ABB ACS880-11 - Page 345

Parameters 345
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 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.
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
50.04 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 Torque, 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 16-bit scaling of 100 = 1 (ie. integer
and two decimals).
2
Torque The scaling is defined by parameter 46.03
Torque scaling.3
Speed The scaling is defined by parameter 46.01 Speed scaling.4
Frequency The scaling is defined by parameter 46.02 Frequency scaling.5
No. Name/Value Description Def/FbEq16