Operating instructions

MM420 Parameter List 04/02
MICROMASTER 420 Parameter List
138 6SE6400-5BA00-0BP0
Fault Possible Causes Diagnose & Remedy Reac-
tion
A0710
CB communi-
cation error
Communication with CB
(communication board) is lost
Check CB hardware --
A0711
CB configu-
ration error
CB (communication board) reports a
configuration error
Check CB parameters --
A0910
Vdc-max
controller de-
activated
Vdc max controller has been de-
activated, since controller is not
capable of keeping DC-link voltage
(r0026) within limits (P2172)
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
Check the following:
1. Input voltage (P0756) lies within range?
2. Load must match
In certain cases apply braking resistor
--
A0911
Vdc-max
controller
active
Vdc max controller is active; so ramp-
down times will be increased
automatically to keep DC-link voltage
(r0026) within limits (P2172)
1. Check parameter inverter input voltage
2. Check ramp-down times
--
A0912
Vdc-min
controller
active
Vdc min controller will be activated if
DC-link voltage (r0026) falls below
minimum level (P2172)
Ø The kinetic energy of the motor
is 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
--
A0920
ADC
parameters
not set
properly
ADC parameters should not be set to
identical values, since this would
produce illogical results.
Ø Index 0: Parameter
settings for output
identical
Ø Index 1: Parameter
settings for input
identical
Ø Index 2: Parameter
settings for input do not
correspond to ADC type
Analogue input parameters should not be set to
the same value as each other
--
A0921
DAC
parameters
not set
properly
DAC parameters should not be set to
identical values, since this would
produce illogical results.
Ø Index 0: Parameter settings for
output identical
Ø Index 1: Parameter settings for
input identical
Ø Index 2: Parameter settings for
output do not correspond
to DAC type
Analogue Output parameters should not be set to
the same value as each other
--
A0922
No load
applied to
inverter
Ø No Load is applied to the
inverter
Ø As a result, some functions may
not work as under normal load
conditions
Low output voltage eg when 0 boost
applied at 0 Hz
1. Check that load is applied to the inverter
2. Check motor parameters correspond to motor
attached
3. As a result, some functions may not work
correctly, because there is no normal load
condition
--
A0923
Both JOG Left
and JOG Right
are requested
Both JOG right and JOG left
(P1055/P1056) have been requested.
This freezes the RFG output
frequency at its current value. JOG
right and JOG left signals active
together
Make sure that JOG right and JOG left signals
are not applied simultaneously
--