The "ValveControl” output signal is based on the following functions:
The lowest signal of these functions is used as the internal control signal. The minimum valve output signal is defined by the parameter VLV-02. If the internal control signal drops below the value of the minimum setting, then the valve will be closed as shown in the next figure. The valve position signal is ramped up with the increase rate VLV-03.
Fig. 6. Valve Control Output
Table 8. Parameter List
Description |
Value Range |
Default Value |
Unit |
VLV-02: minimum valve position |
0...100 |
40 |
% |
VLV-03: maximum valve position increase per minute |
0...1000 |
70 |
% |