chapter "Boost Function" on page 76
and
④ Acceleration / deceleration ramp time settings
●
E0.26, acceleration time [s]
●
E0.27, deceleration time [s]
Increasing the acceleration time helps avoid over current, however will affect
the performance of the speed adaptation, for which it is highly recommended
to keep [E0.26] = 0.1 (default)...1.0.
The deceleration time has been set to 0.1 as default, this value can be in‐
creased if over voltage or over current error happens during deceleration,
recommendation value is 0.1...2.0 according to application. In principle F3.19
and F3.20 are doing similar limiting to the acceleration of the motor. First or‐
der to stop motor from overcurrent should be to lower F3.19 / F3.20 then to
make E0.26 / E0.27 higher.
Acceleration [E0.26] / deceleration time [E0.27] setting is the time
for frequency increase from 0.00 Hz to [E0.08] 'Maximum output
frequency' / the time for frequency decrease from [E0.08] to 0.00
Hz respectively.
⑤ Velocity controller parameter settings
●
C3.00, speed loop proportional gain
●
C3.01, speed loop integral time [s]
For a smooth operation of DRn software a well tuned velocity controller is re‐
quired. If the velocity loop is parameterized, a greater emphasis on the dis‐
turbance rejection over set-point tracking should be considered. The perform‐
ance of a sensor less induction motor velocity control loop is altered while the
motor is heating up. Therefore the control loop might be less disturbance re‐
jective in hot state. This can lead to pressure oscillations on low speed val‐
ues. If oscillations occur it is recommended to tune the velocity loop again
when operating temperature is reached.
Bosch Rexroth AG
DOK-SYTROX-DRN5020****-IT05-EN-P
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Frequency-Controlled Pump Drive System Sytronix DRn 5020
Commissioning of Sytronix DRn 5020 System
