Rockwell-automation 1747-PCINT API Software for 1746 I/O Instrukcja Użytkownika Pobierz pdf (Strona 81)

OC_GetIOConfiguration Library of Routines 6–27

Publication 1747-6.5.3 June 1998

OC_GetIOConfiguration OC_GetIOConfiguration queries the I/O rack about the installed rack sizes and

I/O modules in each 1746 chassis.

Syntax:

int OC_GetIOConfiguration(HANDLE handle, OCIOCFG *iocfg);

Parameters:

Description:

If the scanner is in Scan mode and OC_GetIOConfiguration returns successfully, OC_GetIOConfiguration

enables the host application to access I/O. The scanner must have previously received a valid configuration

prior to going to Scan mode.

The

OCIOCFG

structure is defined as:

typedef struct tagOCIOCFG

{

BYTE Rack1Size; /* number of slots in Rack 1 */

BYTE Rack2Size; /* number of slots in Rack 2 */

BYTE Rack3Size; /* number of slots in Rack 3 */

OCSLOTCFG SlotCfg[OCMAXSLOT];/* configuration for each slot */

} OCIOCFG;

ATTENTION: OC_GetIOConfiguration can take several

milliseconds to complete, depending upon the rack

configuration. While it is executing, I/O scanning and DII’s

are disabled.

Parameter: Description:

handle

Must be a valid handle returned from OC_OpenScanner

iocfg

Specifies the rack sizes and installed modules

Use the information in

iocfg as input to OC_DownloadIOConfiguration

to configure the scanner.

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Rockwell-automation 1747-PCINT API Software for 1746 I/O Instrukcja Użytkownika Strona 81