Panasonic KT4 series Instruction Manual

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Contents

Panasonic KT4 series Instruction Manual Manual pdf 19 page image

19Heating/Cooling control (OUT2)• OUT2 sideProportional band: 0.0 to 10.0 times OUT1 proportional band (ON/OFF action when set to 0.0)Proportional cycle: 1 to 120 seconds• Overlap band/Dead band setting rangeThermocouple, RTD inputs: –100.0 to 100.0 ( )DC current, DC voltage inputs: –1000 to 1000 (The placement of the decimal point follows the selection)• OUT2 output ON/OFF action hysteresis settingThermocouple, RTD inputs: 0.1 to 100.0 ( )DC current, DC voltage inputs: 1 to 1000 (The placement of the decimal point follows the selection)• Integral and derivative times are the same as those of OUT1.• OUT2 action mode selection functionAir cooling (linear characteristic), Oil cooling (1.5th power of the linear characteristic),Water cooling (2nd power of the linear characteristic)• Output: Non-contact relay, Control capacity; 0.3A 250V ACSerial communicationThe 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 functionsCable length : Max. communication distance 1000m, Cable resistance; Within 50Communication interface : EIA RS-485Communication method : Half-duplex communication start stop synchronousCommunication speed : 2400, 4800, 9600, 19200bps (Selectable by keypad operation)Parity : Even, Odd and No parity (Selectable by keypad operation)Stop bit : 1, 2 (Selectable by keypad operation)Communication protocol : Modbus RTU, Modbus ASCII (Selectable by keypad operation)Connectable number of units : Maximum 31 units to 1 host computerCommunication error detection: Parity, checksum (LRC, CRC)11. TroubleshootingIf any malfunctions occur, refer to the following items after checking the power supply to the controller.11.1 IndicationProblem Presumed cause and solutionPV display is indicating [ ]. • Control output OFF function is working.Press the key for approx. 1 second to release the function.[ ] is flashing on the PVdisplay.• Thermocouple, RTD or DC voltage (0 to 1V DC) is burnt out.Change each sensor.How to check whether the sensor is burnt out[Thermocouple]If the input terminal of the instrument is shorted, and if a valuearound room temperature is indicated, the instrument is likely tobe operating normally, however, sensor may be burnt out.[RTD]If approx. 100 of resistance is connected to the input terminalsbetween A-B of the instrument and between B-B is shorted, andif approximate 0 (32 ) is indicated, the instrument is likely to beoperating normally, however, the sensor may be burnt out.[DC voltage (0 to 1V DC)]If the input terminal of the instrument is shorted, and if a scalinglow limit value is indicated, the instrument is likely to be operatingnormally, 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 terminals.Connect the sensor terminal to the instrument input terminal securely.[ ] is flashing on the PVdisplay.• Check whether the input signal source of 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 terminal of the instrument is 1V DC and ifa scaling low limit value is indicated, the instrument is likely to beoperating normally, however, the signal wire may be disconnected.[DC current (4 to 20mA DC)]If the input to the input terminal of the instrument is 4mA DC andif a scaling low limit value is indicated, the instrument is likely to beoperating normally, however, the signal wire may be disconnected.• Check if the input signal wire of DC voltage (1 to 5V DC), DC current(4 to 20mA DC) is securely connected to the instrument input terminals.Connect the signal lead wire to the instrument input terminal securely .Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com

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