Omron CJ1W-SCU22, Руководство по эксплуатации, Страница: 375 / 478

R-41
A Standard System Protocol
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
R-3 Mitsubi
s
h
i Co
mputer
Link
Ma
ster
(A-c
o
m
pati
b
le
1C
Fra
m
e
, Model
1)
Re
f
R
-3-1
Comm
unications Specifications
R-3 Mitsubishi Computer Link Master
(A-compatible 1C Frame, Model 1)
The Mitsubishi Computer Link Master (A-compatible 1C frame, model 1) Protocol is used to send user-
specified or specific (e.g., Device Memory Read/Write) Computer Link commands using the A-compat-
ible 1C frame model 1 control protocol from a CS/CJ-series PLC (CPU Unit) connected through RS-
232C or RS-422A to a Mitsubishi PLC (Sequencer CPU Module installed in a Computer Link Module).
This protocol enables the OMRON PLC to be used as the host (master) to remotely execute
RUN/STOP for or read/write the device memory of a Mitsubishi A/QnA/Q-series PLC that is connected
either serially or on a MELSECNET/Ethernet network.
R-3-1 Communications Specifications
Item Specifications
Protocol Computer Link, A-compatible 1C frame, model 1
Transmission path connec-
tion Multi-point
Host (OMRON CS/CJ-series PLC): Mitsubishi Sequencer CPU Module
1:1, 1:n (n = 32 max), m:n (m+n = 32 max)
Note 1: Specifying the PLC number enables access of the specified Sequencer CPU Mod-
ule on the MELSECNET or Ethernet network.
Note 2: Sending data using slave-initiated communications (on-demand function) from the
Sequence CPU Unit to the Host is not supported.
Communications method RS-232C, RS-422A (4-wire, half-duplex)
Synchronization method Start-stop synchronization
Transmission code ASCII
Data length 7, 8 bits
Note: 8-bit units with "0" added to the beginning of the 7-bit code
Stop bits 1, 2 bits
Error detection method Horizontal parity (none, 1 bit)
Serial Communications Unit/Board
CPU Unit
PMCR(260)
Executing standard system Computer Link Master Protocol
Computer Link Unit
RS-232C or RS-422A (Computer Link)
Mitsubishi PLC
OMRON CS/CJ-series PLC
Computer Link
command