Rockwell-automation 1747-PCINT API Software for 1746 I/O Uživatelský manuál stáhnout pdf (Strana 122)

6–68 Library of Routines OC_SetIOIdleState

Publication 1747-6.5.3 June 1998

OC_SetIOIdleState OC_SetIOIdleState controls the state of I/O when the scanner goes from Scan mode

to Idle mode.

Syntax:

int OC_SetIOIdleState(HANDLE handle, int mode);

Parameters:

Description:

The I/O will always be reset in the case of a fault.

Return Value:

Considerations:

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

Example:

HANDLE Handle;

int retcode;

retcode = OC_SetIOIdleState( Handle, IDLESTATE_HOLD );

/* Outputs will remain in last state when scanner goes to idle mode */

Parameter: Description:

handle

Must be a valid handle returned from OC_OpenScanner

mode

If mode is:

IDLESTATE_HOLD module I/O’s maintain their last state.

IDLESTATE_RESET module I/O’s are reset by the scanner.

The default I/O idle state is IDLESTATE_RESET.

Name: Value: Description:

SUCCESS

I/O state was changed successfully

ERR_OCACCESS

handle does not have access to scanner

ERR_OCINIT

scanner has not been initialized; see OC_InitScanner

ERR_OCPARAM

parameter contains invalid value

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Rockwell-automation 1747-PCINT API Software for 1746 I/O Uživatelský manuál Strana 122