MbusMasterFunctions.readInputLongInts Method (Int32, Int32, Int32[])

Modbus function 4 (04 hex) for 32-bit long int data types, Read Input Registers as long int data

[Visual Basic]
Overloads Public Function readInputLongInts( _
   ByVal slaveAddr As Integer, _
   ByVal startRef As Integer, _
   ByVal int32Arr As Integer() _
) As Integer

[C#]
public int readInputLongInts(
   int slaveAddr,
   int startRef,
   int[] int32Arr
);

Parameters

slaveAddr: Modbus address of slave device or unit identifier (Range: 1 - 255)
startRef: Start reference (Range: 1 - $10000)
int32Arr: Buffer which will be filled with the data read. The length of the array determines how many values are read (Range: 1-62).

Return Value

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

Remarks

Reads the contents of pairs of consecutive input registers (3:00000 table) into 32-bit long int values.

Note Modbus does not know about any other data type than discretes and 16-bit registers. Because a long int value is of 32-bit length, it will be transferred as two consecutive 16-bit registers. This means that the amount of registers transferred with this function is twice the amount of int values passed to this function.

Note No broadcast supported

MbusMasterFunctions.readInputLongInts Method (Int32, Int32, Int32[])

Parameters

Return Value

Remarks

See Also