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ModbusTCP_ReadDiscreteInputs


Header: STD.h
Namespace: fil
Module: FoundationLite

Function Code 02. Reads contiguous status of discrete inputs in a remote device

Syntax

void fil::ModbusTCP_ReadDiscreteInputs
(
	const fil::SocketId& inSocket,
	const ftl::Optional<int>& inTimeout,
	int inUnitID,
	int inStartingAddress,
	int inBitCount,
	ftl::Array<bool>& outBits
)

Parameters

Name Type Range Default Description
Input value
 inSocket const SocketId& Connected socket ID on port 502.
Input value
 inTimeout const Optional<int>& 10 - NIL Timeout in milliseconds, block if not specified.
Input value
 inUnitID int 0 - 255 1 Default is 1.
Input value
 inStartingAddress int 0 - 65535 The address of the first input.
Input value
 inBitCount int 1 - 2000 1 Requested number of bits.
Output value
 outBits Array<bool>& Response.