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94
Common Functions
Section 5-1
Note
(1) The Total ON Time Monitor function (Time) and Contact Operation
Counter function (Count) cannot be used simultaneously on one bit. Se-
lect one of these functions with the Maintenance Counter Mode Choice
setting.
(2) When the Maintenance Counter Mode Choice setting is changed, the col-
lected data (operations count or total ON time) will be cleared.
(3) These functions do not operate when the I/O power supply is OFF.
(4) The Total ON Time Monitor function checks whether the connected de-
vice is ON at about 1-s intervals. This function may not count the total ON
time precisely if the device is ON for intervals of less than 1 second.
■
Calculating the Total ON Time with 0.5-s ON Pulses
In figure A, the bit is actually ON for 0.5 s
×
3 = 1.5 s, but the bit is ON just
once when the status is checked, so the total ON time is measured as 1 s.
In figure B, the bit is actually ON for 0.5 s
×
3 = 1.5 s, but the bit is ON twice
when the status is checked, so the total ON time is measured as 2 s.
■
Calculating the Total ON Time with 1.5-s ON Pulses
In figure C, the bit is actually ON for 1.5 s
×
2 = 3 s, but the bit is ON four times
when the status is checked, so the total ON time is measured as 4 s.
Figure A
0.5 s
Measured about 1 time/second
Figure B
0.5 s
Measured about 1 time/second
Figure C
1.5 s
Measured about 1 time/second
Summary of Contents for NE1A-SCPU01 - 07-2009
Page 3: ...iv...
Page 9: ...x TABLE OF CONTENTS...
Page 11: ...xii...
Page 15: ...xvi...
Page 70: ...35 Installation Section 3 1 Top Top Bottom Bottom...
Page 72: ...37 Installation Section 3 1 3 1 3 Dimensions and Weight Dimensions NE1A SCPU01 V1...
Page 85: ...50 Wiring Section 3 2...
Page 123: ...88 Explicit Message Communications Section 4 7...
Page 141: ...106 Safety Outputs Section 5 4...
Page 257: ...222 Connection Status Tables Section 10 8...
Page 261: ...226 NE1A series Controller Replacement Section 11 2...
Page 264: ...229 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 266: ...231 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 267: ...232 Appendix A Local Output Setting Example...
Page 269: ...234 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 270: ...235 Appendix A Local Output Setting Example...
Page 273: ...238 Appendix A Local Input and Test Output Setting Example Local Output Setting Example...
Page 275: ...240 Appendix A Programming Example Local Input and Test Output Setting Example...
Page 276: ...241 Appendix A Local Output Setting Example...
Page 289: ...254...
Page 293: ...258 Index...