Modbus Syntax and Register Configuration for atvise® Connect

Created by Vester Business Support Team, Modified on Mon, 30 Dec, 2024 at 6:29 PM by Agent Aaron Camacho

For atvise® Connect the following item syntax is set up as show below:

Syntax with Letter

This section describes the syntax for addressing using letters to represent different area types in the Modbus protocol when working with atvise® Connect. Each area type has specific access rights and orientation, determining whether the registers can be read, written, or both.

Syntax with Letter
Area Type	Syntax	Example	Orientation	Access Rights
Discrete Output	O	O15	BIT	Read/Write
Discrete Input	I	I5	BIT	Read
Input Register	IR	IR10	WORD	Read
Holding Register	HR	HR1	WORD	Read/Write
Input Register	IRW	IRW3	UINT16	Read
Holding Register	HRW	HRW2	UINT16	Read/Write

Syntax with Number

This section presents the address syntax using numbers to represent different area types in the Modbus protocol. The addresses are categorized by the type of register and data format, along with their access permissions.

Syntax with Number
Area Type	Syntax	Example	Orientation	Access Rights
Discrete Output	0XXXX	00015	BIT	Read/Write
Discrete Input	1XXXX	10005	BIT	Read
Input Register	3XXXX	30010	WORD	Read
Holding Register	4XXXX	40001	WORD	Read/Write
Input Register	3WX	3W5	UINT16	Read
Holding Register	4WX	4W5	UINT16	Read/Write

Other Syntax & Registers Combining

This section introduces additional syntax options for working with registers in Modbus, including the use of individual bits and the combination of registers to form longer data types such as 32-bit integers, 64-bit integers, or floating-point numbers.

Other Sintaxis & Join Registers
Data Type	Syntax	Example	Register	Raw Value
BIT	HRXn.bit	HRX5.3	40005 = 255	[0000000011111111]
INT32	HRD / IRD	HRD1	40000 + 40001	-
UINT32	HRDW / IRDW	HRDW1	40000 + 40001	-
FLOAT	HRF / IRF	HRF5	40004 + 40005	-