Moxa M-1401 Handbuch PDF herunterladen (Seite 28)

ioLogik MXIO DLL API Reference System Commands Sets

4-3

MXSIO_Connect

Based on the COM port handle or ioLogik E2000 handle, users

must use this function to establish an I/O device handle for each

RS-485 or RS-232 I/O. A COM port handle can connect one

RS-232 I/O or up to 32 RS-485 I/O.

C/C++

Arguments

Return Value

int MXSIO_Connect ( int hCommport,

BYTE bytUnitID,

BYTE bytTransmissionMode,

int *hConnection);

hCommport: I/O over serial interface will get a serial

handle. I/O server over Ethernet interface

will get an Ethernet handle.

For more details, please see the Program

Flow IV and Program Flow V in Chapter 2.

bytUnitID: Modbus unit ID of the I/O, from 01

to 99.

bytTransmissionMod Modbus transmission format.

ex:

0: RTU mode

1: ASCII mode.

Note that the protocol settings must agree

with the hardware settings on the ioLogik

4000 I/O, and the ioLogik R2000 only

supports RTU.

hConnection: Handle of the I/O device connection.

Succeed MXIO_OK.

Fail Refer to Return Codes.

MXSIO_Disconnect

This will disconnect the RS-485/232 I/O. The I/O handle will be

invalid.

C/C++

Arguments

Return Value

int MXSIO_Disconnect ( int hConnection);

hConnection: Handle of the I/O device connection.

Succeed MXIO_OK.

Fail Refer to Return Codes.

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Moxa M-1401 Handbuch Seite 28