ABB ACS880 Firmware Manual page 378

378 Parameters
No. Name/Value
50.26 FBA A comm
supervision force
Bit Name
0 Ext 1
1 Ext 2
2 Local
3...15 Reserved
0000b...0111b
50.31 FBA B enable
Disable
Option slot 1
Option slot 2
Option slot 3
50.32 FBA B comm loss
func
No action
Fault
Last speed
Speed ref safe
Fault always
Description
Activates fieldbus communication monitoring separately for
each control location (see section
control on page 40).
The parameter is primarily intended for monitoring the
communication with FBA A when it is connected to the
application program and not selected as a control source by
drive parameters.
Value
1 = Communication monitoring active when Ext 1 is being used.
1 = Communication monitoring active when Ext 2 is being used.
1 = Communication monitoring active when local control is being
used.
FBA A communication monitoring selection.
Enables/disables communication between the drive and
fieldbus adapter B, and specifies the slot the adapter is
installed into.
Communication between drive and fieldbus adapter B
disabled.
Communication between drive and fieldbus adapter B
enabled. The adapter is in slot 1.
Communication between drive and fieldbus adapter B
enabled. The adapter is in slot 2.
Communication between drive and fieldbus adapter B
enabled. The adapter is in slot 3.
Selects how the drive reacts upon a fieldbus communication
break. The time delay is defined by parameter
comm loss timeout.
No action taken.
Communication break detection active. Upon a
communication break, the drive trips on a
communication fault and coasts to a stop.
Communication break detection active. Upon a
communication break, the drive generates a warning
FBA B communication) and freezes the speed to the level
the drive was operating at. The speed is determined on the
basis of actual speed using 850 ms low-pass filtering.
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
Communication break detection active. Upon a
communication break, the drive generates a warning
FBA B communication) and sets the speed to the value
defined by parameter 22.41 Speed ref safe
Frequency ref safe when frequency reference is being
used).
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
Drive trips on 7520 FBA B
though no control is expected from the fieldbus.
Local control vs. external
50.33 FBA B
7520 FBA B
(or 28.41
communication. This occurs even
Def/FbEq16
0000b
1 = 1
Disable
0
1
2
3
No action
0
1
2
(A7C2
3
(A7C2
4