MbusMasterFunctionsreadInputDiscretes Method (Int32, Int32, Boolean, Int32)

Modbus function 2 (02 hex), Read Inputs Status/Read Input Discretes.

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

Syntax

C++

Copy

public int readInputDiscretes(
	int slaveAddr,
	int startRef,
	bool[] bitArr,
	int numDiscretes
)

Public Function readInputDiscretes ( 
	slaveAddr As Integer,
	startRef As Integer,
	<OutAttribute> bitArr As Boolean(),
	numDiscretes As Integer
) As Integer

public:
int readInputDiscretes(
	int slaveAddr, 
	int startRef, 
	[InAttribute] [OutAttribute] array<bool>^ bitArr, 
	int numDiscretes
)

Parameters

slaveAddr: Type: SystemInt32
Modbus address of slave device or unit identifier (Range: 1 - 255)
startRef: Type: SystemInt32
Start reference (Range: 1 - 65536)
bitArr: Type: SystemBoolean
Buffer which will contain the data read.
numDiscretes: Type: SystemInt32
Number of inputs to be read (Range: 1-2000).

Return Value

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

Remarks

Reads the contents of the discrete inputs (input status, 1:00000 table).

Note
No broadcast supported

Reference

MbusMasterFunctions Class

readInputDiscretes Overload

FieldTalk.Modbus.Master Namespace

MbusMasterFunctionsAddLanguageSpecificTextSet("LST88C97C8B_0?cpp=::|nu=.");readInputDiscretes Method (Int32, Int32, AddLanguageSpecificTextSet("LST88C97C8B_1?cpp=array&lt;");BooleanAddLanguageSpecificTextSet("LST88C97C8B_2?cpp=&gt;|vb=()|nu=[]");, Int32)

Parameters

Return Value

Reference

MbusMasterFunctionsreadInputDiscretes Method (Int32, Int32, Boolean, Int32)