Rockwell-automation 1747-PCINT API Software for 1746 I/O Manual de usuario Pagina 131
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OC_WaitForDII Library of Routines 6–77
Publication 1747-6.5.3 June 1998
OC_WaitForDII Blocks the calling thread until a DII interrupt is received from the scanner or
msTimeout milliseconds have elapsed.
Syntax:
int OC_WaitForDII(HANDLE handle, DWORD msTimeout)
Parameters:
Description:
If a DII has been received since the last OCMSG_DIINT message was retrieved with the OC_PollScanner
function, OC_WaitForDII returns SUCCESS immediately.
Return Value:
Considerations:
Supported in the Windows NT API library only.
Example:
HANDLE handle;
intrc;
MSGBUF diiMSG
/* Wait for 10 seconds for a DII */
rc = OC_WaitForDII(handle, 10000);
switch(rc) {
case SUCCESS:/* got a DII */
/* fetch the DII message */
OC_PollScanner (handle,OCMSG_DIINT,&diiMSG);
break;
case ERR_OCRESPONSE:/* timed out */
printf(“\nTimed out waiting for DII\n”);
break;
default;
printf(“\nError!\n”);
break;
}
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
0
a DII was received
ERR_RESPONSE
10
msTimeout milliseconds elapsed without a DII
ERR_OCACCESS
2
handle does not have access to scanner
- API Software for 1
- 1746 I/O PCI 1
- Interface 1
- Allen-Bradley 1
- Important User 2
- Information 2
- Using This Manual 3
- Preface–2 Using This Manual 4
- Table of Contents 5
- Configuring I/O 6
- Chapter 5 6
- Error Codes Appendix A 7
- Overview 9
- The 1746 I/O PCI 10
- Interface API 10
- Understanding 11
- Architecture 11
- 1–4 Overview 12
- Installing the 13
- Windows NT API 14
- Installation Details 15
- 1–8 Overview 16
- Using the API 17
- DOS Considerations 18
- 2–4 Using the API 20
- 2–6 Using the API 22
- Developing Applications 27
- Programming 28
- Sequence 28
- Initialize the scanner 29
- Configure the scanner 29
- 3–4 Developing Applications 30
- Scan I/O 31
- Example for DOS 32
- Developing Applications 3–7 33
- 3–8 Developing Applications 34
- Developing Applications 3–9 35
- 3–10 Developing Applications 36
- Developing Applications 3–11 37
- Example for 38
- Windows NT 38
- Developing Applications 3–13 39
- 3–14 Developing Applications 40
- Developing Applications 3–15 41
- 3–16 Developing Applications 42
- Developing Applications 3–17 43
- 3–18 Developing Applications 44
- Developing Applications 3–19 45
- 3–20 Developing Applications 46
- Using the API Structures 47
- Configuring I/O Modules 49
- 5–2 Configuring I/O Modules 50
- Using M0-M1 Files 51
- Supported I/O 52
- 5–6 Configuring I/O Modules 54
- Library of Routines 55
- OCIOCFG structure 61
- Return Value: 101
- Considerations: 101
- Example: 101
- MsgFilter 104
- MsgFilter is: 104
- WORD len); 111
- of the module in the slot 113
- and len are ignored 113
- Description: 115
- (*callback)() ); 129
- This example is for DOS only 130
- Parameters: 142
- Appendix 147
- Extended Error 148
- B–2 Testing Function Calls 152
- Publication Problem Report 153
- BUSINESS REPLY MAIL 154
- Worldwide representation 155
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