Mewtocol Master / Slave Communication - Panasonic FP0H User Manual

1.2.2 MEWTOCOL Master / Slave Communication

 Overview of function
• Communication is performed using a communication protocol "MEWTOCOL-COM" used by
Panasonic PLC.
• Master communication is performed by PLC sending commands to, and receiving responses
from, devices that support MEWTOCOL. Data can be read and written by specifying unit
numbers and memory addresses and executing F145 (SEND) / F146 (RECV) instructions in
a user program, because PLC automatically creates messages according to the protocol.
• A computer or display connected to PLC has the transmission right in slave communication.
Slave communication is performed when the device sends a command, and PLC returns a
response. In slave communication, no communication program is required on the PLC side,
because PLC automatically returns a response.
• The data size that can be sent or received at a time is a maximum of 507 words for register
transmission, 509 words for register reception, and 1 bit for bit transmission or reception.
Master function
Slave function
 Purpose of MEWTOCOL master communication (example)
This is used for connection with devices that support MEWTOCOL (Panasonic PLC protocol).
• Programmable controller FP series
• Displacement sensor HL series
• Eco-power meter KW series
 Purpose of MEWTOCOL slave communication (example)
This is used for connection with devices that support MEWTOCOL-COM master
communication (Panasonic PLC protocol).
• Programmable displays from other manufacturers
1.2 Overview of Communication Functions
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