Siemens 440 manual A0920 ADC parameters not correctly set, A0921 DAC parameters not set properly

Models: 440

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Issue 01/06

Faults and Alarms

A0920 ADC parameters not correctly set

Cause

ADC parameters should not be set to identical values, as this would lead to illogical results.

-Index 0: Parameter settings for output identical.

-Index 1: Parameter settings for input identical.

-Index 2: Parameter settings for input do not correspond to ADC type.

A0921 DAC parameters not set properly

Cause

-DAC parameters (P0777 and P0779) have identical values.

OR

-DAC parameters (P0778 and P0780) have identical values. Identical values would produce illogical results.

Diagnosis & Remedy

Check the following:

-Output parameter settings. Ensure P0777 and P0779 are not identical.

-Input parameter settings. Ensure P0778 and P0780 are not identical.

A0922 No load at the inverter

Cause

-no load is connected to the inverter.

-therefore several functions can run differently than under normal load conditions.

A0923 JOG counter-clockwise as well as JOG clockwise are requested

Cause

-both JOG clockwise and JOG counter-clockwise (P1055/P1056) have been requested. This is the reason that the RFG output frequency has been frozen to the actual value.

A0952 Load fault detected

Cause

-load conditions at the motor indicate a load fault or mechanical fault.

Diagnosis & Remedy

Please check the following:

-no braking, failure or destruction of the mechanical transmission line

-if required, lubricate the mechanical transmission line.

If you are using an external encoder, please check the following parameter settings:

-P2192 (delay time, load torque monitoring)

If you are using a specific speed range, then please check the following:

-P2182 (load torque monitoring F1)

-P2183 (load torque monitoring F1f2)

-P2184 (load torque monitoring F1f3)

-P2185 (upper torque threshold 1)

-P2186 (lower torque threshold 1)

-P2187 (upper torque threshold 2)

-P2188 (lower torque threshold 2)

-P2189 (upper torque threshold 3)

-P2190 (lower torque threshold 3)

-P2192 (delay time, load torque monitoring)

A0936 PID auto tuning active

Cause

-PID auto tuning (P2350) is selected or is presently running.

Diagnosis & Remedy

-after automatic PID optimization has been completed, the alarm is reset.

MICROMASTER 440

Parameter List

6SE6400-5BB00-0BP0

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Siemens 440 A0920 ADC parameters not correctly set, A0921 DAC parameters not set properly, A0922 No load at the inverter