Contemporary Control Systems EISC Configurable Switches User Manual - Manual (Page 33)

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9.2
Modbus Operation
For Modbus operation, the EIA-232 parameters must be set as follows :
Baud Rate = 9600 bps, Data Bits = 8, Stop Bit = 1, No Parity
9.3
Modbus Registers
9.3.1
WRITE/READ
40001-40016: Port Settings: Auto-negotiation or set speed/duplex per port
Bit 0 – Auto-negotiation (enabled = 1, disabled = 0) – default = 1
Bit 1 – 10Mbps(0) or 100Mbps (1)
Bit 2 – Half duplex (0) or full duplex (1)
Bit 3 – Enable full duplex flow control (enabled = 1, disabled = 0) – default = 1
40001: Port Settings port 1
40002: Port Settings port 2
40003: Port Settings port 3
40004: Port Settings port 4
40005: Port Settings port 5
40006: Port Settings port 6
40007: Port Settings port 7
40008: Port Settings port 8
40009: Port Settings port 9
40010: Port Settings port 10
40011: Port Settings port 11
40012: Port Settings port 12
40013: Port Settings port 13
40014: Port Settings port 14
40015: Port Settings port 15
40016: Port Settings port 16