FieldTalk Modbus Master Library for .NET

MbusMasterFunctionsreadWriteRegisters Method (Int32, Int32, Int16, Int32, Int16)

Modbus function 23 (17 hex), Read/Write Registers.

Namespace: FieldTalk.Modbus.Master
Assembly: FieldTalk.Modbus.Master (in FieldTalk.Modbus.Master.dll) Version: 2.15.2-eval+3d8362b4bb861c05760d48b11d303e954bb8597c

Syntax

C++

Copy

public int readWriteRegisters(
	int slaveAddr,
	int readRef,
	short[] readArr,
	int writeRef,
	short[] writeArr
)

Public Function readWriteRegisters ( 
	slaveAddr As Integer,
	readRef As Integer,
	<OutAttribute> readArr As Short(),
	writeRef As Integer,
	writeArr As Short()
) As Integer

public:
int readWriteRegisters(
	int slaveAddr, 
	int readRef, 
	[InAttribute] [OutAttribute] array<short>^ readArr, 
	int writeRef, 
	array<short>^ writeArr
)

Parameters

slaveAddr: Type: SystemInt32
Modbus address of slave device or unit identifier (Range: 1 - 255)
readRef: Type: SystemInt32
Start registers for reading (Range: 1 - 65536)
readArr: Type: SystemInt16
Buffer which will contain the data read. The length of the array determines how many registers are read (Range: 1-125).
writeRef: Type: SystemInt32
Start registers for writing (Range: 1 - 65536)
writeArr: Type: SystemInt16
Buffer with data to be sent. The length of the array determines how many registers are written (Range: 1-121).

Return Value

Type: Int32
BusProtocolErrors.FTALK_SUCCESS on success or error code. See BusProtocolErrors for possible error codes.

Remarks

Combines reading and writing of the output registers in one transaction (holding registers, 4:00000 table).

Note
No broadcast supported

Reference

MbusMasterFunctions Class

readWriteRegisters Overload

FieldTalk.Modbus.Master Namespace

FieldTalk Modbus Master Library for .NET
Library version 2.15.2