Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario descargar pdf (Pagina 97)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-37

Return Value:

Considerations:

Supported in the DOS API library and the Windows NT API library

Example:

HANDLE Handle;

BYTE jmpr;

int retcode;

retcode = OC_GetUserJumperState( Handle, &jmpr );

OC_GetUserLEDState

OC_GetUserLEDState reads the status of one of the four user-defined

LEDs.

Syntax:

int OC_GetUserLEDState(HANDLE handle, int lednum,

int *state);

Parameters:

Description:

The application can use this function to determine the current state of

the LEDs.

Name: Value: Description:

SUCCESS 0 switch position was read successfully

ERR_OCACCESS 2

handle does not have access to scanner

ERR_OCINIT 5 scanner has not been initialized, see OC_InitScanner

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

lednum Must be a value from 1 to 4, which corresponds to LED 1, LED 2,

LED 3, and LED 4

state If

state is:

LED_OFF LED is off

LED_RED_SOLID LED is on, red solid

LED_GREEN_SOLID LED is on, green solid

LED_RED_FLASH LED is on, red flashing (LED1

and LED2 only)

LED_GREEN_FLASH LED is on, green flashing (LED1

and LED2 only)

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Rockwell-automation 1747-PCIS API Software - Open Controller Manual de usuario Pagina 97