Panasonic KT4R Manual de uso y cuidado

COMMUNICATION INSTRUCTION MANUAL Temperature Controller KT4R

No. KT4RCE1 2015.06

This manual contains instructions for communication functions of the KT4R.

To prevent accidents arising from the misuse of this controller, please ensure the operator receives this manual.

For model number and basic operation, please read the User’s Manual for the KT4R.

Warning

Turn the power supply to the instrument off before wiring or checking.

Working on or touching the terminal with the power switched on may result in severe injury or death

due to electric shock.

1. System Configuration

1.1 When Using Communication Converter (sold separately)

(Fig. 1.1-1)

1.2 When Using a PLC

(Fig. 1.2-1)

Communication converter

(sold separately)

RS-232C RS-485

No. 1

No. 2

No. 31

KT4R

Host computer

No. 1

No. 2

No.

KT4R

PLC

485

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

2. Wiring

2.1 When Using Communication Converter (sold separately)

(Fig. 2.1-1)

2.2 When Using a PLC (RS-485)

(Fig. 2.2-1)

⑯YA(-)

⑰YB(+)

⑱SG

⑯YA(-)

⑰YB(+)

⑱SG

⑯YA(-)

⑰YB(+)

⑱SG

(-)

(+)

PLC KT4R

Shield wire

RXD

TXD

DCD

DTR

DSR

RTS

CTS

GND

RI 9

YA(-)

YB(+)

COM

⑯YA(-)

⑰YB(+)

⑱SG

⑯YA(-)

⑰YB(+)

⑱SG

⑯YA(-)

⑰YB(+)

⑱SG

KT4R

Shield wire Shield wire

Shield wire

D-sub 9-pin connector

RS-232C RS-485

Host computer Communication converter

(sold separately)

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

Shield wire

Connect only one end of the shield wire to the FG terminal so that current cannot flow to the shield wire.

If both ends of the shield wire are connected to the FG terminal, the circuit will be closed between the

shield wire and the ground. As a result, current will run through the shield wire, and this may cause noise.

Be sure to ground the FG terminal.

Recommended cable: OTSC-VB 2PX0.5SQ (made by Onamba Co., Ltd.) or equivalent (Use a twisted pair

cable).

Terminator (Terminal resistor)

The terminator is mounted at the end of the wire when connecting a personal computer to multiple peripheral

devices. The terminator prevents signal reflection and disturbance.

It is not necessary to connect a terminator to the communication line because the KT4R has built-in pull-up

and pull-down resistors.

For communication between the PLC and KT4R, terminators are not necessary. However, to reduce the risk

of reflection, connect a terminator to the PLC side.

Use a terminator of 120 or more.

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

3. Setting Communication Parameters

Set communication parameters in Engineering mode.

To enter Engineering mode, press and hold the and keys (in thatorder) for approx. 3secondsin RUNmode.

Use the or key for settings (or selections).

To register the set data, use the key.

The following outlines the procedure for communication parameter setting.

RUN mode

PV/SV Display

+ (3 sec)

Engineering mode

Set value lock

(Several times)

Communication protocol

Characters,

Factory Default Setting Item, Function, Setting Range

Communication protocol

• Selects the communication protocol.

• Selection item:

MEWTOCOL

Modbus ASCII

Modbus RTU

Modbus ASCII (KT4 command allocation)

Modbus RTU (KT4 command allocation)

Instrument number

• Sets the instrument number.

The instrument numbers should be set one by one when multiple instruments are

connected in Serial communication, otherwise communication is not possible.

• Setting range: 1 to 95 [Do not use 0 (zero) – 0 cannot be used as an instrument number.]

Communication speed

• Selects a communication speed equal to that of the host computer.

• Selection item:

9600 bps

19200 bps

38400 bps

Data bit/Parity

• Selects the data bit and parity.

• Selection item:

8 bits/No parity

7 bits/No parity

8 bits/Even

7 bits/Even

8 bits/Odd

7 bits/Odd

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Characters,

Factory Default Setting Item, Function, Setting Range

Stop bit

• Selects the stop bit.

• Selection item:

1 bit

2 bits

Response delay time

• Response from the controller can be delayed after receiving command from the host

computer.

• Setting range: 0 to 1000 ms

(Many times)

RUN mode

PV/SV Display

Now, settings are complete.

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

4. MEWTOCOL

4.1 Communication Procedure

Communication starts with command transmission from the host computer, and ends with the response

of the KT4R (controller).

4.1.1 Response with Data

When the host computer sends the Read command,

the KT4R responds with the corresponding set value

or current status.

(Fig. 4.1.1-1)

4.1.2 Acknowledgement

When the host computer sends the Write command,

the KT4R responds by sending acknowledgement

after processing is terminated.

(Fig. 4.1.2-1)

4.1.3 Negative Acknowledgement

When the host computer sends a non-existent

command or value out of the setting range, the KT4R

returns a negative acknowledgement.

(Fig. 4.1.3-1)

4.2 Communication Timing of the RS-485

Master side (Take note while programming)

When the master starts transmission through the RS-485 communication line, the master is arranged so

as to provide an idle status (mark status) transmission period of 1 character or more before sending the

command to ensure synchronization on the receiving side.

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 collision of transmissions between the master and the slave, send the next command after

carefully checking that the master has received the response.

If a response to the command is not returned due to communication errors, set the Retry Processing to

send the command again. (It is recommended to execute Retry twice or more.)

Slave side

When the 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 ms or more (*) before sending a response

to ensure 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.

(*) Can be set in [Response delay time (p.5.)] within a range of 0 to 1000 ms.

Read command

Response data

Host computer KT4R

Write command

Acknowledgement

Host computer KT4R

Non-existent command or

data out of the setting range

Negative acknowledgement

Host computer KT4R

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4.3 Data Format

Data format is shown below.

Start bit B1 B2 B3 B4 B5 B6 B7 B8 Parity Stop bit

Start bit 1 bit

Data bit 7 bits/8 bits

Parity Even parity/Odd parity/No parity

Stop bit 1 bit/2 bits

4.4 Command Structure

All commands are composed of ASCII, and have the following structures.

Numerals written above the command represent the number of characters.

4.4.1 RCP Command Structure

Contact Area Read

Reads ON/OFF status of multiple contacts (R only).

8 points to 1 command can be specified.

Command

1 2 1 3 1 1 4

% # RCP R

25H Address

(Decimal) 23H 52H 43H 50H

Number of

contacts n

(1 to 8) 52H Contact No.

(1)

101100103102101160

1 4 2 1

R CR

52H Contact No.

(n) BCC 0DH

103102101160161160

Acknowledgement

1 2 1 2 1 1 2 1

% $ RC CR

25H Address

(Decimal) 24H 52H 43H Contact data

(1) Contact data

(n) BCC 0DH

101100161160

Negative acknowledgement

1 2 1 2 2 1

% ! CR

25H Address

(Decimal) 21H Error code

(Hexadecimal) BCC 0DH

101100161160161160

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4.4.2 WCP Command Structure

Contact Area Write

Multiple contacts (R only) are set to ON/OFF.

8 points to 1 command can be specified.

Command

1 2 1 3 1 1 4 1

% # WCP R

25H Address

(Decimal) 23H 57H 43H 50H

Number of

contacts n

(1 to 8) 52H Contact No.

(1) Contact data

(1)

101100103102101160

1 4 1 2 1

R CR

52H Contact No.

(n) Contact data

(n) BCC 0DH

103102101160161160

Acknowledgement

1 2 1 2 2 1 ・・・Number of characters

% $ WC CR

25H Address

(Decimal) 24H 57H 43H BCC 0DH

101100161160

Negative acknowledgement

1 2 1 2 2 1 ・・・Number of characters

% ! CR

25H Address

(Decimal) 21H Error code

(Hexadecimal) BCC 0DH

101100161160161160

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4.4.3 RD Command Structure

Data Area Read

Reads contents of data area (DT area only).

16 pieces of data to 1 command can be specified.

Command

1 2 1 2 1 5

% # RD D

25H Address

(Decimal) 23H 52H 44H 44H Starting data No.

( Decimal)

101100104103102101100

5 2 1

Ending data No.

(Decimal) BCC 0DH

104103102101100161160

Acknowledgement

1 2 1 2 4 4

% $ RD

25H Address

(Decimal) 24H 52H 44H Starting data

(Hexadecimal) Ending data

(Hexadecimal)

101100161160163162161160163162

Low High Low High 2 1

BCC 0DH

161160

Negative acknowledgement

1 2 1 2 2 1

% ! CR

25H Address

(Decimal) 21H Error code

(Hexadecimal) BCC 0DH

101100161160161160

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4.4.4 WD Command Structure

Data Area Write

Writes data to data area (DT area only).

16 pieces of data to 1 command can be specified.

Command

1 2 1 2 1 5 5

% # WD D

25H Address

(Decimal) 23H 57H 44H 44H Starting data No.

(Decimal) Ending data No.

(Decimal)

101100104103102101100104103102101100

4 4 2 1

Write Starting data

(Hexadecimal) Write Ending data

(Hexadecimal) BCC 0DH

161160163162161160163162161160

Low High Low High

Acknowledgement

1 2 1 2 2 1

% $ WD CR

25H Address

(Decimal) 24H 57H 44H BCC 0DH

101100161160

Negative acknowledgement

1 2 1 2 2 1

% ! CR

25H Address

(Decimal) 21H Error code

(Hexadecimal) BCC 0DH

101100161160161160

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]

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