Setting And Functional Description Of "Relay Used As A Solenoid Valve - ProMinent DULCOMETER Assembly And Operating Instructions Manual

Control parameters and functions
9.9 Setting and functional description of "Relay Used as a Solenoid
Valve"
Solenoid
valve
on
off
on
off
Fig. 33: Solenoid valve (= P-REL: dosing)
[MIN ON]
min. time
[PERIOD] (in seconds)
Cycle =
Solenoid valve switching times
The switching times of the relay (solenoid valve) depend on the cycle time, the
control variable and the 'min. time' (smallest permissible switch-on time for the
connected device). The actuating variable determines the ratio t
also the switching times.
The 'min. time' affects the switching times in two situations:
74
Cycle
t
on
Cycle
t
on
min. time
Actuating
variable: 80 %
t
on
Cycle
t
Actuating
variable: 50 %
t
on
Cycle
t
/cycle and thus
on
= 0.80
= 0.50
A0025_GB