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114
Function Block Editing
Section 6-3
Discrepancy Time
If the function block input type is set to Dual Channel Equivalent or Dual
Channel Complementary, the discrepancy time (i.e., the time between
changes in the inputs) can be evaluated.
The time between when one of the dual-channel inputs changes until the
other one changes is monitored. If the second dual-channel input does not
change before the discrepancy time expires, an error will occur and the Out-
put Enable output from the function block will not turn ON.
The dual channel modes can be used to detect faults in safety devices and
safety device wiring monitored by the function block.
The time between changes in the inputs will not be monitored if the discrep-
ancy time is set to 0.
The discrepancy time is evaluated both when the input signals go from active
to inactive and from inactive to active.
■
Normal Operation Example for Dual Channel Equivalent Setting
Dual channel mode
Input signals
Input signal status
Input
1
Input
2
Dual Channel Equivalent
• Input 1: NC
• Input 2: NC
0
0
Inactive
0
1
Discrepant
1
0
Discrepant
1
1
Active
Dual Channel Complementary
• Input 1: NC
• Input 2: NO
0
0
Discrepant
0
1
Inactive
1
0
Active
1
1
Discrepant
Discrepancy time
Input 1
Input 2
Discrepancy time
Output
Enable
Discrepancy Normal
Error
Содержание NE1A-SCPU01 - 07-2009
Страница 2: ...NE1A Series Safety Network Controller NE1A SCPU01 V1 SCPU02 Operation Manual Revised September 2006...
Страница 3: ...iv...
Страница 9: ...x TABLE OF CONTENTS...
Страница 11: ...xii...
Страница 15: ...xvi...
Страница 33: ...xxxiv Unit Versions of NE1A series Controllers 7 Click the OK Button This completes the procedure...
Страница 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Страница 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Страница 73: ...38 Installation Section 3 1 NE1A SCPU02 Weight Model Weight NE1A SCPU01 V1 460 g max NE1A SCPU02 690 g max...
Страница 85: ...50 Wiring Section 3 2...
Страница 123: ...88 Explicit Message Communications Section 4 7...
Страница 141: ...106 Safety Outputs Section 5 4...
Страница 257: ...222 Connection Status Tables Section 10 8...
Страница 258: ...223 SECTION 11 Maintenance and Inspection 11 1 Inspection 224 11 2 NE1A series Controller Replacement 225...
Страница 261: ...226 NE1A series Controller Replacement Section 11 2...
Страница 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Страница 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Страница 267: ...232 Appendix A Local Output Setting Example...
Страница 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Страница 270: ...235 Appendix A Local Output Setting Example...
Страница 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Страница 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Страница 276: ...241 Appendix A Local Output Setting Example...
Страница 289: ...254...
Страница 293: ...258 Index...