7
7.5 V/Hz operation (diagnostics function)
7-727
Siemens AG 2005 All Rights Reserved
SIMODRIVE 611 universal Description of Functions (FBU) – 04.05 Edition
7.5 V/Hz operation (diagnostics function)
V/Hz operation allows the following motors to be used:
Induction motors without encoder evaluation
1FK6/1FT6 feed motors without encoder evaluation
Note
The V/Hz operation is exclusively provided for diagnostics purposes for
synchronous (SRM) and induction motors (ARM).
V/Hz operation may only be used with converter switching frequencies
(P1100) of 4 or 8 kHz. After changing P1100, ”calculate controller data”
must be re–executed.
For operation with encoder, the speed actual value from the measuring
system is displayed, and for operation without encoder, a calculated
speed actual value.
7.5.1 V/Hz operation with induction motors (ARM)
For V/Hz operation, it is first necessary to carry–out the standard com-
missioning for an induction motor with motor selection to obtain practi-
cal pre–assignment values (default values) for all of the parameters.
If a motor measuring system is not used, then ”no encoder” must be
selected as the encoder type.
As ”unlisted motors” are generally used, for simple sensorless (no en-
coder) operation, the rating plate data should be entered and
the ”calculate equivalent circuit diagram data” and ”calculate
controller data” functions executed.
V/Hz operation is then activated using P1014 = 1.
For V/Hz operation with induction motors, the following parameters are
available:
Table 7-8 Parameters for V/Hz operation with ARM
Parameters
Name
P1014 Activates V/Hz operation
P1125 Ramp–up time 1 for V/Hz operation
P1127 Voltage at f = 0, V/Hz operation
P1132 Rated motor voltage
Description
Commissioning
Parameters for
V/Hz operation
with induction
motors (ARM)
7 Fault Handling/Diagnostics
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