Optional Specifications; Troubleshooting; Indication - Panasonic KT2 Instruction Manual

External dimensions : 48 x 24 x 98.5mm (W x H x D)
Case (Material, Color) : Flame-resistant resin, Ash gray
Accessories included : Instruction manual 1 copy,
Accessories sold separately: Shunt resistor

11.2 Optional specifications

Heating/Cooling control (option)
OUT2 (Cooling) proportional band: 0.0 to 10.0 times OUT1 proportional band (ON/OFF action when
set to 0.0)
OUT2 (Cooling) Integral time and OUT2 (Cooling) derivative time are the same as those of OUT1
action.
OUT2 (Cooling) proportional cycle: 1 to 120 seconds
Overlap band/Dead band setting range
TC, RTD input: -100.0 to 100.0
DC current, voltage input: -1000 to 1000 (The placement of the decimal point follows the selection)
OUT2 (Cooling) output ON/OFF action hysteresis setting
TC, RTD input: 0.1 to 100.0
DC current, voltage input: 1 to 1000 (The placement of the decimal point follows the selection)
Output: Relay contact 1a, Control capacity 3A 250V AC (resistive load), 1A 250V AC (inductive load cosø=0.4)
Serial communication (option)
The following operations can be carried out from an external computer.
(1) Reading and setting of SV, PID values and each set value
(2) Reading of the PV (input value) and action status (3) Change of the functions
Communication method
Cable length
Communication line
Number of connectable units: Maximum 31 units
Communication speed
Synchronous system
Instrument number
Communication protocol
Code form
Error detection
Error correction
Data format

12. Troubleshooting

If any malfunctions occur, refer to the following items after checking the power supply to the controller.

12.1 Indication

Problem
The PV/SV display is
indicating [
The PV/SV display is
indicating [
The PV/SV display is
flashing [ ].
Terminal cover
( )
( )
: Half-duplex
: Maximum communication distance 1,000m
Cable resistance: Within 50
: EIA RS-485
: 9600bps (2400, 4800, 9600, 19200bps) Selectable by keypad
: Start-stop sychronization
: 0 (0 to 95) Selectable by keypad
: Modbus ASCII (Modbus ASCII, Modbus RTU) Selectable by keypad
: ASCII (Modbus ASCII), Binary (Modbus RTU) (*)
: Parity, LRC (Modbus ASCII), CRC (Modbus RTU) (*)
: Command request repeat system
Start bit : 1 bit
Parity: Even (Modbus ASCII), No parity (Modbus RTU) (*), Stop bit: 1 bit
(*): Automatically selected upon selecting the communication protocol.)
• Control output OFF function is working.
]. To release the function, press the
• This is program standby status.
"]. If Program control function is selected during OUT/OFF key functon
selection and if SV is selected during PV/SV indication selection,
" " is indicated during program standby.
If PV is selected during PV/SV indication selection, the PV is indicated.
• Burnout of Thermocouple, RTD or disconnection of DC voltage (0 to
1V DC). Change each sensor.
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 approximate 100
between A-B of the instrument and between B-B is shorted, and if
approximate 0
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.
Mounting frame 1 piece
1 piece (50 ) : AKT4810
1 piece : AKT2801
(The terminator is not necessary or
120 or more on the PLC side.)
Data bit: 7 bits (Modbus ASCII), 8 bits (Modbus RTU) (*)
Presumed cause and solution
of resistance is connected to the input terminals
(32 ) is indicated, the instrument is likely to be
29
key for approx. 1 second.