ABB ACS880-x04, Firmware Manual, Page: 349 / 604

Parameters 349
Option slot 2 Communication between drive and fieldbus adapter B
enabled. The adapter is in slot 2. 2
Option slot 3 Communication between drive and fieldbus adapter B
enabled. The adapter is in slot 3. 3
50.32 FBA B comm loss
func Selects how the drive reacts upon a fieldbus communication
break. A time delay for the action can be defined by parameter
50.33 FBA B comm loss timeout .
See also parameter 50.56 FBA B comm supervision force .
No action
No action No action taken. 0
Fault Drive trips on 7520 FBA B communication . This only occurs if
control is expected from the FBA B interface (FBA B selected
as source of start/stop/reference in the currently active control
location), or if supervision is forced using parameter
50.56
FBA B comm supervision force .
1
Last speed Drive generates an A7C2 FBA B communication warning and
freezes the speed to the level the drive was operating at. This
only occurs if control is expected from the FBA B interface, or
if supervision is forced using parameter
50.56 FBA B comm
supervision force .
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.
2
Speed ref safe Drive generates an A7C2 FBA B communication warning and
sets the speed to the value defined by parameter 22.41 Speed
ref safe (when speed reference is being used) or 28.41
Frequency ref safe (when frequency reference is being used).
This only occurs if control is expected from the FBA B
interface, or if supervision is forced using parameter
50.56
FBA B comm supervision force .
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
3
Fault always Drive trips on 7520 FBA B communication . This occurs even
though no control is expected from the FBA B interface.
4
Warning Drive generates an A7C2 FBA B communication warning.
This only occurs if control is expected from the FBA B
interface, or if supervision is forced using parameter
50.56
FBA B comm supervision force .
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
5
50.33 FBA B comm loss
timeout Defines the time delay before the action defined by parameter
50.32 FBA B comm loss func is taken. Time count starts when
the communication link fails to update the message.
As a rule of thumb, this parameter should be set to at least 3
times the transmit interval of the master.
Note: There is a 60-second boot-up delay immediately after
power-up. During the delay, the communication break
monitoring is disabled (but communication itself can be
active).
0.3 s
0.3 … 6553.5 s Time delay. 1 = 1 s
50.34 FBA B ref1 type Selects the type and scaling of reference 1 received from
fieldbus adapter B.
See parameter
50.04 FBA A ref1 type .
Auto
No. Name/Value Description Def / FbEq16