Siemens SIMOVERT MASTERDRIVES Manual page 699

05.2006
Rotation with the
power off
NOTE
NOTE
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
Besides tracking encoder overflows, the block monitors whether the
drive is rotated or runs down while no power is supplied to the
electronics.
A position can be reproduced only if the number of revolutions made
with the power off corresponds to less than half of the encoder range.
For example, in the case of standard encoder EQN 1325 this is 2048
motor revolutions.
The "Position tracking for motor encoder" (function diagram 327) and
"Position tracking for external encoder" (function diagram 333) blocks
are released only for EQN1325 encoders with 2048 lines.
With software version 2.30 and higher, all parameters available for
selection in parameter P147.1 or P147.02 can be used.
Compendium Motion Control
Technology Option F01
9-51