![background image](http://html1.mh-extra.com/html/omron/sysmac-cp1h/sysmac-cp1h_operation-manual_741321126.webp)
92
Power OFF Operation
Section 2-6
2.
A momentary power interruption that lasts more than 10 ms for AC power
or more than 2 ms for DC power may or may not be detected.
The following timing chart shows the CPU Unit power OFF operation in more
detail.
Power OFF Timing Chart
Description of Operation
Power OFF will be detected if the 100 to 240 V AC power supply falls below
85% of the rated voltage or the DC power supply falls below 90% of the rated
voltage for the power OFF detection time (10 ms minimum for AC power and
2 ms minimum for DC power). The CPU reset signal will turn ON while the
internal power supply is being held and the CPU Unit will be reset.
Note
The CP1H CPU Unit cannot use the power OFF interrupt task and cannot set
the power OFF detection delay time.
2-6-2
Instruction Execution for Power Interruptions
If power is interrupted and the interruption is detected when the CPU Unit is
operating in RUN or MONITOR mode, the instruction currently being executed
will be completed and then the CPU Unit will be reset.
10 ms
0
85% of the rated voltage or less for AC power
90% of the rated voltage or less or DC power
0 to 10 ms for AC
0 to 2 ms for DC
Greater than 10 ms for AC
Greater than 2 ms for DC
Operation will continue or stop
depending on whether or not a
momentary power interruption is
detected.
Power supply
voltage
Power supply
voltage
Time
Momentary power
interruption not detected
and operation continues.
Power OFF detection time:
The time from when the power supply voltages drops to 85% or less of the rated
voltage for AC power or 90% for DC power until the power OFF condition is detected.
Holding time for 5 V internal power supply after power OFF detection:
The maximum time that the 5 V internal power supply voltage will be maintained after
the power OFF condition is detected. The holding time is fixed at 1 ms.
AC: 85% of rated voltage
DC: 90% of rated voltage
Operation always stopped
at this point regardless.
Power OFF detected signal
Program execution status
CPU reset signal
Cyclic tasks or interrupt tasks
Stopped
Power OFF detected
Power OFF Detection
Delay Time
AC: 10 ms
DC: 2 ms
Holding time for 5 V internal
power supply after power
OFF detection: 1 ms
Summary of Contents for Sysmac CP1H
Page 2: ......
Page 3: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised October 2014...
Page 4: ...iv...
Page 10: ...x...
Page 18: ...xviii...
Page 22: ...xxii...
Page 34: ...xxxiv Conformance to EC Directives 6...
Page 76: ...42 Function Blocks Section 1 5...
Page 176: ...142 CP series Expansion I O Unit Wiring Section 3 6...
Page 372: ...338 Analog I O XA CPU Units Section 5 5...
Page 578: ...544 Trouble Shooting Section 8 7...
Page 622: ...588 Sample Application Section 9 12 Network Settings Network Tab Network Settings Driver Tab...
Page 668: ...634 Standard Models Appendix A...
Page 744: ...710 Auxiliary Area Allocations by Address Appendix D...
Page 771: ...737 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 772: ...738 Connections to Serial Communications Option Boards Appendix F...
Page 800: ...766 Specifications for External Power Supply Expansion Appendix H...
Page 806: ...772 Index W Work Area 165 work bits 165 work words 165 write protection 379...
Page 808: ...774 Revision History...
Page 809: ......