Siemens MICROMASTER 440 Operating Instructions Manual page 79

Issue B1
Fault Possible Causes
CB (communication board) specific
A0702
CB warning 3
CB (communication board) specific
A0703
CB warning 4
CB (communication board) specific
A0704
CB warning 5
CB (communication board) specific
A0705
CB warning 6
CB (communication board) specific
A0706
CB warning 7
CB (communication board) specific
A0707
CB warning 8
CB (communication board) specific
A0708
CB warning 9
CB (communication board) specific
A0709
CB warning 10
Communication with CB
A0710
(communication board) is lost
CB communi-
cation error
CB (communication board) reports a
A0711
configuration error.
CB configu-
ration error
Vdc max controller has been de-
A0910
activated, since controller is not
Vdc-max
capable of keeping DC-link voltage
controller de-
(r0026) within limits (P2172).
activated
Ø Occurs if main supply voltage
(P0210) is permanently too high.
Ø Occurs if motor is driven by an
active load, causing motor to
goes into regenerative mode.
Ø Occurs at very high load inertias,
when ramping down.
Vdc max controller is active; so ramp-
A0911
down times will be increased
Vdc-max
automatically to keep DC-link voltage
controller
(r0026) within limits (P2172).
active
Vdc min controller will be activated if
A0912
DC-link voltage (r0026) falls below
Vdc-min
minimum level (P2172).
controller
Ø The kinetic energy of the motor is
active
used to buffer the DC-link
voltage, thus causing
deceleration of the drive!
Ø So short mains failures do not
necessarily lead to an
undervoltage trip.
ADC parameters should not be set to
A0920
identical values, since this would
ADC
produce illogical results.
parameters
Ø Index 0: Parameter settings for
not set
properly
Ø Index 1: Parameter settings for
Ø Index 2: Parameter settings for
MICROMASTER 440 Operating Instructions
6SE6400-5AC00-0BP0
Diagnose & Remedy
See CB user manual
See CB user manual
See CB user manual
See CB user manual
See CB user manual
See CB user manual
See CB user manual
See CB user manual
Check CB hardware
Check CB parameters
Check the following:
1. Input voltage (P0756) lies within range?
2. Load must match
In certain cases apply braking resistor.
1. Check parameter inverter input voltage
2. Check ramp-down times
Analogue input parameters should not be set to
the same value as each other
output identical
input identical
input do not correspond
to ADC type
7 MICROMASTER 440 specifications
Reac-
tion
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