Function of VS 300
26
Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
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ime
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VS 300 Speed ad
j
uster cutoff
Enab
l
ing
speed ad
j
uster
Minima
l
speed
Basic + variab
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e
l
oad time
I
nput signa
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Contro
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Request
Control can be influenced by three parameters:
‐ Minimum speed of frequency changer with continuous control
‐ Adjusting differential/regulating speed of analog output
‐ Maximum temperature with speed control
These parameters are only displayed when speed or combined control is activated as the control
type (see section 8.1.8 Parameter List S3: Common Setpoints for System Configuration).
The
Minimum Speed
parameter can be used to define minimum speed for the speed adjuster. Entry is made in
percent for the 0-10 V analog output of the VS 300. Controller speed can be set by the
Analog Output Regulat
ing Speed
parameter.
The value must be increased if the controller is too slow and should be decreased if hunting occurs. One or two
relay/control stages can be allocated to one speed controller. If only one stage is allocated, it is used for en
abling/disabling of the frequency changer. When two stages are allocated to the controller, the first is used for
enabling/disabling and the second to actuate a frequency changer bypass.
The connected compressor then runs at constant speed (line frequency) bypassing the frequency changer. If
the limit entered as maximum temperature with speed control is exceeded and a second relay/control stage is
allocated to the speed controller, this second stage (bypass) will be activated and the first stage disabled (en
abling of frequency changer).
On attaining the defined t
0
setpoint, the controller returns to control mode (bypass off, enabling of frequency
changer on).
When parameters are set for a bypass stage, the stage must always be connected, since enabling of
the speed adjuster is disabled at high temperature!
Содержание VS 300
Страница 8: ...vi Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 18: ...System Design of VS 300 10 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 22: ...Application of VS 300 14 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 158: ...Parameter List and Menu Structure of VS 300 150 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 160: ...Decommissioning and disposal 152 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 166: ...Alarms and Messages of VS 300 158 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 170: ...162 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...
Страница 172: ...Order No s and accessories of VS 300 164 Doku Version 2 05 Firmware 2 10 15 September 2017 Notice ...