ABB DCS550 - Page 211

211
Signal and parameter list
3ADW000379R0501 DCS550 Manual e e
Signal / Parameter name
min.
max.
def.
unit
23.09 WinWidthNeg (negative window width)
Negative speed limit for the window control, when the speed error (
∆n = n
ref
- n
act
) is negative.
Internally limited from:
rpmtorpm
20000
32767
*)29.2(
20000
32767
*)29.2(−
Int. Scaling: (2.29) Type: I Volatile: N
-10000
10000
0
rpm
23.10 SpeedStep (speed step)
SpeedStep (23.10)
is added to the speed error (∆n) at the speed controller’s input. The given min./max.
values are limited by
M1SpeedMin (20.02) and M1SpeedMax (20.02).
Internally limited from:
rpmtorpm
20000
32767
*)29.2(
20000
32767
*)29.2(−
Note:
Since this speed offset is added after the speed ramp, it must be set to zero prior to stopping the
drive.
Int. Scaling: (2.29) Type: SI Volatile: Y
-10000
10000
0
rpm
23.11 SpeedErrFilt2 (2
nd
filter for ∆n)
Speed error (
∆n) filter time 2. There are three different filters for actual speed and speed error (∆n):
−
SpeedFiltTime (50.06) is filtering the actual speed and should be used for filter times smaller than 30 ms.
−
SpeedErrFilt (23.06) and SpeedErrFilt2 (23.11) are filtering the speed error (∆n) and should be used for
filter times greater than 30 ms. It is recommended to set SpeedErrFilt (23.06) = SpeedErrFilt2 (23.11).
Int. Scaling: 1 == 1 ms Type: I Volatile: N
0
10000
0
ms
23.12 Unused
23.13 AuxSpeedRef (auxiliary speed reference)
Auxiliary speed reference input for the speed control of the drive. Can be connected to
SpeedRefUsed (2.17)
via:
−
Ref1Mux (11.02) and Ref1Sel (11.03) or
−
Ref2Mux (11.12) and Ref2Sel (11.06)
Internally limited from:
rpmtorpm
20000
32767
*)29.2(
20000
32767
*
)29.2(−
Int. Scaling: (2.29) Type: SI Volatile: Y
-10000
10000
0
rpm
23.14 Unused
23.15 DirectSpeedRef (direct speed reference)
Direct speed input is connected to
SpeedRef3 (2.02) by means of AuxCtrlWord2 (7.03) bit 10 = 1 and
replaces the speed ramp
output.
Internally limited from:
rpmtorpm
20000
32767
*)29.2(
20000
32767
*)29.2
(−
Note:
Since this speed offset is added after the speed ramp, it must be set to zero prior to stopping the drive.
Int. Scaling: (2.29) Type: SI Volatile: Y
-10000
10000
0
rpm
23.16 SpeedRefScale (speed reference scaling)
Speed reference scaling. After
SpeedRef3 (2.02) and before SpeedRef4 (2.18).
Int. Scaling: 100 == 1 % Type: I Volatile: N
-325
325
100
%
Group 24: Speed control
The Speed controller is based on a PID algorithm and is presented as follows:
( )
( )
29.2
*%100
*
1
1
1**
)()()(
n
sactsrefsref
T
TFs
TDs
TiSs
nnKpST














+
++−=
with:
−
T
ref
= torque reference
−
KpS = proportional gain [KpS (24.03)]
−
N
ref
= speed reference
−
N
act
= speed actual
− TiS = Integration time [TiS (24.09)]