JVL MIS17 Series User Manual page 172

7.2
7.2.11 Error message 'Encoder lost position'
Message no. / Message
Type / Motor action
Error condition
Possible cause of this error • The reset of the encoder can be caused by a firmware update.
Solutions to avoid error
How to return to normal
operation
Error bit / Firmware name
7.2.12 Error message 'Encoder Reed error'
Message no. / Message
Type / Motor action
Error condition
Possible cause of this error • This can be caused by a mechanical shock on the shaft or an ex-
Solutions to avoid error
How to return to normal
operation
Error bit / Firmware name
172 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS17x, 23x, 34x, 43x
Error messages
8 / 'Encoder lost position'
Unrecoverable error / Motor is set in Passive mode.
The absolute multi turn encoder (H3/H4) has lost the position.
• The battery level is low and the encoder cannot remember the
position.
Hints to optimise the battery lifetime:
1. Avoid to place the motor in an environment with high tempera-
tures.
2. Set the running and especially the standby motor current as low
as possible in order not to heat up the motor unnecessarily.
3. Keep the external power applied as much as possible.
See also Position retention
• Reset the position (special command 354 in register 24), clear
the error bit(s) in register 35 or cycle the power.
• If the battery level is low, this error will re-appear every time after
power has been off for a while. In that case, the motor must be
returned for service.
• A the cause have been a encoder firmware update from an older
version an encoder calibration may probably rescue the motor
from this error state. See
354 for further info
Bit 8
9 / 'Encoder Reed error'
Unrecoverable error / Motor is set in Passive mode.
• The absolute multi turn encoder (H3/H4) has detected a wrong
sequence in the positioning algorithm.
• This error also occurs after firmware update.
ternal magnetic field.
• Because the encoder has been reset during a firmware update.
• Do not place the motor inside a strong magnetic field.
• Do not expose the shaft or the motor for mechanical shocks.
• Reset the position (special command 354 in register 24), clear
the error bit(s) in register 35 or cycle the power.
Bit 9
time, page 126 for further info
Procedure to calibrate encoder, page