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Rexroth Frequency Converter EFC x610
Series
12.5.4 Encoder Settings
This function is used to set filter time and encoder commutation offset in vector
control mode.
Code
Name
C3.21 Speed filter time
Encoder commutation
C3.22
offset
C3.21 is used for both sensorless vector control and vector control with encod-
er. With a longer speed filter time, which suppress the impact of the spikes, the
motor can be more stable, but this could make the dynamic performance worse.
With a shorter filter time, the system has a faster dynamic performance, but less
stable because of the possible spikes.
Because the 0 position of the encoder may not match the 0 position of the mo-
tor perfectly, encoder commutation offset C3.22 should be considered. The off-
set can be automatically calculated during the rotational auto-tuning.
12.5.5 Speed Monitor
The speed monitor will monitor the speed difference between setting point and
actual frequency as well as of maximum frequency and actual frequency. In case
of problems it will show error SPE-.
Code
Name
C3.25 Speed monitor timeout 0.0...6,553.5
Speed monitor maxi-
C3.26
mum speed difference
12.5.6 Fieldweakening control for PMSM
Code
Name
Maximum FW current
C3.30
factor for SM
This parameter is the maximum allowed percent of motor rated current C1.07, it
is used when PMSM runs in field weakening area, or called constant power re-
gion.
Setting range
0...100.0 ms
0.0...360.0°
Setting range
0.00...655.35
Setting range
1...95
R912005854_Edition 09 Bosch Rexroth AG
Functions and Parameters
Default
Unit
Step
2.0
ms
0.1
360.0
°
0.1
Default
Unit
Step
5.0
s
0.1
10.00
Hz
0.01
Default
Unit
Step
75
%
185/653
Attri.
Stop
Run
Attri.
Stop
Stop
Attri.
1
Stop
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