Rockwell Automation Publication 2198-UM004D-EN-P - December 2022 211
Chapter 9 Tuning
Alarms Related to Autotuning
When using Autotune: Motion Command from External Source, the operation
cycle (such as acceleration, constant speed, and deceleration) and dwell time
are vital to the correct execution of the Autotune test. See Figure 88
.
Figure 88 - Settings Required for Autotuning
If any of these settings are not correct, the servo drive stops and displays a
fault. See Table 78
for possible causes and solutions.
Acc. time
Max.
speed
Dwell
Operation
cycle
Operation
cycle
Speed
Time
Table 78 - Faults Related to Autotuning
Fault Code Fault Name Possible Causes Possible Solutions
E 08A Autotuning command error
The external source command was not issued. Check the external source command.
Cable connection error. Check the cable connection.
Position 1 and 2 were the same when command was
issued.
Reconfigure position 1 and 2.
E 08B Dwell time too short Dwell time too short.
Setting the dwell time is required. Increase the dwell time to more than
1 second.
E 08C Inertia estimation error
Acceleration/deceleration time was too long.
Verify that the acceleration/deceleration time for motor to start from
0…3000 rpm is within 1.5 sec.
Speed is too slow.
The lowest possible speed setting is 200 rpm. The maximum speed is
3000 rpm, set the value as high as your application allows.
Inertia mismatch. Verify that load inertia is not more than 50 times the motor inertia.
Inertia variation is too vigorous. Resize the system requirements.
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