Rockwell-automation 1747-PCINT API Software for 1746 I/O Instrukcja Użytkownika Pobierz pdf (Strona 134)

6–80 Library of Routines OC_WaitForEosDmdIn

Publication 1747-6.5.3 June 1998

OC_WaitForEosDmdIn Blocks the calling thread until a demand input end-of-scan (EOS) notification is

received from the scanner or

msTimeout milliseconds have elapsed.

Syntax:

int OC_WaitForEosDmdIn(HANDLE handle, DWORD msTimeout)

Parameters:

Description:

If a demand input EOS message has been received since the last OCMSG_EOS_DMDIN message was

retrieved with the OC_PollScanner function, OC_WaitForEosDmdIn returns SUCCESS immediately.

You can use this function to synchronize a control application with the I/O scan. See the

OC_EnableEOSNotify and OC_DemandInputScan functions.

Return Value:

Considerations:

Supported in the Windows NT API library only.

Parameter: Description:

handle

Must be a valid handle returned from OC_OpenScanner

msTimeout

Specifies the number of milliseconds to wait

Set to INFINITE to wait forever

Name: Value: Description:

SUCCESS

demand input EOS message was received

ERR_RESPONSE

msTimeout milliseconds elapsed without an EOS

ERR_OCACCESS

handle does not have access to scanner

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 154 155

Brak uwag

Rockwell-automation 1747-PCINT API Software for 1746 I/O Instrukcja Użytkownika Strona 134