SEW-Eurodrive MOVIDRIVE compact MCH41A, System Manual

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System Manual – MOVIDRIVE® compact Drive Inverters
3
Explanation of the parameters
Parameters
The expert characteristic curves displayed in Figure 33 are created as follows:
Expert characteristic curve with current setpoints:
Voltage signals are required at the AI11/AI12 analog input for the expert characteristic
curve function. If a load-independent current 0 (4)...20 mA is available as setpoint,
switch S11 (changeover I-signal/V-signal) must be set to ON and the current signal rout-
ed to X11:2 AI11. The setpoints 0 (4) ...20 mA will be converted into voltage signals 0
(1) ... 5 V through the internal burden (250
Ω
) .
If you want to achieve speeds of 1000 ... 4000 1/min with 0 (4) ... 20 mA, you will have
to set 4000 1the expert characteristic curve as follows:
Set P100 Setpoint source = UNIPOL/FIX.SETPT. The direction of rotation is then spec-
ified using binary inputs.
Characteristic
curve P113
AI1 voltage offset [V]
P114
AI1 speed offset [1/min]
P110
AI1 scaling (slope)
1 0 0 1
2 4 500 1.39
3 0 1500 1
4 0 3000 –1.25
02165BEN
Figure 34: Sample expert characteristic curves with current setpoints
for 0 ... 20 mA: P110 = 2 P113 = 0 V P114 = 1000 1/min P302 (n
max
) = 4000 1/min
for 4 ... 20 mA: P110 = 2.5 P113 = 1 V P114 = 1000 1/min P302 (n
max
) = 4000 1/min
10V -10V 2V 4V 6V 8V -2V -4V -6V -8V 0V
n =
4000
ma x
5000
5500
2000
3000
1000
-2000
-1000
-n =
-4000
ma x
-5000
-5500
-3000
0
n P114
V
P113
I
Direction of
rotation = "CW"
Direction of
rotation = "CCW"
[rpm]
0 – 20 mA
4 – 20 mA
P6..
P60.
P600