The RS-232 Communication channel on the SLC 5/03, SLC 5/04, and SLC 5/05 processors supports four protocols:
• Full-Duplex DF1 (default)
• Half-Duplex DF1 (SCADA)
• DH-485
• ASCII Communications
The SLC and PLC products detailed in this appendix that communicate over the RS-232 Communication interface also use the DF1 serial communication protocol. DF1 protocol delimits messages, controls message flow, detects and signals errors, and retries after errors are detected.
The SLC 5/03, SLC 5/04, and SLC 5/05 processors can communicate by means of the RS-232 Communication port,
channel 0. Channel 0 supports DF1 full-duplex protocol and DF1 half-duplex master and slave protocol, DH485 protocol , as well as ASCII communications. Refer to your programming software user manual for information on configuring the RS-232 Communication port, channel 0.
Channel 0 provides a minimum of 500V dc isolation between the I/O signals and the logic ground of the SLC 5/03, SLC 5/04, and SLC 5/05 processors. The channel is a 9-pin D-shell. The table below provides a description of each of the pins.
Tag : RS-232 Communication, RS-232 , RS-232 Communication for SLC 500, RS-232 interface, RS-232 Connector
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