HNC Electric SV-E3 Series, Instruction Manual

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7. About alarms
The alarms in absolute system are shown below.
Relative to the incremental system alarm items, the absolute system adds the items of encoder error(( Err. 18)), multi-rotation
data error ((Er r. 2 0) and encoder low-voltage error(Err. 21). These alarms cannot be cleared by alarm resetting or restarting
the 24VDC control power. Restart the control power supply after encoder clearing.
Check the alarms on the [State display] screen
Table 9 Check the alarms on the [State display] screen
No. Alarm items Description
・
handling ways
18 Encoder error The encoder itself error occurs.
20 Multi-rotation data error
☆
The multi-rotation data changes sharply.
☆
Check the encoder cable wiring and PIN contact
☆
Perform FG grounding and countermeasures such as separation of power
cable and encoder cable.
21 Encoder low-voltage error
☆
The multi-rotation data changes sharply.
☆
Check if the battery voltage is too low for the absolute or battery cable loosen
For alarm details of the encoder, refer to the [Encoder] on the [Auxiliary function] screen.
Table 10 Alarm details for the encoder
No. Alarm items Description
・
handling ways
0 Speed error The multi-rotation ABS sensor conversion error occurs at backup or speed error
occurs at power ON
1 MR Low battery voltage warning
2 Multi-rotation ABS Sensor communication error, cannot get the multi-rotation data at power ON.
3 Position error The sensor error results in the different value between the 1-rotation ABS sensor
and multi-rotation ABS sensor, which unable to confirm the encoder position.
4 Low –voltage error Only for multi-rotation ABS encoder
The supply voltage is under the voltage specification described in the manual at
power OFF.