12-12
12-3 Errors
OMNUC G5-series AC Servomotors and Servo Drives User’s Manual (with Built-in EtherCAT Communications)
12
Troubleshooting and Maintenance
Immediate Stop Operation
Precautions for Correct Use
 To prevent operation from running out of control for an immediate stop, set the allowable
Overspeed Detection Level Setting at Immediate Stop (3615 hex). An Overspeed 2 Error (Error
No. 26.1) does not support immediate stopping. If it occurs, an error trip will occur immediately.
 Set a higher value for the Overspeed Detection Level Setting at Immediate Stop (3615 hex) than
for the Overspeed Detection Level Setting (3513 hex). If a value lower than the Overspeed
Detection Level Setting (3513 hex) is set, an Overspeed 2 Error (Error No. 26.1) will occur before
an Overspeed Error (Error No. 26.0). Thus an immediate stop will not occur. If an Overspeed Error
(Error No. 26.0) and an Overspeed 2 error (Error No. 26.1) occur at the same time, the immediate
stop will not occur, either.
 If the actual rotation speed is not lower than 30 r/min after the time set on the Error Detection
Allowable Time Setting (3614 hex) elapses from when an error that supports immediate stopping
occurs, an error state will occur immediately.
 If an error that does not support immediate stopping occurs during an immediate stop, an error
state will occur immediately.
Torque limit
Speed
[r/min]
Time
Error state (Operation after stopping:
Dynamic brake/free)
Immediate
stop operation
Normal operation
(Command from the Host)
Speed
command
Motor speed
Normal torque limitNormal torque limit
Error occurs for immediate stopNo errorError
Speed
deemed
as stop
[30 r/min]
Immediate stop time
Overspeed
protection
threshold
Normal operationNormal operation
Overspeed Detection Level Setting at Immediate Stop
(3615 hex) (to protect again runaway for immediate stops)
Immediate Stop Torque (3511 hex)
(measure to reduce shock for immediate stops)
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