Panasonic KT4R Use and care manual

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.
31
KT4R
PLC
RS
-
485
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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)
FG
FG
FG
⑯YA(-)
⑰YB(+)
⑱SG
⑯YA(-)
⑰YB(+)
⑱SG
⑯YA(-)
⑰YB(+)
⑱SG
(-)
(+)
PLC KT4R
Shield wire
Shield wire
Shield wire
RXD
TXD
DCD
DTR
DSR
RTS
CTS
2
3
5
1
4
6
7
8
GND
RI 9
FG
FG
FG
FG
YA(-)
YB(+)
COM
RX
TX
COM
⑯YA(-)
⑰YB(+)
⑱SG
⑯YA(-)
⑰YB(+)
⑱SG
⑯YA(-)
⑰YB(+)
⑱SG
KT4R
Shield wire Shield wire
Shield wire
Shield wire
D-sub 9-pin connector
RS-232C RS-485
Host computer Communication converter
(sold separately)
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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.
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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.
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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
CR 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
CR
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
CR 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
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