CHAPTER 18: MODBUS PROTOCOL

MODBUS PROTOCOL

18.2.2 Format Codes

Bitmap: 32-bit group of bits, packed into two registers. Encoded in big endian.

F1: 16-bit unsigned integer

F2: Enumeration - power alarm

0 = power supply good

1 = power supply fail

F3: Enumeration - OFF/ON

0 = Off

1 = On

F4: Enumeration: port type

0 = Giga - GBIC

1 = Copper - TP

2 = Fiber - 10

3 = Fiber - 100

4 = Giga - 10/100/1000 (triple speed)

5 = Giga - Copper 1000 TP

6 = Giga - SFP

F9: 32-bit unsigned long

String: A sequence of octets, packed 2 to one register in sequence.

MULTILINK ML1200 MANAGED FIELD SWITCH – INSTRUCTION MANUAL

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GE ML1200 instruction manual Format Codes