Fault Codes - Siemens Micromaster Operating Instructions Manual

Issue 04/04
5.2
The Encoder Module has only one fault code, which is – F0090. This
condition occurs when the allowed frequency rate of change, set in
P0492[3] is exceeded or when low speed encoder loss is detected.
NOTE
The reason for the encoder loss will be given in the level 3 parameter
P0949:
P0949 = 1 means encoder loss of channel A or channel B or
channel A and channel B at high speed (shaft speed > P0492)
P0949 = 2 means encoder loss of channel A or channel A and
channel B at low speed (shaft speed < P0492)
P0949 = 3 means encoder loss of channel B at low speed
(shaft speed < P0492).
Should the encoder give a fault message F0090 the following remedial
action should be performed:
1. Check that an encoder is fitted. If the encoder is not fitted, set
P0400=0 and select SLVC mode (P1300 = 20 or 22).
2. Check the connections between the encoder and the inverter.
3. Check the encoder is not faulty (select P1300 = 0 and run at a
fixed speed then check the encoder feedback signal using
r0061). Check for correct magnitude and direction of speed.
4. Increase the encoder loss threshold in P0492.
5. Increase encoder low speed loss detection delay in P0494.
MICROMASTER Encoder Module
A5E00146708A2

Fault Codes

Operating Instructions
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