LitDev Extension API

GW	LD3DView	LDArray	LDBits	LDBlueTooth
LDCall	LDChart	LDClient	LDClipboard	LDColours
LDCommPort	LDController	LDControls	LDCursors	LDDataBase
LDDateTime	LDDebug	LDDialogs	LDDictionary	LDEffect
LDEmail	LDEncryption	LDEvents	LDFastArray	LDFastShapes
LDFigures	LDFile	LDFinances	LDFocus	LDftp
LDGeography	LDGraph	LDGraphicsWindow	LDHashTable	LDHID
LDIcon	LDImage	LDInline	LDIOWarrior	LDList
LDLogic	LDMath	LDMathX	LDMatrix	LDModbus
LDMusic	LDNetwork	LDPhysics	LDProcess	LDQueue
LDRegex	LDResources	LDScrollBars	LDSearch	LDServer
LDSettings	LDShapes	LDShell	LDSort	LDSound
LDSpeech	LDStatistics	LDStopwatch	LDText	LDTextWindow
LDTimer	LDTranslate	LDUnits	LDUtilities	LDVector
LDWaveForm	LDWebCam	LDWindows	LDxml	LDZip
TW

LDModbus
Modbus I/O utility.

Close	ConnectSerial	ConnectTcp
ConnectUdp	ReadCoils	ReadHoldingRegisters
ReadInputRegisters	ReadInputs	WriteCoil
WriteRegister

Close()
Close existing Modbus master connection
returns "SUCCESS" or "FAILED"

ConnectSerial(portname,baudrate)
Connect to Modbus master using Serial port (RTU)
portname IP address string, e.g. "COM1"
baudrate Baud rate, e.g. 9600
returns "SUCCESS" or "FAILED"

ConnectTcp(address,port)
Connect to Modbus master using TCP/IP
address IP address string, e.g. "127.0.0.1"
port Port number, e.g. 502
returns "SUCCESS" or "FAILED"

ConnectUdp(address,port)
Connect to Modbus master using UDP
address IP address string, e.g. "127.0.0.1"
port Port number, e.g. 502
returns "SUCCESS" or "FAILED"

ReadCoils(slave,start,number)
Read Coil data, discrete output data ("True" or "False")
slave The client number, 0 to 247
start The first coil to read (1 to 9999)
number The number of coils to read
returns An array of results (if number is 1 then a single value is returned) or "FAILED"

ReadHoldingRegisters(slave,start,number)
Read Holding register data, discrete output data (16 bit unsigned integer)
slave The client number, 0 to 247
start The first holding register to read (1 to 9999)
number The number of holding registers to read
returns An array of results (if number = 1 then a single value is returned) or "FAILED"

ReadInputRegisters(slave,start,number)
Read Input register data, discrete input data (16 bit unsigned integer)
slave The client number, 0 to 247
start The first input register to read (1 to 9999)
number The number of input registers to read
returns An array of results (if number = 1 then a single value is returned) or "FAILED"

ReadInputs(slave,start,number)
Read Input data, discrete input data ("True" or "False")
slave The client number, 0 to 247
start The first input to read (1 to 9999)
number The number of inputs to read
returns An array of results (if number is 1 then a single value is returned) or "FAILED"

WriteCoil(slave,address,value)
Write Coil data, discrete output data ("True" or "False")
slave The client number, 0 to 247
address The (first) coil to write (1 to 9999)
value The coil value ("True" or "False"), may be an array of values
returns "SUCCESS" or "FAILED"

WriteRegister(slave,address,value)
Write Holding register data, discrete output data (16 bit unsigned integer)
slave The client number, 0 to 247
address The (first) holding register to write (1 to 9999)
value The holding register value (0 to 65535), may be an array of values
returns "SUCCESS" or "FAILED"