(Fig. 5.4-1)
(Fig. 5.4-2)
5.5 Output MV (manipulated variable) indication
Name and Description
Output MV (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 appears, 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
flashes in 0.5 second cycles)
If the
key is pressed again, the unit reverts to the PV/SV display mode.
9
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 parameters and values which has been set by converter function to
the values 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 input) value to “4 to 20mA DC” using the control parameter of the controller, and outputs it.
When this instrument is used as a converter, follow steps (1) to (7) described below.
After steps (1) to (7) are finished, this instrument can be used as a converter.
(1) Wire this controller (Power supply, Input and Output).
(2) Turn the power of this controller ON.
and
key (for approx. 3sec).
(3) Enter “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 (
)”.
(7) Select “Converter (
)” from “Controller/Converter function selection (
)”.
• To activate the alarm action by Converter function, set the alarm type to Process alarm.
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
SV
Proportional band
Integral time
Derivative time
Manual reset setting
Set value
Scaling low limit
100.0%
0 seconds
0 seconds
0.0
Setting item
Alarm value setting
Loop break alarm action time
Loop break alarm action span
Direct/Reverse action selection
Set value
0
0 seconds
0
Direct action
7. Running
After mounting and wiring in the control panel (DIN rail) are completed, operate the unit following the
procedures below.
(1) Turn the power supply to the KT7 Series ON.
For approx. 3sec after power is turned on, the character of the sensor type and temperature unit are
indicated on the PV display, and the input range high limit value is indicated on the SV display.
(If any other value is set during 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 SV (main set value).
(2) Input each set value.
Input each set value, referring to “5. Setup”.
(3) Turn the load circuit power ON.
Control action starts so as to keep temperature of the control target at the SV.
10
8. Operation flowchart
Alarm setting procedure
(Numbers (1) to (6) are indicated on the flowchart.)
Outline of operation procedure
[Step 3 Lock setting]
: Set the Set value Lock in Auxiliary function setting
mode 1 (If Step 3 is not necessary, skip this step.)
(1) [Alarm type]: Select an alarm type
(If an alarm type except for
is selected, items (2) to (6)
are indicated and they can be set if necessary.
(2) [Alarm action Energized/Deenergized]: Select Alarm contact output
) or OFF (Deenergized:
).
ON (Energized:
(3) [Alarm HOLD function]: Select the alarm output Holding or Not Holding.
(4) [Alarm hysteresis]: Set the Alarm hysteresis.
(5) [Alarm action delayed timer]: Set Alarm action delayed time.
(If input enters alarm action range and setting time has passed,
the alarm is activated.)
(6) [Alarm value]: Set action point of Alarm output.
[Step 4 Run setting]
: Set the SV(desired value) in the Main setting mode.
[Note]
Operation before running
[Step 1 Initial setting] : Set Input type, Alarm type, control action, etc.
in Auxiliary function setting mode 2.
[Step 2 Adjusting item] : Set PID values and Alarm value in the Sub setting
mode.
If an alarm type is changed, the alarm set value
becomes 0 (0.0). Therefore it is necessary to reset it.
Press the
key.
PV/SV display
Output MV indication
Press the
key
for approx. 3sec.
Press the
key.
Press the
[Main setting mode]
SV
Press
key.
[Sub setting mode]
SV (Desired value)
PV
key while holding down the
[Auxiliary function setting mode 1]
AT
• If AT is cancelled during the process,
SV
PID values revert to previous value.
Selection
PV
SV
Set value lock
PV
SV
Selection
OUT proportional
band
Reverts to PV/SV display.
PV
,
keys.
• Set the value with
• ON/OFF action when set to 0 or 0.0
SV
,
keys.
• Set the value with
• PD action when set to 0, and autoSV
reset can be performed.
Set value
PV
key
Sensor correction
PV
SV
Set value
Communication protocol
: This means that
if
PV
is pressed, the set
• Make a selection with
,
keys.
• If Lock 1 or Lock2 is selected,
AT or Auto-reset does not work.
• Be sure to designate Lock 3 when
using Serial communication.
Set value
Integral time
Explanation of
.
for approx. 3sec while holding down
,
keys.
• Set the value with
• Setting the value to 0 disables the
SV
function.
Set value
SV
Selection
• Set the value with
,
• Make a selection with
• Not available for
keys.
,
keys.
indication
Derivative time
value is saved, and the
controller proceeds to the
next setting item.
PV
Instrument number
PV
ARW
PV
SV
Set value
,
• Set the value with
• Available for PID action
SV
Set value
• Set the value with
,
keys.
keys.
Communication speed • Make a selection with
SV
keys.
Selection
,
PV
• Set the value with
,
keys.
• Not available for DC current output or
SV
when OUT is ON/OFF action
Set value
OUT proportional
cycle
PV
Parity
PV
SV
Selection
• Set the value with
,
keys.
• Not available when OUT2 is ON/OFF
SV
action
Set value
,
keys.
•Make a selection with
• Not available if
is selected
during Communication protocol
selection
Manual reset
PV
Stop bit
PV
SV
Selection
(6)
PV
• Set the value with
,
keys.
Alarm value
is selected
• Not available if
SV
during Alarm action selection
Set value
• Make a selection with
,
keys.
• Not available if
is selected
during Communication protocol
selection
Reverts to the PV/SV display.
Heater burnout alarm value • Set the value with
PV
.
SV
Set value
,
keys.
• Setting the value to 0.0 disables the function.
Loop break alarm
action time
PV
• Set the value with
,
keys.
• Setting the value to 0 disables the
SV
function.
Set value
Loop break alarm
action span
PV
• Set the value with
,
keys.
• Setting the value to 0 disables the
SV
function.
Set value
Reverts to the PV/SV display.
11
Setting items with dotted lines are optional
and they appear only when the options are
added.
9. Action explanation
9.1 OUT action
Heating (Reverse) action
Cooling (Direct) action
Proportional band
Proportional band
ON
ON
Control
action
OFF
OFF
SV setting
SV setting
3
3
3
3
3
3
4
4
4
4
4
4
Relay contact
output
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
+ 3
0V DC
4
+ 3
12V DC
4
Cycle action is performed according to deviation
+ 3
4mA DC
4
0/12V DC
4
+ 3
4mA DC
4
4 to 20mA DC
4
+ 3
20mA DC
4
Changes continuously according to deviation
Changes continuously according to deviation
Lit
Unlit
Indicator
(OUT) Green
Unlit
Lit
: Acts ON or OFF.
9.2 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
+ 3
12V DC
4
+ 3
20mA DC
4
0V DC
4
+ 3
0V DC
4
+ 3
4mA DC
4
4mA DC
4
12V DC
4
+ 3
20mA DC
4
Indicator
(OUT) Green
Lit
Unlit
: Acts ON or OFF.
12
Unlit
Lit
Alarm type
High limit alarm: The alarm action is deviation setting from the SV. The alarm is activated
if the input value reaches the high limit set value. Character indication:
Low limit alarm: The alarm action is deviation setting to the SV. The alarm is activated
if the input value goes under the low limit set value. Character indication:
High/Low limits alarm: Combines High limit and Low limit alarm actions. When input value
reaches high limit set value or goes under the low limit set value, the alarm is
activated. Character indication:
High/Low limit range alarm: When input value is between the high limit set value and low
limit set value, the alarm is activated. Character indication:
Process alarm: Within the scale range of the controller, alarm action points can be set
at random and if the input reaches the randomly set action point, the alarm is
activated.
Character indication: Process high alarm
, Process low alarm
Alarm with standby function: When the power to the controller is turned on, even if the input
enters the alarm action range, the alarm is not activated. (If the controller is
allowed to keep running, once the input exceeds the alarm action point, the
standby function will be released.)
Character indication:
High limit alarm with standby
:
Low limit alarm with standby
:
High/Low limits alarm with standby :
Input type (character indication) and range
K
–200 to 1370 :
K
–320 to 2500 :
–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 750.0 :
N
–200 to 1300 :
N
–320 to 2300 :
PL0 to 1390 :
PL0 to 2500 :
C(W/Re5-26) 0 to 2315 :
C(W/Re5-26) 0 to 4200 :
Pt100 –199.9 to 850.0 :
Pt100 –199.9 to 999.9 :
JPt100 –199.9 to 500.0 :
JPt100 –199.9 to 900.0 :
Pt100
–200 to 850 :
Pt100 –300 to 1500 :
JPt100 –200 to 500 :
JPt100
–300 to 900 :
4 to 20mA DC –1999 to 9999:
0 to 20mA DC –1999 to 9999:
0 to 1V DC
–1999 to 9999:
0 to 5V DC
–1999 to 9999:
1 to 5V DC
–1999 to 9999:
0 to 10V DC
–1999 to 9999:
Press the
key for approx. 3sec while holding down
the
key.
[Auxiliary function setting mode 2]
Input type
PV
SV
Selection
• Make a selection with
• Default value:
,
keys.
(5)
Alarm action delayed
timer
PV
Scaling high limit
PV
SV
Set value
• Set the value with
,
keys.
• Available for DC current, DC voltage input
Direct/Reverse control
PV
Scaling low limit
PV
SV
Set value
• Set the value with
,
keys.
• Available for DC current, DC voltage input
Decimal point place
SV
Selection
,
keys.
• Select the value with
• Available for DC current, DC voltage input
PV
• Set the value with
,
SV
Set value
• Set the value with
,
keys.
• Not available for ON/OFF action
OUT low limit
SV
Set value
SV
Set value
PV
(1)
(2)
(3)
SV
Set value
Alarm type
PV
SV
Selection
• Do not set this item even if
on the PV display.
Alarm HOLD function
SV
Selection
(4)
Alarm hysteresis
PV
SV
Set value
is indicated
,
keys.
• Make a selection with
• Available only when input is DC current and DC
SV
Selection
voltage with DC current output
SV
Selection
• Make a selection with
,
keys.
• Set the value with
• Not available for ON/OFF action
• Set the value with
,
• Available for ON/OFF action
• Make a selection with
• Default value:
Alarm action
• Make a selection with
Energized/Deenergized • Not available if
SV
PV
Selection
type selection
PV
keys.
• Set the value with
,
keys.
• Available for thermocouple, RTD input
Reverts to the PV/SV display.
OUT ON/OFF action
hysteresis
,
Controller/Converter
PV
PV
Set value
• Make a selection with
• Default value:
when input abnormal
Set value
OUT high limit
SV
,
keys.
is selected during Alarm
Output status selection
keys.
SV
PV
PV
Selection
Setting item not used
PV
PV filter time
constant
SV
AT bias
PV
PV
• Set the value with
• Not available if
SV
type selection
Set value
,
keys.
keys.
,
keys.
is selected during Alarm
• Make a selection with
• Not available if
type selection
,
keys.
is selected during Alarm
• Set the value with
• Not available if
type selection
,
keys.
is selected during Alarm
13
,
keys.
9.3 EVT (Alarm) action
High limit alarm
Low limit alarm
A1 hysteresis
Alarm
action
ON
A1 hysteresis
A1 hysteresis
ON
ON
OFF
OFF
OFF
A1 set point
+ A1 set point
SV
setting
High/Low limits alarm
A1 set point
High/Low limit range alarm
SV
setting
A1 set point
+ A1 set point
A1 hysteresis
ON
A1 set point
Process low alarm
Process high alarm
A1 hysteresis
SV
setting
A1 hysteresis
ON
ON
Alarm
action
OFF
OFF
A1 set point
SV
setting
OFF
A1 set point
A1 set point
High limit alarm with standby
A1 set point
Low limit alarm with standby
A1 hysteresis
ON
High/Low limit alarm with standby
A1 hysteresis
A1 hysteresis
ON
ON
Alarm
action
OFF
OFF
A1 set point
SV
setting
+ A1 set point
OFF
A1 set point
SV
setting
+ A1 set point
A1 set point
: Standby functions in this section.
Event (EVT) output indicator lights when output terminals 8 and 9 are connected (ON)
and goes off when they are not connected (OFF).
9.4 EVT (Heater burnout alarm) action
ON
Heater burnout
alarm action
OFF
Heater burnout alarm set point
Small
Large
Load current
Indicator
(EVT) Red
Lit
Unlit
: Event (EVT) output terminals 8 and 9 are connected (ON).
: Event (EVT) output terminals 8 and 9 are not connected (OFF).
Event (EVT) output indicator lights when output terminals 8 and 9 are connected (ON)
and goes off when they are not connected (OFF).
14
SV
setting
A1 set point
10. PID auto-tuning of this controller
In order to decide each value of P, I, D and ARW automatically, the auto-tuning process should be
made to fluctuate to obtain an optimal value.
Sometimes the auto-tuning process will not fluctuate if auto-tuning is performed at or near
room temperature. Therefore auto-tuning might not finish normally.
(A) In the case of a large difference between the SV and processing temperature as the
temperature is rising
When AT bias is set to 20 , the AT process will fluctuate at the temperature 20 lower than the SV.
Temperature 20
lower than the SV
SV
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
(4) AT bias value
(4)
Temperature
Time
AT starting point
(1)
(2)
(Fig. 10-1)
(3)
(B) When control is stable
The AT process will fluctuate around the SV.
SV
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
Temperature
Time
AT starting point
(1)
(Fig. 10-2)
(3)
(2)
(C) In the case of a large difference between the SV and processing temperature as the
temperature is falling
When AT bias is set to 20 , the AT process will fluctuate at the temperature 20 higher than the SV.
Temperature 20
higher than the SV
(1) Calculating PID constant
(2) PID constant calculated
(3) Controlled by the PID
constant set by auto-tuning
(4) AT bias value
Temperature
(4)
SV
Time
AT starting point
(1)
11. Specifications
(2)
(3)
(Fig. 10-3)
11.1 Standard specifications
Model
: Temperature controller
Mounting
: DIN rail mounting
Setting
: 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)
15
Input
Thermocouple
RTD
DC current
DC voltage
: K, J, R, S, B, E, T, N, PL- , C (W/Re5-26) External resistance; 100 or less
However, for thermocouple B, external resistance, 40 or less
: Pt100, JPt100, 3-wire system
Allowable input lead wire resistance (10 or less per wire)
: 0 to 20mA DC, 4 to 20mA DC, input impedance 50
[Connect 50 shunt resistor (AKT4811, sold separately) between input
terminals 5 and 6]
Allowable input current: 50mA or less
:
0 to 5V DC, 1 to 5V DC,
0 to 1V DC
0 to 10V DC
Input impedance
1M or more
100k or more
Allowable input voltage 5V or less
15V or less
Allowable signal source 2k or less
100 or less
resistance
Accuracy (Setting and Indication)
Thermocouple: Within 0.2% of input span 1 digit, or within 2 (4 ) whichever is greater
However, for R, S input, 0 to 200 (0 to 400 ): Within 6 (12 )
B input, 0 to 300 (0 to 600 ): Accuracy is not guaranteed.
K, J, E, T, N input, less than 0 (32 ): Within 0.4% of input span 1 digit
RTD
: Within 0.1% of input span 1 digit, or within 1 (2 ) whichever is greater
DC voltage : Within 0.2% of input span 1 digit
DC current : Within 0.2% of input span 1 digit
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%
Manual reset
: Proportional band converted value
Output limit
: 0 to 100% (DC current output type: –5 to 105%)
(Not available for ON/OFF action)
Hysteresis
: Thermocouple, RTD input: 0.1 to 100.0 ( )
DC voltage, current input: 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 cycles
Max. 40mA (Short circuit protected)
• Non-contact voltage (for SSR drive): 12+2
0 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
[Alarm, Loop break alarm and Heater burnout alarm (option) utilize common output terminals.]
The alarm action point is set by
deviation from the SV (excluding Process alarm)
and when input is out of the alarm setting range, alarm (EVT) turns ON or OFF (High/Low limit
range alarm). When Deenergized is selected in the Energized/Deenergized selection, alarm
(EVT) is activated conversely.
Setting accuracy : The same as indication accuracy
Action
: ON/OFF action
Hysteresis
: Thermocouple, RTD input: 0.1 to 100.0 ( )
DC voltage, current input: 1 to 1000 (The placement of the decimal
point follows the selection)
Output
: Open collector, Control capacity 24V DC 0.1A (Max.)
Alarm type
: One alarm type is selectable from below by front keypad 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
16
Alarm Energized/Deenergized: Alarm (EVT) output Energized/Deenergized can be selected.
Alarm Energized Alarm Deenergized
Red (EVT) LED
Lights
Lights
EVT output
ON
OFF
Alarm HOLD function: Once the alarm is activated, alarm output is held until the power is
turned off.
• Loop break alarm output
[Loop break alarm, Alarm and Heater burnout alarm (option) utilize common output terminals.]
Detects heater burnout, sensor burnout and actuator trouble.
Setting range: Loop break alarm action time setting: 0 to 200 minutes
Loop break alarm action span setting
Thermocouple, RTD input: 0 to 150 ( ) or 0.0 to 150.0 ( )
DC voltage, current input : 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
When OUT is non-contact
voltage output or DC current
output, OUT is not insulated
from Communication.
CPU
Communication
Insulated
Power supply
1
2
OUT
3
4
Insulation resistance: 10M or more, 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 dimensions : 22.5 x 75 x 100mm (W x H x D)
Material
: Flame-resistant resin (Case)
Color
: Ash gray (Case)
Attached functions
[Set 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 an 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 maintains it on the same status as when the reference junction is located
at 0 (32 ).
[Warm-up indication]
After the power supply to the instrument is turned on, the sensor input characters and
temperature unit are indicated on the PV display and input range high limit value is indicated
on the SV display for 3 seconds.
For DC current, voltage input, the scaling high limit value is indicated.
[Burnout]
When the thermocouple or RTD input is burnt out, OUT is turned OFF and PV display flashes
“
” (for DC current output type, OUT low limit value).
17
[Input abnormality indication]
Controller/Converter function selection
Output status
Controller
Converter
Output status
selection when
input abnormal
Contents and
Indication
Overscale
Measured value
has exceeded
Indication range
high limit value.
"
" flashes.
Underscale
Measured value
has dropped
below Indication
range low limit
value.
"
" flashes.
OUT
Direct
action
ON (20mA)
or OUT high
limit value (*)
OFF (4mA)
or OUT low
limit value
OFF (4mA)
or
OUT low
limit value
Reverse action
OUT
Direct action
Reverse
action
OFF(4mA)
or
OUT low
limit value
ON (20mA)
or
OUT high
limit value
OFF (4mA)
or
OUT low
limit value
ON (20mA) or
OUT high
limit value (*)
OFF(4mA) or
OUT low
limit value
OFF(4mA)
or
OUT low
limit value
ON (20mA)
or
OUT high
limit value
[Output status selection when input abnormal] is available only for DC input and DC current output.
For other inputs and outputs except for DC input and DC current output, the output status will be
the same as when OFF is selected during [Output status selection when input abnormal].
(*): Outputs a value between OFF (4mA) and ON (20mA) or between OUT low limit value and
OUT high limit value, depending on deviation.
Thermocouple, RTD input
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 850.0
–209.0 to 850.0
–199.9 to 750.0
–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
–199.9 to 500.0
–199.9 to 550.0
–206.0 to 550.0
–200 to 500
–207 to 550
–207 to 550
JPt100
–199.9 to 900.0
–199.9 to 999.9
–211.0 to 999.9
–300 to 900
–312 to 1000
–312 to 1000
Indication range and Control range for thermocouple inputs except above:
Input range low limit value–50 (100 ) to input range high limit value+50 (100 )
DC current, voltage input
Indication range : [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
However, if the input value is out of the range –1999 to 9999, the PV
display flashes “
” or “
”.
Control range
: [Scaling low limit value – Scaling span x 1%] to [Scaling high limit value
+ Scaling span x 10%]
DC input disconnection: When DC input is disconnected, PV display flashes “
” for 4 to
20mA DC and 1 to 5V DC input, and “
” for 0 to 1V DC input.
For 0 to 20mA DC, 0 to 5V DC and 0 to 10V DC input, the PV display
indicates the value corresponding with 0mA or 0V input.
Accessories included: Instruction manual 1 copy
When Heater burnout alarm option is added: Wire harness 3m, 1 length
When Heater burnout alarm option is added:
For rating 5A, 10A, 20A
CT (AKT4815) 1 piece
For rating 50A
CT (AKT4816) 1 piece
Accessories sold separately: 50 shunt resistor (AKT4811) for DC current input 1 piece
11.2 Optional specifications
Heater burnout alarm (option)
Watches the heater current with CT (Current transformer) and detects the burnout.
This alarm is also activated when indication is overscale and underscale.
(To detect Heater burnout, a CT for 50A can also be used for 5A, 10A and 20A ratings, however, this
is not suitable for small ampere ratings due to a low degree of accuracy. For a 20A rating or less, use
a CT designated for 20A.)
18
Heater burnout alarm (option), Loop break alarm and Alarm utilize common output terminals.
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)
Setting accuracy: 5% of the rated value
Action
: ON/OFF action
Output
: Open collector, Control capacity, 24V DC 0.1A (Max.)
Serial communication (option)
The following operations can be carried out from the external computer.
(1) Reading and setting of SV, PID and various set values
(2) Reading of the PV and action status (3) Change of the functions
Cable length
: Max. communication distance 1000m, Cable resistance; Within 50
Communication interface
: EIA RS-485
Communication method
: Half-duplex communication start-stop synchronous
Communication speed
: 2400, 4800, 9600, 19200bps (Selectable by keypad)
Parity
: Even, Odd and No parity (Selectable by keypad)
Stop bit
: 1, 2 (Selectable by keypad operation)
Communication protocol
: Modbus RTU, Modbus ASCII (Selectable by keypad)
Connectable number of units : Maximum 31 units to 1 host computer
Communication error detection: Parity, checksum (LRC, CRC)
12. Troubleshooting
If any malfunctions occur, refer to the following items after checking the power supply to the controller.
12.1 Indication
Problem
Presumed cause and solution
PV display is indicating • Control output OFF function is working.
[
].
Press the
key for approx. 1 second to release the function.
• Burnout of thermocouple, RTD or disconnection of DC voltage (0 to 1V DC)
[
] is flashing on the
Change each sensor.
PV display.
How to check whether the sensor is burnt out
[Thermocouple]
If the input terminals of the instrument are shorted, and if a value
around room temperature is indicated, the instrument is likely to
be operating normally, however, the sensor may be burnt out.
[RTD]
If approx. 100 of resistance is connected to the input terminals
between A-B of the instrument and between B-B is shorted, and
if a value around 0 (32 ) is indicated, the instrument is likely to
be operating normally, however, the sensor may be burnt out.
[DC voltage (0 to 1V DC)]
If the input terminals of the instrument are shorted, and if a
scaling low limit value is indicated, the instrument is likely to be
operating normally, however, the signal wire may be disconnected.
• Check whether the input terminals of thermocouple, RTD or DC voltage
(0 to 1V DC) are securely mounted to the instrument input terminal.
Connect the sensor terminals to the instrument input terminals securely.
[
] is flashing on the
PV display.
• Check whether input signal source for DC voltage (1 to 5V DC) or
DC current (4 to 20mA DC) is disconnected.
How to check whether the input signal wire is disconnected
[DC voltage (1 to 5V DC)]
If the input to the input terminals of the instrument is 1V DC and if
a scaling low limit value is indicated, the instrument is likely to be
operating normally, however, the signal wire may be disconnected.
[DC current (4 to 20mA DC)]
If the input to the input terminals of the instrument is 4mA DC and
if a scaling low limit value is indicated, the instrument is likely to be
operating normally, however, the signal wire may be disconnected.
• Check whether input signal wire for DC voltage (1 to 5V DC) or DC current
(4 to 20mA DC) is securely connected to the instrument input terminals.
• Check if polarity of thermocouple or compensating lead wire is correct.
• Check whether codes (A, B, B) of RTD agree with the instrument terminals.
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The PV display keeps
indicating the value which
was set during Scaling low
limit setting.
The indication of PV display
is abnormal or unstable.
[
] is indicated on
the PV display.
12.2 Key operation
Problem
Unable to set SV, P, I, D,
proportional cycle, alarm
value, etc.
The values do not change
by the
,
keys.
The setting indication does
not change within the input
range even if the
,
keys are pressed, and
• Check whether the input signal source for DC voltage (0 to 5V DC,
0 to 10V DC) and DC current (0 to 20mA DC) is disconnected.
How to check whether the input signal wire is disconnected
[DC voltage (0 to 5V DC, 0 to 10V DC)]
If the input to the input terminals of the instrument is 1V DC and
if the value corresponding to 1V DC is indicated, the instrument
is likely to be operating normally, however, the signal wire may
be disconnected.
[DC current (0 to 20mA DC)]
If the input to the input terminals of the instrument is 1mA DC and
if the value corresponding to 1mA DC is indicated, the instrument
is likely to be operating normally, however, the signal wire may be
disconnected.
• Check whether the input lead wire terminals for DC voltage (0 to
5V DC, 0 to 10V DC) or DC current (0 to 20mA DC) are securely
mounted to the instrument input terminals.
• Check whether sensor input or temperature unit ( or ) is correct.
Select the sensor input and temperature unit ( or ) properly.
• Sensor correcting value is unsuitable. Set it to a suitable value.
• Check whether the specification of the sensor is correct.
• AC leaks into the sensor circuit. Use an ungrounded type sensor.
• There may be equipment that interferes with or makes noise near
the controller. Keep equipment that interferes with or makes
noise away from the controller.
• Internal memory is defective.
Please contact our agency or us.
Presumed cause and solution
• Set value lock (Lock 1 or Lock 2) is selected.
Release the lock selection.
• During PID auto-tuning or auto-reset
Cancel the auto-tuning if necessary.
Auto-reset ends 4 minutes after starting.
• Scaling high limit or low limit may be set at the point where the
value does not change.
Set it to a suitable value while in Auxiliary function setting
mode 2.
new values are unable to be set.
12.3 Control
Problem
Temperature does not rise.
The control output remains
in an ON status.
The control output remains
in an OFF status.
Presumed cause and solution
• Sensor is out of order. Replace the sensor.
• Check whether the sensor is securely mounted to the
instrument input terminal.
Check whether control output terminals are securely
mounted to the actuator input terminals.
Mount the sensor or control output terminal securely.
• Check whether the wiring of sensor or control output terminals is correct.
• OUT low limit value is set to 100% or higher in Auxiliary function
setting mode 2. Set it to a suitable value.
• OUT high limit value is set to 0% or less in Auxiliary function
setting mode 2. Set it to a suitable value.
• For all other malfunctions, please contact our main office or dealers.
Panasonic Electric Works Co., Ltd. Automation Controls Business Unit
Head Office : 1048 Kadoma, Kadoma-shi, Osaka 571-8686, Japan
Telephone : Japan (81) Osaka (06) 6908-1050
Facsimile : Japan (81) Osaka (06) 6908-5781
Pursuant to the directive 2004/108/EC, article 9(2)
Panasonic Electric Works Europe AG
Rudolf-Diesel-Ring 2 83607 Holzkirchen, Germany
This product has been developed / produced for industrial use only.
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