ABB ACSM1 - Page 181

Parameters and firmware blocks
181
(3) LAST SPEED Protection is active. The drive generates alarm FIELDBUS COMM
and freezes the speed to the level the drive was operating at. The
speed is determined by the average speed over the previous 10
seconds.
WARNING! Make sure that it is safe to continue operation in
case of a communication break.
50.03 COMM LOSS T OUT FW block: FIELDBUS (see above)
Defines the time delay before the action defined by parameter 50.02 COMM LOSS FUNC is taken.
Time count starts when the link fails to update the message.
0.3…6553.5 s Delay for fieldbus communication loss function.
50.04 FBA REF1 MODESEL FW block: FIELDBUS (see above)
Selects the fieldbus reference FBA REF1 scaling and the actual value, which is sent to the fieldbus
(FBA ACT1).
(0) RAW DATA No scaling (i.e. data is transmitted without scaling). Source for the
actual value, which is sent to the fieldbus, is selected by parameter
50.06 FBA ACT1 TR SRC.
(1) TORQUE Fieldbus adapter module uses torque reference scaling. Torque
reference scaling is defined by the used fieldbus profile (e.g. with ABB
Drives Profile integer value 10000 corresponds to 100% torque
value). Signal 1.06 TORQUE is sent to the fieldbus as an actual value.
See the User’s Manual of the appropriate fieldbus adapter module.
(2) SPEED Fieldbus adapter module uses speed reference scaling. Speed
reference scaling is defined by the used fieldbus profile (e.g. with ABB
Drives Profile integer value 20000 corresponds to the value of
parameter 25.02 SPEED SCALING). Signal 1.01 SPEED ACT is sent
to the fieldbus as an actual value. See the User’s Manual of the
appropriate fieldbus adapter module.
(3) POSITION Fieldbus adapter module uses position reference scaling. Position
reference scaling is defined by parameters 60.05 POS UNIT and
60.08 POS2INT SCALE. Signal 1.12 POS ACT is sent to the fieldbus
as an actual value.
(4) VELOCITY Fieldbus adapter module uses position speed scaling. Position speed
scaling is defined by parameters 60.10 POS SPEED UNIT and 60.11
POS SPEED2INT. Signal 4.02 SPEED ACT LOAD is sent to the
fieldbus as an actual value.
(5) AUTO One of the above selections is chosen automatically according to the
currently active control mode. See parameter group 34 REFERENCE
CTRL.
50.05 FBA REF2 MODESEL FW block: FIELDBUS (see above)
Selects the fieldbus reference FBA REF2 scaling.
See parameter 50.04 FBA REF1 MODESEL.