FieldTalk Modbus Master Library for .NET

MbusMasterFunctionsreadInputRegisters Method (Int32, Int32, Array, Int32)

Modbus function 4 (04 hex), Read Input Registers (16-bit, 32-bit, 64-bit and floating point single and double).

Namespace: FieldTalk.Modbus.Master
Assembly: FieldTalk.Modbus.Master (in FieldTalk.Modbus.Master.dll) Version: 2.14.0-eval+fc7d3f12456d1103fd8171fc3bffe59150a224d7

Syntax

C++

Copy

public int readInputRegisters(
	int slaveAddr,
	int startRef,
	Array regArr,
	int numRegs
)

Public Function readInputRegisters ( 
	slaveAddr As Integer,
	startRef As Integer,
	<OutAttribute> regArr As Array,
	numRegs As Integer
) As Integer

public:
int readInputRegisters(
	int slaveAddr, 
	int startRef, 
	[InAttribute] [OutAttribute] Array^ regArr, 
	int numRegs
)

Parameters

slaveAddr: Type: SystemInt32
Modbus address of slave device or unit identifier (Range: 1 - 255)
startRef: Type: SystemInt32
Start register (Range: 1 - 65536)
regArr: Type: SystemArray
Array which will be filled with the data read. Accepted array types are Int16[], UInt16[], Int32[], UInt32[] and float[].
numRegs: Type: SystemInt32
Number of values to be read (Range: 1-125 for 16-bit, 1-62 for 32-bit and floats, 1-31 for 64-bit and doubles).

Return Value

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

Remarks

Read the contents of the input registers (3:00000 table).

Note
No broadcast supported

Reference

MbusMasterFunctions Class

readInputRegisters Overload

FieldTalk.Modbus.Master Namespace

FieldTalk Modbus Master Library for .NET
Library version 2.14.0

MbusMasterFunctionsAddLanguageSpecificTextSet("LST4E89C492_0?cpp=::|nu=.");readInputRegisters Method (Int32, Int32, Array, Int32)

Parameters

Return Value

Reference

MbusMasterFunctionsreadInputRegisters Method (Int32, Int32, Array, Int32)