7
7.5
V/Hz operation (diagnostics function)
7-728
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SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Table 7-8
Parameters for V/Hz operation with ARM, continued
Parameters
Name
P1134
Rated motor frequency
P1146
Maximum motor speed
P1103
Rated motor current
P1238
Current limit value
P1400
Rated motor speed
P1401
Speed for the max. useful motor speed
P1405
Monitoring speed, motor
The speed setpoint is converted into the frequency to be used as refe-
rence, taking into account the pole pair number, which is determined
from the rated motor frequency and rated motor speed.
This means the synchronous frequency, associated with the speed set-
point, is output (no slip compensation)
~430 V
P1134
P1132
P1127
U [V]
f [1/s]
Fig. 7-12 V/Hz characteristic ARM
The ramp–up time can be set via P1125.
7.5.2
V/Hz operation with synchronous motors (SRM)
For synchronous motors, V/Hz operation is only used for diagnostic
purposes.
In this case, the standard commissioning must first be executed with
motor selection, to obtain practical pre–assignment values for all of the
motor data.
V/Hz operation is then activated using P1014 = 1.
V/Hz characteristic
ARM
Ramp–up time
Commissioning
7 Fault Handling/Diagnostics
01.99