Panasonic KT8, KT9 User guide

COMMUNICATION INSTRUCTIONMANUALTEMPERATURECONTROLLER KT4,KT8 and KT9

No.KTC1E6 2009.05 To prevent accidents arising fromthe misuse ofthis controller, pleaseensure the operator receives thismanual. For this product to which communication function has been added, “1” is entered after the heater burnout alarm indication in the model number. (For the model numberand basic operation, referto the instruction manual for KT4, KT8 and KT9.)

Warning

Turn the power supply 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.

1. Setup of the KT4, KT8 and KT9

Set the items “Communication protocol selection”, “Instrument number setting”, “Communication speed selection” “Parity selection” and “Stop bit selection” after the “Sensor correction setting” in the Auxiliary function setting mode 1. To enter Auxiliary function setting mode 1, press the key for 3 seconds while holding down the

key.

Character

(PV display)

Name, Functions and Setting range

Communication protocol selection ModbusASCII

• Selects the Communication protocol.

• Modbus ASCII mode: Modbus RTU mode: : Not available.

Instrument number setting 0

• Sets individual instrument number for each unit when communicating by

connecting plural controllers in serial communication. Up to 31 units can be connected, however, the instrument number can be set

within the range 0 to 95.

• 0 to 95

Communication speed selection 9600bps

• Selects a communication speed to correspond to that of host computer.

• 2400bps: , 4800bps: , 9600bps: , 19200bps:

Parity selection Even

• Selects the parity.

• No parity: , Even parity: , Odd parity:

Stop bit selection 1

• Selects the stop bit.

• 1 or 2

Default

(SV display)

2. Terminal arrangement

2.1 Terminal arrangement of KT4

(Fig. 2.1-1)

OUT1 : Control output 1 (Heating output) OUT2 : Control output 2 (Cooling output) RELAY: Relay contact output V/A : DC voltage output /DC current

output S : Non-contact relay output A1 : Alarm 1 output EVT : Event output (ComprisesA2

output and Heater burnout

alarm output) CT : Current transformer input TC : Thermocouple RTD : Resistance Temperature Detector DC : DC current or DC voltage

RS-485: Serial communication

2.2 Terminal arrangement of KT8 and KT9

OUT1 : Control output 1 (Heating output) OUT2 : Control output 2 (Cooling output) RELAY: Relay contact output V/A : Non-contact voltage output /DC

current output A1 : Alarm 1 output A2 : Alarm 2 output HB : Heater burnout alarm output SV2 : 2nd main setting CT : Current transformer input TC : Thermocouple RTD : Resistance Temperature Detector DC : DC current or DC voltage RS-485: Serial communication

(Fig 2.2-1)

3. System configuration

RS-485 multi-drop connection communication

Host computer

RS-485

Host computer

RS-232C

No.0 No.1 No.2

Communication

converter

232C 485

(Fig. 3-1)

No.0

(Fig. 3-2)

RS-485

KT KT

No.1

No.30

PLC

RS-485

No.0 No.1 No.2

(Fig. 3-3)

No.30

4. Wiring

Shielded

When using communication converter (RS-232C)

• Connector: D-sub 25-pin Connection: RS-232C RS-485 (Communication speed: 2400, 4800, 9600, 19200bps)

Host computer

wire

D-sub 25-pin connector

(Fig. 4-1)

• Connector: D-sub 9-pin Connection: RS-232C RS-485 (Communication speed: 2400, 4800, 9600, 19200bps)

Host computer

wire

KT4

KT8, KT9

wire

D-sub 9-pin connector

When connecting with PLC (RS-485)

Connection: RS-485 RS-485 (Communication speed: 2400, 4800, 9600, 19200bps)

wire

(Fig. 4-2)

KT4 KT8, KT9

(Fig. 4-3)

Shielded wire

Connect only one side of the shielded wire to the FG or GND terminal so that current cannot flow to the shielded wire. (If both sides of the shielded wire are connected to the FG or GND terminal, the circuit will be closed between the shielded wire and the ground. As a result, current will run through the shielded wire and this may cause noise.) Be sure to ground FG and GND terminals.

Terminator (Terminal resistor)

Do not connect terminator with the communication line because each KT4, KT8 and KT9 has built-in pull-up and pull-down resistors instead of a terminator. If there is a large distance between the PLC and the KT4, KT8 and KT9, connect the terminator (120 or more resistance) on the PLC side.

Setup of the KT4, KT8, KT9

• It is necessary to set the instrument number individually to the KT4, KT8 and KT9 when

communicating by connecting plural units with serial communication. Select a communication speed of KT4, KT8 and KT9 in accordance with that of the host computer.

• For instrument number setting and communication speed selection, refer to the instruction manual

for KT4, KT8 and KT9.

Memory life of the KT4, KT8, KT9

The memory can contain up to 1,000,000 (one million) set value entries. This memory life is sufficient when the set value is changed by keypad operation. However, when changing the set value frequently via the communication function, be careful not to exceed the 1,000,000 (one million) times limit. When Lock 1 or Lock 2 is used, every time the set value is changed by the communication function, the changed value is written in the non-volatile memory. If the value changed by the communication function is the same as previous one, it is not written in the non-volatile memory. When Lock 3 is used and if the set value is changed, the changed value is not written in the non-volatile memory until the power to the controller is turned off. This has no relation to the limit for changes in set value.

Therefore, be sure to use Lock 3 when changing the set value frequently via communication.

SV2 of the KT8, KT9

If communication function is applied to KT8 and KT9, SV2 cannot be set by the command.

5. Communication procedure

Communication starts with command transmission from the host computer (hereafter Master) and ends with the response of the KT4, KT8, KT9 (hereafter Slave).

Master Slave

Command

Data

Command

Acknowledgement

Command

Negative

acknowledgement

Command

No response

(Fig.5-1)

• Response with data

When the master sends the reading command, the slave

responds with the corresponding set value or current action status.

• Acknowledgement

When the master sends setting command, the slave

responds by sending an acknowledgement after the processing is terminated.

• Negative acknowledgement

When the master sends non-existent command or value

out of the setting range, the slave returns a negative acknowledgement.

• No response

The slave will not respond to the master when broadcast

address is set, or when there is a communication error (framing error or parity error), or when LRC or CRC discrepancy is detected.

Communication timing of the RS-485

Slave side

When a slave starts transmission through the RS-485 communication line, the slave is arranged so as to provide an idle status (mark status) transmission period of 1 or more characters before sending the response to ensure the synchronization on the receiving side. The slave is arranged so as to disconnect the transmitter from the communication line within a 1 character transmission period after sending the response.

Master side (Notice on setting a program)

Set the program so that the master can disconnect the transmitter from the communication line within a 1 character transmission period after sending the command in preparation for reception of the response from the slave. To avoid the collision of transmissions between the master and the slave, send the next command after carefully checking that the master received the response.

6. Modbus protocol

6.1 Modbus protocol

Modbus protocol is a communication protocol for the PLC developed by Modicon Inc.

6.2 Transmission mode

There are 2 transmission modes (ASCII and RTU) in Modbus protocol.

6.3 ASCII mode

Hexadecimal (0 to 9,Ato F), which is divided into high order (4-bit) and low order (4-bit) out of 8-bit binary data in command is transmitted as ASCII characters. Data format Startbit : 1 bit

Data bit : 7 bits Parity : Even/No/Odd (Selectable) Stop bit : 1 bit/2 bits (Selectable) Error detection: LRC (Longitudinal Redundancy Check) Data interval : 1 second or less

(1) Message configuration

ASCII mode message is configured to start by [: (colon)(3AH)] and end by [CR (carriage return) (0DH) + LF (Line feed)(0AH)]. (See Fig. 6.3-1)

Header

(:)

(2) Slave address

Slave address is an individual instrument number on the slave side and is set within the range 00H to 5FH (0 to 95). The master identifies slaves by the slave address of the requested message. The slave informs the master which slave is responding to the master by placing its own address in the response message. [Slave address 00H (broadcast address) can identify all the slaves. However slaves do not respond.]

(3) Function code

Thefunction codeisthecommand code fortheslave to undertake thefollowingaction types (Table 6.3-1).

(Table 6.3-1)

Function code Contents

03 (03H) Reading the set value and information from slaves 06 (06H) Setting to slaves

Function code is used to discern whether the response is normal (acknowledgement) or if any error (negative acknowledgement) is occurred when the slave returns the response message to the master. When acknowledgement is returned, the slave simply returns the original function code. When negative acknowledgement is returned, the MSB of the original function code is set as 1 for the response. (For example, when the master sends request message setting 10H to function code by mistake, slave returns 90H by setting the MSB to 1, because the former is an illegal function.) For negative acknowledgement, exception code (Table 6.3-2) below is set to the data of response message and returned to the master in order to inform it that what kind of error has occurred.

Slave

address

Function

code

(Fig. 6.3-1)

Data

Error check

LRC

Delimiter

(CR)

Delimiter

(LF)

(Table 6.3-2)

Exception code Contents

1 (01H) Illegal function (Non-existent function) 2 (02H) Illegal data address (Non-existent data address)

3 (03H) Illegal data value (Value out of the setting range) 17 (11H) Illegal setting (Unsettable status) 18 (12H) Illegal setting (During setting mode by keypad operation, etc)

(4) Data

Data depends on the function code. A request message from the master is composed of data item, number of data and setting data. A response message from the slave is composed of number of bytes, data and exception code in negative acknowledgement. Effective range of data is –32768 to 32767 (8000H to 7FFFH).

(5) Error check of ASCII mode

After calculating LRC (Longitudinal Redundancy Check) from the slave address to the end of data, the calculated 8-bit data is converted to two ASCII characters and are appended to the end of message.

How LRC is calculated

Create a message in RTU mode.

Add all the values from the slave address to the end of data. This is assumed as X.

Make a complement for X (bit reverse). This is assumed as X.

Add a value of 1 to X. This is assumed as X.

Set X as an LRC to the end of the message.

Convert the whole message to ASCII characters.

(6) Message example of ASCII mode

Reading (Instrument number 1, SV)

• A request message from the master

Slave

address

(3AH)

1 2 2 4 4 2 2

(30H 31H)

Function

code

(30H 33H)

Data item

(30H 30H 30H 31H) (46H 41H)

Number of

data

(30H 30H 30H 31H)

Error check

LRC

DelimiterHeader

(0DH 0AH)

Number of characters

(Fig. 6.3-2)

The number of data means the data item to be read, and it is fixed as (30H 30H 30H 31H).

• Response message from the slave in normal status (When SV=100 )

Slave

(3AH)

1 2 2 2 4 2 2

address

(30H 31H)

Function

code

(30H 33H)

Number of

response bytes

(30H 32H)

(30H 30H 36H 34H)

Error check

LRC

(39H 36H) (0DH 0AH)

DelimiterHeader Data

Number of characters

(Fig.6.3-3)

The number of response bytes means the number of bytes of the data which has been read, and it is fixed as (30H 32H).

• Response message fromthe slave in exception (error) status (When non-existentdataitem issent)

Slave

address

(3AH)

1 2 2 2 2 2

(30H 31H) (38H 33H)

Function

code

Exception

code

(30H 32H)

(Fig. 6.3-4)

Error check

LRC

(37H 41H)

DelimiterHeader

(0DH 0AH)

Number of characters

The function code MSB is set to 1 for the response message in exception(error) status (83H). The exception code (02H: Non-existent data address) is returned.

Setting (Instrument number 1, SV=100 )

• A request message from the master

Slave

address

(3AH)

1 2 2 4 4 2 2

(30H 31H)

Function

code

(30H 36H)

Data item

(30H 30H 30H 31H)

Data

(30H 30H 36H 34H)

Error check

LRC

(39H 34H)

DelimiterHeader

(0DH 0AH)

Number of characters

(Fig. 6.3-5)

• Response message from the slave in normal status

Slave

address

(3AH) (30H 31H) (30H 36H)

1 2 2 4 4 2 2

Function

code

Data item

(30H 30H 30H 31H)(30H 30H 36H 34H) (39H 34H) (0DH 0AH)

Error check

LRC

DelimiterHeader Data

(Fig. 6.3-6)

• Response message from the slave in exception (error)status (When a value out of the setting range is set.)

Slave

address

(3AH) (30H 31H) (38H 36H) (30H 33H) (37H 36H) (0DH 0AH)

Function

code

Exception

code

(Fig. 6.3-7)

2221

Error check

LRC

DelimiterHeader

Number of

characters

The function code MSB is set to 1 for the response message in exception (error) status (86H). The exception code (03H: Value out of the setting range) is returned.

Number of characters

6.4 RTU mode

8-bit binary data in command is transmitted as it is. Data format Start bit : 1 bit

Data bit : 8 bits Parity : Even/No/Odd (Selectable) Stop bit : 1 bit/2 bits (Selectable) Error detection : CRC-16 (Cyclic Redundancy Check)

Data interval : 3.5 characters transmission time or less

(1) Message configuration

RTU mode is configured to start after idle time is processed for more than 3.5 character transmission and end after idle time is processed for more than 3.5 character transmission. (See Fig. 6.4-1)

3.5 idle

characters

Slave

address

Function

code

Data

Error check

CRC

3.5 idle

characters

(Fig. 6.4-1)

(2) Slave address

[Slave address 00H (broadcast address) can identify all the slaves. However slaves do not respond.]

(3) Function code

Thefunction codeis the commandcode forthe slave to undertakethe following action types (Table6.4-1).

(Table 6.4-1)

Function code Contents

03 (03H) Reading the set value and information from slaves 06 (06H) Setting to slaves

Function code is used to discern whether the response is normal (acknowledgement) or if any error (negative acknowledgement) is occurred when the slave returns the response message to the master. When acknowledgement is returned, the slave simply returns the original function code. When negative acknowledgement is returned, the MSB of the original function code is set as 1 for the response. (For example, when the master sends request message setting 10H to function code by mistake, slave returns 90H by setting the MSB to 1, because the former is an illegal function.) For negative acknowledgement, exception code (Table 6.4-2) below is set to the data of response message and returned to the master in order to inform it that what kind of error has occurred.

(Table 6.4-2)

Exception code Contents

1 (01H) Illegal function (Non-existent function) 2 (02H) Illegal data address (Non-existent data address)

3 (03H) Illegal data value (Value out of the setting range) 17 (11H) Illegal setting (Unsettable status) 18 (12H) Illegal setting (During setting mode by keypad operation, etc)

(4) Data

Data depends on the function code. A request message from the master side is composed of data item, number of data and setting data. A response message from the slave side is composed of number of bytes, data and exception code in negative acknowledgement. Effective range of data is –32768 to 32767 (8000H to 7FFFH).

(5) Error check of RTU mode

After calculating CRC-16 (Cyclic Redundancy Check) from the slave address to the end of data, the calculated 16-bit data is appended to the end of message in sequence from low order to high order.

How CRC is calculated

characters

In the CRC system, the information is divided by the polynomial series. The remainder is added to the end of the information and transmitted. The generation of the polynomial series is as follows. (Generation of the polynomial series: X16+ X15+ X2+ 1)

Initialize the CRC-16 data (assumed as X) (FFFFH).

Calculate exclusive OR (XOR) with the 1st data and X. This is assumed as X.

Shift X one bit to the right. This is assumed as X.

When a carry is generated as a result of the shift, XOR is calculated by X of

and the fixed value (A001H). This is assumed as X. If a carry is not generated, go to step5.

Repeat steps

XOR is calculated with the next data and X. This is assumed as X.

Repeat steps

Set X as CRC-16 to the end of message in sequence from low order to high order.

3 3

and

until shifting 8 times.

to5.

up to the last data.

(6) Message example of RTU mode

Reading (Instrument number 1, SV)

• A request message from the master

3.5 idle

characters

Slave

address

(01H) (03H) (0001H)

1 1 2 2 2

Function

code

Data item

Number of

data

(0001H) (D5CAH)

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-2)

The number of data means the data item to be read, and it is fixed as 0001H.

• Response message from the slave in normal status (When SV=100 )

3.5 idle

characters

Slave

address

(01H) (03H) (02H)

1 1 1 2 2

Function

code

Number of

response bytes

Data

(0064H) (B9AFH)

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-3) The number of response byte means number of bytes of the data which has been read, and it is fixed as 02H.

• Response message from the slave in exception (error)status (When non-existent data item is sent)

3.5 idle

characters

Slave

address

(01H) (83H) (02H) (C0F1H)

1 1 1 2

Function

code

Exception

code

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-4)

The function code MSB is set to 1 for the response message in exception(error) status (83H).

The exception code (02H: Non-existent data address) is returned.

Setting (Instrument number 1, SV=100 )

• A request message from the master

3.5 idle

characters

Slave

address

(01H) (06H) (0001H)

1 1 2 2 2

Function

code

Data item

Data

(0064H) (D9E1H)

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-5)

• Response message from the slave in normal status

3.5 idle

characters

Slave

address

(01H) (06H) (0001H)

1 1 2 2 2

Function

code

Data item

Data

(0064H) (D9E1H)

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-6)

• Responsemessagefrom the slave in exception (error)status (When a valueout of the settingrangeis set)

3.5 idle

characters

Slave

address

(01H) (86H) (03H) (0261H)

1 1 1 2

Function

code

Exception

code

Error check

CRC

3.5 idle

characters

Number of

(Fig. 6.4-7) The function code MSB is set to 1 for the response message in exception(error) status (86H). The exception code (03H: Value out of the setting range) is returned.

7. Communication command table

When the data (set value) has a decimal point, remove the decimal point and represent it as a whole number,then express it in hexadecimal figures.

Modbus

function code

03H/06H 0001H: SV1 Set value 03H/06H 0002H: Not used 03H/06H 0003H: AT/Auto-reset 0000H: Cancel 0001H: Perform 03H/06H 0004H: OUT1 proportional band Set value

03H/06H 0005H: OUT2 proportional band Set value 03H/06H 0006H: Integral time Set value 03H/06H 0007H: Derivative time Set value 03H/06H 0008H: OUT1 proportional cycle Set value 03H/06H 0009H: OUT2 proportional cycle Set value 03H/06H 000AH: Not used 03H/06H 000BH: A1 value Set value 03H/06H 000CH: A2 value Set value 03H/06H 000DH: Not used 03H/06H 000EH: Not used 03H/06H 000FH: HB (Heater burnout alarm) value Set value 03H/06H 0010H: LA (Loop break alarm) time Set value 03H/06H 0011H: LA (Loop break alarm) span Set value 03H/06H 0012H: Set value lock (*1) 0000H: Unlock 0001H: Lock 1

03H/06H 0013H: SV high limit Set value 03H/06H 0014H: SV low limit Set value 03H/06H 0015H: Sensor correction value Set value 03H/06H 0016H: Overlap/Dead band Set value 03H/06H 0017H: Not used 03H/06H 0018H: Scaling high limit Set value 03H/06H 0019H: Scaling low limit Set value

03H/06H 001AH: Decimal point place 0000H: XXXX (No decimal point)

03H/06H 001BH: PV filter time constant Set value 03H/06H 001CH: OUT1 high limit Set value 03H/06H 001DH: OUT1 low limit Set value 03H/06H 001EH: OUT1 ON/OFF action hysteresis Set value 03H/06H 001FH: OUT2 action mode 0000H: Air cooling

03H/06H 0020H: OUT2 high limit Set value 03H/06H 0021H: OUT2 low limit Set value 03H/06H 0022H: OUT2 ON/OFF action hysteresis Set value 03H/06H 0023H: A1 type (*2)

0024H: A2 type (*2)

03H/06H 0025H: A1 hysteresis Set value 03H/06H 0026H: A2 hysteresis Set value 03H/06H 0027H: Not used 03H/06H 0028H: Not used 03H/06H 0029H: A1 action delayed timer Set value 03H/06H 002AH: A2 action delayed timer Set value

Data item Data

0002H: Lock 2 0003H: Lock 3

0001H: XXX.X (1 digit after decimalpoint) 0002H: XX.XX (2 digitsafterdecimal point) 0003H: X.XXX (3 digitsafterdecimal point)

0001H: Oil cooling 0002H: Water cooling

0000H: No alarm action 0001H: High limit alarm 0002H: Low limit alarm 0003H: High/Low limits alarm 0004H: High/Low limit range alarm 0005H: Process high alarm 0006H: Process low alarm 0007H: High limit alarm with standby 0008H: Low limit alarm with standby 0009H: High/Low limits alarm with

standby

03H/06H 002BH: Not used 03H/06H 0036H: Not used

03H/06H 0037H: OUT/OFF 0000H: OUT 0001H: OFF 03H/06H 0038H: Auto/Manual control 0000H: Automatic control

0001H: Manual control

03H/06H 0039H: Manual control MV (manipulated

variable)

03H/06H 003AH: Not used 03H/06H 003FH: Not used

03H/06H 0040H: A1 action Energized/Deenergized 0000H: Energized 03H/06H 0041H: A2 action Energized/Deenergized 0000H: Energized 03H/06H 0042H: Not used

03H/06H 0043H: Not used 03H/06H 0044H: Input type 0000H: K [–200 to 1370 ]

03H/06H 0045H: Direct/Reverse action 0000H: Heating (Reverse action) 03H/06H 0046H: Not used

03H/06H 0047H: AT bias Set value 03H/06H 0048H: ARW (anti-reset windup) Set value 03H/06H 006FH: Key Lock 0000H: Key enabled 0001H:Key Lock

06H 0070H: Key operation change flag clearing 0000H:No action 0001H: All clearing 03H 0080H: PV reading Present PV (input value) 03H 0081H: OUT1 MV reading Present MV (manipulated variable) 03H 0082H: OUT2 MV reading Present MV (manipulated variable)

Set value

0001H: Deenergized 0001H: Deenergized

0001H: K [–199.9 to 400.0 ] 0002H: J [–200 to 1000 ] 0003H: R [0 to 1760 ] 0004H: S [0 to 1760 ] 0005H: B [0 to 1820 ] 0006H: E [–200 to 800 ] 0007H: T [–199.9 to 400.0 ] 0008H: N [–200 to 1300 ] 0009H: PL- [0 to 1390 ] 000AH: C (W/Re5-26) [0 to 2315 ] 000BH: Pt100 [–199.9 to 850.0 ] 000CH: JPt100 [–199.9 to 500.0 ] 000DH: Pt100 [–200 to 850 ] 000EH: JPt100 [–200 to 500 ] 000FH: K [–320 to 2500 ] 0010H: K [–199.9 to 750.0 ] 0011H: J [–320 to 1800 ] 0012H: R [0 to 3200 ] 0013H: S [0 to 3200 ] 0014H: B [0 to 3300 ] 0015H: E [–320 to 1500 ] 0016H: T [–199.9 to 750.0 ] 0017H: N [–320 to 2300 ] 0018H: PL- [0 to 2500 ] 0019H: C (W/Re5-26) [0 to 4200 ] 001AH: Pt100 [–199.9 to 999.9 ] 001BH: JPt100 [–199.9 to 900.0 ] 001CH: Pt100 [–300 to 1500 ] 001DH: JPt100 [–300 to 900 ] 001EH: 4 to 20mA DC [–1999 to 9999] 001FH: 0 to 20mA DC [–1999 to 9999] 0020H: 0 to 1V DC [–1999 to 9999] 0021H: 0 to 5V DC [–1999 to 9999] 0022H: 1 to 5V DC [–1999 to 9999] 0023H: 0 to 10V DC [–1999 to 9999]

0001H: Cooling (Direct action)

03H 0083H: Not used 03H 0084H: Not used 03H 0085H: OUT status reading

03H 0086H: Not used 03H 0087H: Not used 03H 00A0H: Not used 03H 00A1H: Instrument information reading

0000 0000 0000 0000

to 2

20digit: OUT1

0: OFF 1: ON

21digit: OUT2

0: OFF 1: ON

22digit: A1 output

0: OFF 1: ON

23digit: A2 output

0: OFF 1: ON 24digit: Not used (Always 0) 25digit: Not used (Always 0) 26digit: HB (Heater burnout alarm)

output 0: OFF 1: ON (When sensor burnout, 0: OFF)

27digit: LA (Loop break alarm) output

0: OFF 1: ON

28digit: Overscale

0: OFF 1: ON

29digit: Underscale

0: OFF 1: ON

210digit: OUT/OFF selection

0: OUT 1: OFF

211digit: AT/Auto-reset

0: OFF 1: ON

212digit: OUT/OFF keyfunction selection

0: OUT/OFF

1: Auto/Manual 213digit: Not used (Always 0) 214digit: Auto/Manual control

0: Automatic 1: Manual

215digit: Key operation change

0: No 1: Yes

0000 0000 0000 0000

to 2

20digit: Not used (Always 0) 21digit: Cooling action

0: Not applied 1: Applied

22digit: A1 function

0: Not applied 1: Applied

23digit: A2 function

0: Not applied 1: Applied 24digit: Not used (Always 0) 25digit: Not used (Always 0) 26digit: HB (Heater burnout alarm)

0: Not applied 1: Applied 27digit: LA (Loop break alarm)

0: Not applied 1: Applied 28to 215digit: Not used (Always 0)

(*1) When Lock 3 is designated, the set data is not saved in the memory.

This is why the set value reverts to the one before Lock 3 when power is turned OFF.

(*2) When alarm type is changed, the alarm set value reverts to the default value and

alarm output status is also initialized.

Notice

When data setting is changed by front keypad operation, the data that is related to the changed item is also changed automatically as shown in Example 1 below. However, when the data setting is changed by communication function, the related data does not change as shown in Example 2 below. (Only the changed data is altered.) (Example 1) SV high limit: 1370

SV : 1000 When SV high limit is changed to 800 by the front keypad operation, both SV high

limit and SV are changed to 800 .

(Example 2) SV high limit: 1370

SV : 1000 When SV high limit is changed to 800 by communication function, SV high limit is

changed to 800 , however, SV is maintained at the same temperature 1000 .

7. Specifications

Communication method : Half-duplex Cable length : Maximum communication distance 1000m

Cable resistance: Within 50 (Terminator is not necessary or

120 or more on PLC side.) Communication line : EIA RS-485 Connectable number of units: Maximum 31 units to 1 host computer Communication speed : 2400, 4800, 9600, 19200bps (Selectable by keypad operation) Synchronous system : Start-stop synchronous Code form :ASCII, binary Error detection : Parity check, Checksum (LRC, CRC) Error correction : Command request repeat system Data format Startbit : 1

Data bit : 7, 8 Parity : Even, Odd, No parity Stop bit : 1

8. Troubleshooting

If any malfunctions occur, refer to the following items after checking the power supply to the master and the slave.

• Problem: Communication failure Check the following

The connection or wiring of communication is not secure. Burnout or imperfect contact on the communication cable and the connector.

Communication speed of the slave does not coincide with that of the master. The data bit, parity and stop bit of the master do not accord with those of the slave. The instrument number of the slave does not coincide with that of the command. The instrument numbers are duplicated in multiple slaves. When communicating without using communication converter, make sure that the program is

appropriate for the transmission timing.

• Problem: Although communication is occurring, the response is 'exception code'.

Check the following

Check that a non-existent command code has not been sent. The setting command data exceeds the setting range of the slave. The controller cannot be set when functions such asAT is performing. The operation mode is under the front keypad operation setting mode.

For further inquiries, please consult our agency or the shop where you purchased the unit.

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.

Panasonic KT8, KT9 User guide

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User Manual