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5.2
Distance meter fault (system failure)
This system failure is detected when a communication error occurs between the inverter and the distance meter, or when the
data sent from the distance meter is unreliable. Set Pr.393 System failure detection to enable detection of distance meter
faults. (For details of system failure, refer to the Logistics/Transport Function Manual.)
<Occurrence condition 1>
When unreliable data is received from the SSI device consecutively for 30 ms
If one of the following conditions is satisfied, the distance measurement is regarded as faulty since the data is unreliable. The
current position information is not updated during the fault.
• A cable break is detected.
• Error is detected in the SSI communication error data according to the polarity setting.
• The value of the received position data is larger than "2147483648" (2 to the 31st power).
NOTE
• Enable detection of distance meter faults to stop the inverter when a cable break occurs since there is a possibility
that an incorrect current position data is held.
<Occurrence condition 2>
The start command turns ON when the normal data has never been sent from the distance meter.
Laser distance meter
Power of inverter
Power of laser
distance meter
Power of inverter
Operating status
System failure signal
(Laser distance meter fault)
The first communication data is not sent from
the laser distance meter.
Stopped
Operating
Stopped
TROUBLESHOOTING
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