ABB ACS880-104

374 Parameters
Fault The drive trips on 7510 FBA A communication. This only
occurs if control is expected from the FBA A interface (FBA A
selected as source of start/stop/reference in the currently
active control location), or if supervision is forced using
parameter 50.26 FBA A comm supervision force.
1
Last speed Drive generates an A7C1 FBA A communication warning and
freezes the speed to the level the drive was operating at. This
only occurs if control is expected from the FBA A interface, or
if supervision is forced using parameter 50.26 FBA A 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 A7C1 FBA A 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 A
interface, or if supervision is forced using parameter 50.26
FBA A 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 7510 FBA A communication. This occurs even
though no control is expected from the FBA A interface.
4
Warning Drive generates an A7C1 FBA A communication warning.
This occurs even though no control is expected from the
fieldbus. This only occurs if control is expected from the FBA
A interface, or if supervision is forced using parameter 50.26
FBA A comm supervision force.
WARNING! Make sure that it is safe to continue
operation in case of a communication break.
5
50.03 FBA A comm loss t
out
Defines the time delay before the action defined by parameter
50.02 FBA A 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.
0.3 s
0.3 … 6553.5 s Time delay. 1 = 1 s
50.04 FBA A ref1 type Selects the type and scaling of reference 1 received from
fieldbus adapter A.
Note: Fieldbus-specific communication profiles may use
different scalings. For more information, see the manual of
the fieldbus adapter.
Auto
Auto Type and scaling are chosen automatically according to
which reference chain (see settings Torq ue
, Speed,
Frequency) the incoming reference is connected to. If the
reference is not connected to any chain, no scaling is applied
(as with setting Transparent).
0
Transparent No scaling is applied (the 16-bit scaling is 1 = 1 unit). 1
General Generic reference with a scaling of 100 = 1 (ie. integer and
two decimals).
2
Torque The scaling is defined by parameter 46.03 Torq u e sc al ing .3
Speed The scaling is defined by parameter 46.01 Speed scaling.4
No. Name/Value Description Def/FbEq16