Modbus Rtu Communication (For L40Mr And L60Mr Types) - Panasonic FP-X0 L14R User Manual

6.7 MODBUS RTU Communication (For L40MR and L60MR
types)
6.7.1 Overview of Functions
The MODBUS RTU protocol enables the communication between the FP-X0 and other devices
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(including our FP-X, FP-e, Programmable display GT series and KT temperature control).
Enables to have conversations if the master unit sends instructions (command messages) to slave
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units and the slave units respond (response messages) according to the instructions.
Enables the communication between the devices of max. 255 units as the master function and slave
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function is equipped.
About MODBUS RTU
The MODBUS RTU communication is a function for the master unit to read and write the data in slave
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units communicating between them.
There are ASCII mode and RTU (binary) mode in the MODBUS protocol, however, the FP-X0 is
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supported with the RTU (binary) mode only.
Master function
Writing and reading data for various slaves is available using the F145 (SEND) and F146 (RECV)
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instructions.
Individual access to each slave and the global transmission is possible.
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Slave function
If the slave units receive a command message from the master unit, they send back the response
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message corresponding to the content.
Do not execute the F145 (SEND) or F146 (RECV) instructions when the unit is used as a slave unit.
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