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B - REMOTE COMMUNICATION
11.2.1 Conguring of the Serial Link
The I/O group contains the parameters that govern the baud rate, watchdog timer, and protocol selection for
the serial interface. (I/O 46 to I/O 50)
All addresses from 1 to 247 are allowed for RSi S4 drives. Address 0 is a broadcast address understood by
all drives; however, no reply is returned for messages sent to this address.
11.2.2 Parameter Addresses
Each parameter is assigned a unique memory address to permit easy reading and conguration. Chapter 6
and 7 lists all RSi S4 parameters and the memory address assigned to each under the Modbus heading.
11.2.3 RSi S4 VFDs
RSi S4 VFDs can be controlled remotely via Modbus in the standard product, and via other eldbusses with
optional communications cards. The bits in Control Word 1 and Control Word 2 are used to control various
aspects of the drive’s operation, and the bits in Status Word 1 and Status Word 2 are used to communicate
drive status back to the controlling computer.
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