YASKAWA Sigma-7 SGD7S Series

n When you want to reset the multiturn data in the absolute encoder
n When the Servomotor has been replaced
CAUTION!
The multiturn data will be reset to a value between -2 and +2 rotations
when the absolute encoder is reset. The reference position of the
machine system will change. Adjust the reference position in the host
controller to the position that results from resetting the absolute encoder.
If the machine is started without adjusting the position in the host con-
troller, unexpected operation may cause personal injury or damage to the
machine.
– The multiturn data will always be zero in the following cases. It is
never necessary to reset the absolute encoder in these cases. An
alarm related to the absolute encoder (A.810 or A.820) will not occur.
– When you use a single-turn absolute encoder
– When the encoder is set to be used as a single-turn absolute
encoder (Pn002 = n.  2  )
– If a batteryless absolute encoder is used, an A.810 alarm (Encoder
Backup Alarm) will occur the first time the power is turned ON. After
you reset the absolute encoder, the A.810 alarm will no longer occur.
6.16.2 Precautions on Resetting
n You cannot use the Alarm/Warning Clear (Fault Reset) command from the SERVO-
PACK to clear the A.810 alarm (Encoder Backup Alarm) or the A.820 alarm (Encoder
Checksum Alarm). Always use the operation to reset the absolute encoder to clear
these alarms.
n If an A.8 alarm (Internal Encoder Monitoring Alarm) occurs, turn OFF the power
supply to reset the alarm.
6.16.3 Preparations
Always check the following before you reset an absolute encoder.
n The parameters must not be write prohibited.
n The servo must be OFF.
6.16.4 Applicable Tools
The following table lists the tools that you can use to reset the absolute encoder and the
applicable tool functions.
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Resetting the Absolute Encoder > Applicable Tools
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