ABB ACH550-UH-011A-6, User Manual

Page: 249 / 478

244 Parameter listing and descriptions
ACH550-01 User's Manual
Group 30: FAULT FUNCTIONS
This group defines situations that the drive should recognise as
potential faults and how the drive should respond if the fault is
detected.
Code Description Range
3001 AI<MIN FUNCTION 0…3
Defines the drive response if the analogue input (
AI
) signal drops below
the fault limits and
AI
is used:
• as the active reference source ( Group 11: REFERENCE SELECT )
• as the Process or External PID controllers' feedback or setpoint
source ( Group 40: PROCESS PID SET 1 , Group 41: PROCESS PID
SET 2 or Group 42: EXT / TRIM PID ) and the corresponding PID
controller is active.
3021
AI
1
FAULT LIMIT
and 3022
AI
2
FAULT LIMIT
set the minimum limits.
0 =
NOT SEL
– No response.
1 =
FAULT
– Displays a fault (7,
AI
1
LOSS
or 8,
AI
2
LOSS
) and the drive
coasts to stop.
2 =
CONST SP
7 – Displays an alarm (2006,
AI
1
LOSS
or 2007,
AI
2
LOSS
)
and sets the speed using 1208
CONST SPEED
7.
3 =
LAST SPEED
– Displays an alarm (2006,
AI
1
LOSS
or 2007,
AI
2
LOSS
)
and sets the speed using the last operating level. This value is the
average speed over the last 10 seconds.
WARNING! If you select
CONST SP
7 or
LAST SPEED
, make sure that
continued operation is safe when the analogue input signal is lost.
3002 PANEL COMM ERR 1…3
Defines the drive response to a control panel (operator keypad)
communication error.
1 =
FAULT
– Displays a fault (10,
PANEL LOSS
) and the drive coasts to
stop.
2 =
CONST SP
7 – Displays an alarm (2008,
PANEL LOSS
) and sets the
speed using 1208
CONST SPEED
7.
3 =
LAST SPEED
– Displays an alarm (2008,
PANEL LOSS
) and sets the
speed using the last operating level. This value is the average speed
over the last 10 seconds.
WARNING! If you select
CONST SP
7 or
LAST SPEED
, make sure that
continued operation is safe when the control panel communication
is lost.
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