2.6 Communications with a Mitsubishi PLC (A-compatible 1E Frame protocol)
Using Automatic Reception with the MP3000 as a Slave
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2.6
Communications with a Mitsubishi PLC (A-compatible 1E Frame protocol)
When using Ethernet communications between the MP3000 and a Mitsubishi Q/A-series PLC, use the A-
compatible 1E Frame protocol as the communications protocol. The A-compatible 1E Frame protocol
allows the master to read and write the contents of slave registers.
This section describes communications when the MP3000 acts as a slave and as the master.
Using Automatic Reception with the MP3000 as a Slave
This section describes how to communicate with a Mitsubishi Q/A-series PLC by using automatic recep-
tion.
Note: When using the A-compatible 1E Frame protocol to communicate with a Mitsubishi PLC, the PLC can read from
and write to hold registers in the MP3000 by using fixed buffer communications. Due to the specifications of the
A-compatible 1E Frame protocol, inter-CPU Module communications and random-access communications cannot
be used if the MP3000 is acting as a slave.
EthernetEthernet
MP3000
218IFD
MP3000
(local station)
Mitsubishi
MELSEC
Q/A-series PLC
(remote station)
Master
Communications Protocol
Connection Type
TCP or UDP
Data Code
Binary or ASCII
Automatic reception
(no ladder programming)
MELSEC Q Series
BUFSND instruction
(ladder application)
A-compatible 1E Frame protocol
(fixed buffer communications with protocol)
A-compatible 1E Frame
Slave