ECKELMANN VS 300 - Control Algorithm with Speed Control

Function of VS 300
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Doku-Version 2.05 - Firmware 2.10 - 15. September 2017
4.5.5 Control algorithm with speed control
High pressure detected by an A/D converter is compared with the setpoint (see section 4.5.10 Determining the
High-pressure Setpoint). The following relationship applies:
Controlerror 
With a positive control error, a speed setpoint is calculated by a PI control algorithm and transmitted to the
speed adjuster via analog output (0-10 V). The speed adjuster controls fan speed to the defined setpoint.
Time
ZNR. 51203
63 630 E0
VS 300 Fan setup characteristic
Regelung
Enabling
speed adjuster
Minimal
speed
Input signal[V]
Request
With a negative control error, the speed adjuster is disabled by the first capacity stage of the allocated control loop
of the VS 300 when speed drops to minimal speed and the basic and variable unload times have elapsed.
Time
ZNR. 51203
63 530 E0
VS 300 Speed adjuster cutoff
Enabling
speed adjuster
Minimal
speed
Basic + variable
load time
Input signal[V]
Control
Request
Control can be influenced by three parameters: