Rockwell Automation 1747-PCINT API Software for 1746 I/O - Manual (Page 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 0 I/O state was changed successfully
ERR_OCACCESS
2
handle does not have access to scanner
ERR_OCINIT 5 scanner has not been initialized; see OC_InitScanner
ERR_OCPARAM
8
parameter contains invalid value