ABB ACS350 Series, User Manual

Page: 201 / 314

Actual signals and parameters
201
LAST SPEED Protection is active. The drive generates alarm IO COMM and freezes the
speed to the level the drive was operating at. The speed is determined by the
average speed over the previous 10 seconds.
WARNING ! Make sure that it is safe to continue operation in case of
a communication break.
3
3019 COMM FAULT TIME Defines the time delay for the fieldbus communication break supervision. See
parameter
3018 COMM FAULT FUNC.
3
0.0...60.0 s Delay time 1 = 0.1 s
3021 AI1 FAULT LIMIT Defines a fault level for analog input AI1. If parameter 3001 AI<MIN
FUNCTION is set to FAULT, the drive trips on fault AI1 LOSS, when the
analog input signal falls below the set level.
Do not set this limit below the level defined by parameter
1301 MINIMUM
AI1.
0
0.0…100.0% Value in percent of the full signal range 1 = 0.1%
3022 AI2 FAULT LIMIT Defines a fault level for analog input AI2. If parameter 3001 AI<MIN
FUNCTION is set to FAULT, the drive trips on fault AI2 LOSS, when the
analog input signal falls below the set level.
Do not set this limit below the level defined by parameter
1304 MINIMUM
AI2.
0
0.0…100.0% Value in percent of the full signal range 1 = 0.1%
3023 WIRING FAULT Selects how the drive reacts when incorrect input power and motor cable
connection is detected (i.e. the input power cable is connected to the motor
connection of the drive).
Note: Changing this parameter setting is not recommended in normal use.
The protection is to be disabled only with corner-grounded delta power
systems and very long cables.
ENABLE
DISABLE No action 0
ENABLE The drive trips on fault OUTP WIRING. 1
31 AUTOMATIC RESET Automatic fault reset. Automatic resets are possible only for certain fault
types and when the automatic reset function is activated for that fault type.
3101 NR OF TRIALS Defines the number of automatic fault resets the drive performs within the
time defined by parameter
3102 TRIAL TIME.
If the number of automatic resets exceeds the set number (within the trial
time), the drive prevents additional automatic resets and remains stopped.
The drive must be reset from control panel or from a source selected by
parameter
1604 FAULT RESET SEL.
Example: Three faults have occurred during the trial time defined by
parameter 3102 . Last fault is reset only if the number defined by parameter
3101 is 3 or more.
0
0…5 Number of the automatic resets 1 = 1
3102 TRIAL TIME Defines the time for the automatic fault reset function. See parameter 3101
NR OF TRIALS.
30
1.0…600.0 s Time 1 = 0.1 s
Parameters – complete descriptions
Index Name/Selection Description Def, FbEq
X X X
t
Trial time
x = Automatic reset