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7 Fault Handling/Diagnostics
7.5
V/Hz operation (diagnostics function)
V/Hz characteristic
ARM
Ramp–up time
7.5.2
V/Hz operation with synchronous motors (SRM)
Commissioning
7-728
Table 7-8
Parameters for V/Hz operation with ARM, continued
Parameters
P1134
P1146
P1103
P1238
P1400
P1401
P1405
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)
U [V]
~430 V
P1132
P1127
Fig. 7-12 V/Hz characteristic ARM
The ramp–up time can be set via P1125.
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.
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
Name
Rated motor frequency
Maximum motor speed
Rated motor current
Current limit value
Rated motor speed
Speed for the max. useful motor speed
Monitoring speed, motor
P1134
E Siemens AG 2005 All Rights Reserved
01.99
f [1/s]
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