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FieldTalk Modbus Master Library for .NET
FieldTalk Modbus Master Library for .NET
Namespaces
FieldTalk.Modbus.Master
MbusMasterFunctions Class
MbusMasterFunctions Methods
readInputRegisters Method
readInputRegisters Method (Int32, Int32, Array)
readInputRegisters Method (Int32, Int32, Array, Int32)
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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: 2.15.2-eval+3d8362b4bb861c05760d48b11d303e954bb8597c
Syntax
C#
VB
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 Note
No broadcast supported
See Also

Reference

MbusMasterFunctions Class
readInputRegisters Overload
FieldTalk.Modbus.Master Namespace
FieldTalk Modbus Master Library for .NET
Library version 2.15.2
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