How do you send an ASCII string out from a Schneider (Modicon) M340 or M580 with ModbusTCP/IP?
Product Line:
M340, M580, X80
Environment:
Ecostruxure Control Expert
Resolution:
Unfortunately, you cannot;
The M340 and M580 ethernet ports can only send or receive Modbus TCP/IP or Ethernet/IP messaging. They cannot read or write in ASCII characters using these protocols.
The only option is to use the M340 Modbus serial port or BMX NOM 0200 module with the INPUT_CHAR or the PRINT_CHAR function blocks to read and write an ASCII string to or from a server device.
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Released for: Schneider Electric USA
