Lenze DDS System bus CAN for PLC Manual de usuario descargar pdf (Pagina 161)

System bus (CAN) for Lenze PLC devices

LenzeCanDSxDrv.lib function library

11.4 L_CanDSxOpen − initialising the CanDSx driver

11−5

PLC−Systembus EN 2.0

11.4 L_CanDSxOpen − initialising the CanDSx driver

Function

By means of this function the CanDSx driver is initialised in the operating system of the PLC.

· For the initialisation the transfer parameter bOpen has to be set to TRUE.

· After this function has been carried out, index accesses via the system bus interface are

accordingly diverted to other codes than to the ones which are automatically allocated, using

the mapping table configured by means of the function L_CanDSxIndexInitCode.

Declaration

DWORD L_CanDSxOpen (bOpen);

Transfer parameters Data type Information/possible settings

bOpen Bool Initialising the CanDSx driver in the operating system.

TRUE The CanDSx driver in the operating system is initialised.

Return value Data type Value/meaning

Double word Status

Bit Value

0 0 Driver is initialised.

1 Driver is not initialised.

· Remedy: function call via transfer parameter bOpen = TRUE.

1−15 Reserved for future supplements (bits are set to 0).

· Invalid for bit 0 = 1

16−31 Version of the LenzeCanDSxDrv.lib

function library

· Format: main version/subversion (e. g. 0103hex = version 1.03)

· Invalid for bit 0 = 1

Note!

If the function L_CanDSxOpenis called up while write or read requests for codes are still active, they

are possibly disturbed!

Therefore all actions with a code access should be completed before this function is called.

Example

Calling the function in ST:

IF bOpenCanDSxDriver AND NOT bOpen THEN

bOpen := TRUE;

dwReturnOpen := L_CanDSxOpen(bOpen:=TRUE);

END_IF

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Lenze DDS System bus CAN for PLC Manual de usuario Pagina 161