Modicon Modbus Addressing

Topic: CM264

Note: We continue to add device-specific drivers to simplify configuring communication with popular modbus devices. Refer to the Help File "What's New" topic for recently added device-specific modbus drivers.

Memory Type	Address Range	Bit Specification	Description	Read/Write Type	Data Type
0	1 to 65536	—	Coil	R/W	Discrete
1	1 to 65536	—	Input	Read Only	Discrete
3	1 to 65536	0 to 15	—	Read Only	Discrete
3	1 to 65536	—	Input Register	Read Only	Word
4	1 to 65536	0 to 15	—	R/W	Discrete
4	1 to 65536	—	Holding Register	R/W	Word

Function Code	Action
01 (01 hex)	Read Coils
02 (02 hex)	Read Input Bits
03 (03 hex)	Read Holding Registers
04 (04 hex)	Read Input Registers
05 (05 hex)	Write Single Coil
06 (06 hex)	Write Single Register
15 (0F hex)	Write Multiple Coils
16 (10 hex)	Write Multiple Registers