Mewtocol Master/Slave Communication - Panasonic AFP7CPS4E User Manual

1.2.2 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.
Master function
Slave function
 Examples of applications of MEWTOCOL master communication
This is used for connection with a device that supports our PLC's protocol MEWTOCOL.
 Programmable controller FP series
 Displacement sensor HL series
 Eco power meter KW series
 Examples of applications of MEWTOCOL slave communication
This is used for connection with a device that supports our PLC's protocol MEWTOCOL-COM
master communication.
 Programmable displays made by various manufacturers
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1.2 Overview of Communication Functions
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