2.6 Communications with a Mitsubishi PLC (A-compatible 1E Frame protocol)
Using I/O Message Communications with the MP3000 as the Master
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Using I/O Message Communications with the MP3000 as the
Master
This section describes how to perform inter-CPU Module communications with a Mitsubishi Q/A-series
PLC by using I/O message communications.
Note: 1. I/O message communications use 1-to-1 communications.
2. When using the A-compatible 1E Frame protocol to communicate with a Mitsubishi Q/A-series PLC, the PLC
can read from and write to the following registers by using inter-CPU Module communications.
• Bit device registers: X, Y read only, M, and B
• Word device registers: D, W, and R
A bit device register is read or written in units of 16-bit words.
3. Use the MSG-SNDE function if you need to read from or write to registers other than those listed above, to use
fixed or random access buffer communications, or to communicate with multiple remote devices.
EthernetEthernet
MP3000
218IFD
MP3000
(local station)
Master
I/O message communications
(no ladder programming)
MELSEC
Q Series
A-compatible 1E Frame protocol
(inter-CPU Module communications)
Slave
Communications Protocol
A-compatible 1E Frame
Connection Type
TCP or UDP
Data Code
Binary or ASCII
Mitsubishi MELSEC
Q/A-Series PLC
(remote station)