208
Signal and parameter list
3ADW000379R0501 DCS550 Manual e e
Signal / Parameter name
m
in.
ma
x.
def
.
uni
t
22.07 VarSlopeRate (variable slope rate)
Variable slope is used to control the slope of the speed ramp during a speed reference change. It is active
only with VarSlopeRate (22.07)
≠
0. Variable slope rate and the drive’s internal ramp are connected in series.
Thus follows that the ramp times - AccTime1 (22.01) and DecTime1 (22.02) - have to be faster than the
complete variable slope rate time. VarSlopeRate (22.07) defines the speed ramp time t (ms) for the speed
reference change A (rpm):
t (ms) = cycle time of the overriding control (e.g. speed reference generation)
A (rpm) = speed reference change during cycle time t
Note:
In case the overriding control system’s cycle time t (ms) of the speed reference and VarSlopeRate (22.07) are
equal, the shape of SpeedRef3 (2.02) is a strait line.
Int. Scaling: 1 == 1 ms
Type: I
Volatile:
N
0
30000
0
ms
22.08 BalRampRef (balance ramp reference)
The output of the speed ramp can be forced to the value defined by BalRampRef (22.08). The function is
released by setting AuxCtrlWord (7.02) bit 3 = 1.
Internally limited from:
rpm
to
rpm
20000
32767
*
)
29
.
2
(
20000
32767
*
)
29
.
2
(
−
Int. Scaling: (2.29)
Type: SI
Volatile:
N
-10000
10000
0
rp
m
22.09 AccTime2 (acceleration time 2)
The time within the drive will accelerate from zero speed to SpeedScaleAct (2.29).
AccTime2 (22.09) can be
released with Ramp2Sel (22.11).
Int. Scaling: 100 == 1 s
Type: I
Volatile:
N
0
300
20
s
22.10 DecTime2 (deceleration time 2)
The time within the drive will decelerate from SpeedScaleAct (2.29) to zero speed.
DecTime2 (22.10) can be
released with Ramp2Sel (22.11).
Int. Scaling: 100 == 1 s
Type: I
Volatile:
N
0
300
20
s
Summary of Contents for DCS550 Series
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