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Can the Serial Communication protocol of an M340 PLC be changed dynamically?

Yes the Serial Communication can be changed dynamically from Modbus Master, Modbus Slave, or Character mode by using a WRITE_CMD (%MWr.m.c.24.bit) and toggling bits 12, 13, or 14 respectively.
Example:
1) Bit 12 = 1, bits 13 & 14 = 0 Current protocol is changed to Modbus Master
2) Bit 13 = 1, bits 12 & 14 = 0 Current protocol is changed to Modbus Slave
3) Bit 14 = 1, bits 12 & 13 = 0 Current protocol is changed to Character Mode

Schneider Electric Vietnam

You are currently viewing the content available in Vietnam. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
Can the Serial Communication protocol of an M340 PLC be changed dynamically?

Yes the Serial Communication can be changed dynamically from Modbus Master, Modbus Slave, or Character mode by using a WRITE_CMD (%MWr.m.c.24.bit) and toggling bits 12, 13, or 14 respectively.
Example:
1) Bit 12 = 1, bits 13 & 14 = 0 Current protocol is changed to Modbus Master
2) Bit 13 = 1, bits 12 & 14 = 0 Current protocol is changed to Modbus Slave
3) Bit 14 = 1, bits 12 & 13 = 0 Current protocol is changed to Character Mode

Schneider Electric Vietnam

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