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5.5 Safety Measures
5-15
5.5.2 Momentary Power Failures
Operation of momentary power failures
•
-
If the duration of the power failure is less than 10 ms, the FP-XH M8N control unit continues
to operate. If the power is off for 10 ms or longer, operation changes depending on the
combination of units, the power supply voltage, and other factors. (In some cases, operation
may be the same as that for a power supply reset.)
•
-
Although the duration of the power failure for the expansion FP0 adapter is 10 ms, judge
the permissible time for the system after confirming the permissible duration of the power
failure for the DC power supply that supplies power to the expansion FP0 adapter. (Supply
the power to it from the service power supply for the input of the FP-XH M8N control unit.)
•
-
When using the expansion unit with a built-in power supply (E30, expansion FP0 adapter),
depending on the duration of the momentary power failure, either one unit may be without
electricity momentarily and the I/O verify error may occur. In that case, turn off the power
supply and then turn on again.
5.5.3 Watchdog Timer
•
The watchdog timer detects abnormal program or hardware.
•
When using the FP-XH M8N control unit, it is set to 640 ms.
•
The ERR.LED at the front of the controller unit lights up after the watchdog timer is operated.
At this time, the output of all output units turned to OFF and brought to a standstill.
Summary of Contents for FP-XH M8N16PD
Page 1: ......
Page 23: ...1 System Structure ...
Page 39: ...2 Control Unit Specifications ...
Page 48: ...Control Unit Specifications 2 10 ...
Page 49: ...3 I O Allocation ...
Page 77: ...4 Installation ...
Page 89: ...5 Wiring of Power Supply and General purpose I O Parts ...
Page 104: ...Wiring of Power Supply and General purpose I O Parts 5 16 ...
Page 105: ...6 Wiring of Motion I O Parts ...
Page 116: ...Wiring of Motion I O Parts 6 12 ...
Page 117: ...7 Power On Off and Check Items ...
Page 124: ...Power On Off and Check Items 7 8 ...
Page 125: ...8 Steps Before Running ...
Page 142: ...Steps Before Running 8 18 ...
Page 143: ...9 Setting of Position Control Parameters ...
Page 159: ...10 Transfer to Unit and Commissioning ...
Page 181: ...11 Automatic Operation Position Control ...
Page 193: ...11 2 Interpolation Control 11 13 ...
Page 209: ...12 Automatic Operation Synchronous Control ...
Page 251: ...13 Manual Operation JOG Operation ...
Page 256: ...Manual Operation JOG Operation 13 6 ...
Page 257: ...14 Manual Operation Home Return ...
Page 264: ...Manual Operation Home Return 14 8 ...
Page 265: ...15 Pulse Input Function ...
Page 278: ...Pulse Input Function 15 14 ...
Page 279: ...16 Stop Function ...
Page 285: ...17 Auxiliary Function ...
Page 329: ...18 Instruction Reference ...
Page 357: ...19 Error Warning Annunciation Function ...
Page 386: ...Error Warning Annunciation Function 19 30 ...
Page 387: ...20 Troubleshooting ...
Page 402: ...Troubleshooting 20 16 ...
Page 403: ...21 Memory Master Memory Cassette ...
Page 418: ...Memory Master Memory Cassette 21 16 ...
Page 419: ...22 Security Functions ...
Page 430: ...Security Functions 22 12 ...
Page 431: ...23 General purpose Input High speed counter Function ...
Page 448: ...General purpose Input High speed counter Function 23 18 ...
Page 449: ...24 Other Functions ...
Page 452: ...Other Functions 24 4 ...
Page 453: ...25 Maintenance and Inspection ...
Page 457: ...26 Specifications ...
Page 552: ...Specifications 26 96 ...
Page 553: ...Record of changes Manual No Date Record of Changes WUME FPXHM8N16PD 01 Sep 2017 First Edition ...
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