Siemens SINUMERIK 840D sl Function Manual page 367

03.06
In this case, the motor must be replaced carefully observing the Description, mo-
tor with absolute value encoder. This is because it is necessary to re-calibrate
the absolute value encoder. When re-calibrating the system, we recommend that
you permanently select the 1st position measuring system and the axis is only tra-
versed using the motor measuring system.
Replacing the encoder modules
When replacing the encoder modules (SMC, SME) or when replacing motors with
integrated encoders (motor with DRIVE-CLiQ), a change to the configuration of the
safety-relevant components is detected, and a request is made that a service per-
son acknowledges this.
After replacing at least one of these components, Alarm 27032 is output "Axis %1
checksum error %2 safety monitoring. Acknowledgement and acceptance test re-
quired!" – with alarm ID 1 (changed CRC in index 1 of $MA_SAFE_ACT_CHECK-
SUM[ ] –––> hardware IDs changed).
If, when this error message is output, an encoder module has just been replaced,
this error message can be acknowledged using the softkey "Acknowledge SI data"
and the softkey "Drive/NCK reset".
The user can suppress the automated internal actual value check by resetting the
"user agreement" – therefore requesting that the axis is re-calibrated with the ap-
propriate user agreement.
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
Commissioning
9.6 Replacing a motor or encoder
9-367