ABB ACS 800 Series, Firmware Manual

Page: 202 / 340

Actual signals and parameters
202
FOLLOWER 4 Follower drive 6
STANDBY Follower drive which reads the control signals through a fieldbus interface, not
from the Master/Follower link as usual. 7
60.02 TORQUE SELECTOR Selects the reference used in motor torque control. Typically, the value needs
to be changed only in the Follower station(s).
The parameter is visible only when Master/Follower is active (See Par.
60.01 ).
ZERO This selection forces the output of the torque selector to zero. 1
SPEED The Follower speed controller output is used as a reference for motor torque
control. The drive is speed-controlled. SPEED can be used both in the
Follower and in the Master if
- the motor shafts of the Master and Follower are connected flexibly. (A slight
speed difference between the Master and the Follower is possible/allowed.)
- drooping is used (see parameter
60.06 ).
2
TORQUE The drive is torque-controlled. The selection is used in the Follower(s) when
the motor shafts of the Master and Follower are coupled solidly to each other
by gearing, a chain or other means of mechanical power transmission and no
speed difference between the drives is allowed or possible.
Note: If TORQUE is selected, the drive does not restrict the speed variation as
long as the speed is within the limits defined with parameters 20.01 and 20.02 .
More definite speed supervision is often needed. In those cases, the selection
ADD should be used instead of TORQUE. Par.
11.02 should be EXT2.
3
MINIMUM The torque selector compares the direct torque reference and the speed
controller output, and the smaller of them is used as the reference for the
motor torque control. MINIMUM is selected in special cases only. Par.
11.02
should be EXT2. Speed reference should be connected to EXT1 and torque
reference to EXT2.
4
MAXIMUM The torque selector compares the direct torque reference and the speed
controller output and the greater of them is used as the reference for the motor
torque control. MAXIMUM is selected in special cases only. Par.
11.02 should
be EXT2. Speed reference should be connected to EXT1 and torque reference
to EXT2.
5
ADD The torque selector adds the speed controller output to the direct torque
reference. The drive is torque-controlled in the normal operating range. The
selection ADD, together with the window control, forms a speed supervision
function for a torque-controlled Follower drive. See parameter
60.03 . Par.
11.02 should be EXT2. Speed reference should be connected to EXT1 and
torque reference to EXT2.
6
Index Name/Selection Description FbEq