Panasonic AF7CPS Series, Руководство пользователя

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1.3 Overview of Communication Functions
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1.3 Overview of Communication Functions
1.3.1 MEWTOCOL Master/Slave Communication
 Overview of function

Execute communication using MEWTOCOL-COM, a communication protocol used by our PLC.

In master communication, PLC executes communication by sending commands to devices that
support MEWTOCOL, and receiving responses. Messages in accordance with the protocol are
automatically generated by PLC. In the user program, reading and writing can be done simply by
specifying the station no. and memory address and executing SEND/RECV instructions.

Slave communication is performed when the computer or display connected to PLC has the
sending right, and sends commands, and PLC returns responses. In slave communication, PLC
responds automatically, so no program concerning communication is necessary on the PLC side.

The data size that can be sent or received in a single communication is up to 507 words for
register transmission (up to 1,014 words for MEWTOCOL7-COM) and 1 bit for bit transmission.
FP7 CPU
Device supporting
MEWTOCOL-COM
Ethernet LAN
IP XXXXXX IP XXXXXX
Send/receive data using
MEWTOCOL-COM
Command
Master
communication
Slave
communication
Response
Command
Response