The RMC SERIAL module adds a single serial port to the RMC for communications with other devices such as HMIs and PLCs. This port cannot be used for communications with RMCWin or the RMCLink ActiveX Control and .NET Assembly Component. However, that one serial port has a great amount of flexibility, as summarized below:
Protocols: Modbus/RTU, Allen-Bradley DF1 (Full- and Half-duplex), Mitsubishi Binary
Baud Rate: 9,600 to 115,200.
Parity: Odd, Even, or None
Line Drivers: RS-232, RS-422, and RS-485
Flow Control (RS-232 only): None or Hardware (RTS/CTS)
Termination and Biasing (RS-422/485 only): Both software selectable on Rx and Tx wire pairs
Note: Hardware revision 1 of the RMC SERIAL module is more limited in its termination and biasing options. See RS-422/485 Termination and Biasing for details.
In addition, the RMC SERIAL has been designed to facilitate adding additional protocols and higher baud rates as driven by customer demand. Therefore, if your serial protocol or baud rate is not currently supported, contact Delta to request a new protocol or feature.
The RMC SERIAL module is passive in that it always waits for a request from a master serial device before responding. It does not initiate communications.
Because of the large number of options offered by the RMC SERIAL, setting up the RMC SERIAL can be intimidating to users new to serial communications. Therefore, we recommend reading each of the following topics carefully before designing your serial network:
Finally, the following topics describe how to use each protocol supported by the RMC SERIAL:
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