Thyracont VD12, Руководство по эксплуатации

Страница: 45 / 56

45
vd12-14-de-171016
Switch-Points
T[p1] < F[p2]:
The relay closes when actual pressure falls below threshold T[p1]
and opens again as soon as actual pressure exceeds threshold F[p2].
T[p1] > F[p2]:
The relay opens when actual pressure falls below threshold F[p2]
and closes again as soon as actual pressure exceeds threshold T[p1].
When controlling is active, the relays are switched according to this configura-
tion.
The state of the switching outputs is indicated by figures 1 to 4. The figures are
enlarged as soon as the corresponding relay is switched on.
If both relays are assigned to one measuring channel a three-
state-control can be achieved by appropriate adjustment of the
switch-points.