15
UK
2� The volumetric flow increases slowly and does not reach the set point /good
range within dST�
> Outputs are reset�
3� Volumetric flow quantity falls below LFC within dST�
> Outputs are reset at once; dST is stopped�
Example: dST for hysteresis function
Condition
Reaction
1 Volumetric flow quantity Q reaches LFC dST starts, output becomes active
2 dST elapsed, Q reached SP
output remains active
3 Q below SP but above rP
output remains active
4 Q below rP
output is reset
5 Q reaches again LFC
dST starts, output becomes active
6 dST elapsed, Q has not reached SP
output is reset
7 Q reaches SP
output becomes active