ObjectType: Available Object Types to be Read/Written

Enumerated Type Description

The ObjectType enumerated data type contains the object types that are available for reading and/or writing.

The table below lists the data type values, the corresponding object types and the Modbus request function codes associated with each function block:

			Read / Write Functions and associated Modbus Request Function Code
Enumerator	Value (hex)	Object Type)	READ_VAR	WRITE_VAR	SINGLE_WRITE	WRITE_READ_VAR
`MW`	`00`	Holding Register (16 bits)	#3 (Read Holding Registers)	#16 (Write Multiple Registers)	#6 (Write Single Register)	#23 (Write-Read Multiple Registers)
`I`	`01`	Digital Input (1 bit)	#2 (Read Digital Inputs)	—	—	—
`Q`	`02`	Internal bit or Digital output (coil) (1 bit)	#1 (Read Coils)	#15 (Write Multiple Coils)	—	—
`IW`	`03`	Input register (16 bits)	#4 (Read Input Registers)	—	—	—