Siemens A07454

What the Fault Means

Alarm: LR: Position actual value preprocessing does not have a valid encoder

Likely causes

• an encoder is not assigned for the position actual value preprocessing (p2502 = 0).
• an encoder is assigned, but no encoder data set (p0187 = 99 or p0188 = 99).
• an encoder an an encoder data set have been assigned, however, the encoder data set does not contain any

Solution and Safe First Checks

1. Check the drive data sets, encoder data sets and encoder assignment.

Safety: do not work inside the panel without isolating the power; if unsure, consult a qualified technician.

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