Configure MacSync using Server

Data Types

Code	Data Type	Description
00	INT16	16-bit signed integer
01	UINT16	16-bit unsigned integer
02	INT32 [MSB]	Most significant 32-bit signed integer
03	INT32 [LSB]	Least significant 32-bit signed integer
04	FLOAT32 [MSB]	Most significant 32-bit floating-point number
05	FLOAT32 [LSB]	Least significant 32-bit floating-point number

Payload Structure

Parameter	Type	Description	Default	Valid Range
Field	Integer	Data field identifier	1	1–255
slaveld	Integer	ID of the slave device	1	1–247
functionCode	Integer	Function code for the operation (e.g., read, write)	3	1–6, 15, 16
Enable	Integer	Enable flag (1 for enabled, 0 for disabled)	1	0 or 1
datatype	Integer	Specifies the data type of the value to read	01	00–05
groupParaNo	Integer	Number of registers in a single group	1	1–125
Registeraddress	Integer	Address of the registers	0	0–65535

One-Time Modbus Register Read

Example payload (JSON):

{ 
"slaveId": 1, 
"functionCode": 3, 
"dataType": 1, 
"numberOfParameters": 1, 
"Registeraddress": 257
}

note

Use FPort = 13

Modbus Register Update

Example payload (JSON):

{ 
"Field": 1,
"slaveld": 2,
"functionCode": 3,
"Enable": 1,
"datatype": 2,
"numberOfParameters": 1,
"Registeraddress": 3036
}

note

Use FPort = 10

Updating Device Heartbeat

Example payload (JSON):

{ 
"txTime": 60
}

note

Use FPort = 06 & Times in seconds

Modifying Slave Id & Registers/Coils

Example payload (JSON):

{ 
"slaveid": 4,
"value": 255 ,
"numberofreg": 1, 
"address": 0
}

note

Use FPort = 08 for registers & FPort = 09 for coils

Verifying Modbus Registers

Example payload (JSON):

{ 
"index": 1 
}

note

Use FPort = 15

Configuring Baud Rate & Parity

Example payload (JSON):

{ 
"baud": 9600, 
"parity": 1 
}

note

Use FPort = 12 for RS485 read operations.

Parity	Description
None	0
Odd	1
Even	2