Rockwell-automation 1747-PCIS API Software - Open Controller Manual do Utilizador descarregar pdf (Página 103)

Publication 1747-UM002A-US-P - June 2000

Library of Routines 6-43

Considerations:

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

Example:

HANDLE Handle;

int retcode;

retcode = OC_OpenScanner(&Handle, 0, 0 );

if OC_OpenScanner(&Handle, 0xC800, IRQ11) ! = SUCCESS)

{printf(‘Scanner could not be opened!\n’);}

OC_PetHostWatchdog

OC_PetHostWatchdog increments the host-to-scanner watchdog

Syntax:

void OC_PetHostWatchdog(HANDLE handle);

Parameters:

Description:

OC_PetHostWatchdog must be called at time intervals less than the

timeout value specified in the OC_SetHostWatchdog function.

Return Value:

Considerations:

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

Example:

HANDLE Handle;

retcode = OC_PetHostWatchdog( Handle );

Parameter: Description:

handle Must be a valid handle returned from OC_OpenScanner

Name: Value: Description:

SUCCESS 0 watchdog was updated successfully

ERR_OCACCESS 2

handle does not have access to scanner

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Rockwell-automation 1747-PCIS API Software - Open Controller Manual do Utilizador Página 103