IFM Electronic Efector 300 SA3010 Notice Utilisateur page 36

Start-up delay (dSt)
If the start-up delay is active (dSt > 0), the following conditions apply:
As soon as the flow has reached the value 3% of the final value (FV)
• the start-up delay starts and
• the outputs are switched according to the programming: ON with
the NO function (Hno / Fno), OFF with the NC function (Hnc/Fnc).
During the start-up delay 2 cases are possible:
• fast increase of flow, switch point / acceptable range are
reached within dSt → outputs remain active
• slow increase of flow, switch point / acceptable range are not
reached within dSt → outputs are reset
Example dSt with hysteresis function
1
Q
SP
rP
3%
dSt
1
0
1
0
flow reaches 3 % of the final value (FV) → dSt starts, the output
1
becomes active
dSt has elapsed, flow has reached SP → the output remains active
2
flow falls below SP but remains above rP → the output remains active
3
flow falls below rP → the output is reset
4
flow reaches 3 % of the final value again → dSt starts, the output
5
becomes active
dSt has elapsed, flow has not reached SP → the output is reset
6
flow reaches SP → the output becomes active
7
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2 3 4 5 6 7
dSt
t
Hno
Hnc