6
6.1 Operating mode, speed/torque setpoint (P0700 = 1)
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
The motor current is limited to a maximum value.
The maximum value is obtained from the minimum between the para-
meterization according to Table 6-9 and the limiting as a result of the
power module.
Table 6-9 Parameters for the current limiting
Parameters
No. Description Min. Stan-
dard
Max. Units Effec-
tive
1238 Current limit (ARM) 0.0 150.0 400.0 % Imme-
diately
... specifies the maximum permissible motor current referred to the rated motor current (P1103).
In order to shorten the ramp–up (accelerating) times, it may make sense to set the current limit
to values > 100 %, and additionally increase the power and torque limit.
If the motor current is at its limit due to high torque/power limits, the monitoring function inter-
venes with P1605 and P1606 (speed controller at its limit).
1105 Reducing the maximum motor current (SRM, SLM) 0 100 100 % Imme-
diately
... specifies the maximum permissible motor current referred to the maximum motor current
(P1104).
The parameter is pre–set at the first start–up and for ”Calculate unlisted motor”:
SRM: P1105 = (P1122/P1104) 100 %
Current limiting
6 Description of the Functions
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