Rockwell-automation 1747-PCINT API Software for 1746 I/O Uživatelský manuál stáhnout pdf (Strana 128)

6–74 Library of Routines OC_SetUserLEDState

Publication 1747-6.5.3 June 1998

OC_SetUserLEDState OC_SetUserLEDState sets the state of a user-defined LED

Syntax:

int OC_SetUserLEDState(HANDLE handle, int lednum, int state);

Parameters:

Description:

The application can use the four user LEDs for any purpose.

Return Value:

Considerations:

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

Example:

HANDLE Handle;

int retcode;

retcode = OC_SetUserLEDState( Handle, 1, LED_GREEN_SOLID );

Parameter: Description:

handle

Must be a valid handle returned from OC_OpenScanner

lednum

Must be a value from 1 to 4, which corresponds to LED1, LED2, LED3, and

LED4

ledstate

If ledstate 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)

Name: Value: Description:

SUCCESS

LED was updated successfully

ERR_OCACCESS

handle does not have access to scanner

ERR_OCPARAM

parameter contains invalid value

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Rockwell-automation 1747-PCINT API Software for 1746 I/O Uživatelský manuál Strana 128