P30: Lower alarm value
P31: Upper alarm value
The exit alarm is a boundary alarm or a range alarm with one-sided hysteresis (see parameter
P32). Both at the boundary alarm and the range alarm, limit values can be relative, i.e. going along
with the setpoint S1/S1’, or absolute, i.e. independent of the setpoint S1/S1’. At boundary alarm the
hysteresis works one-sided inwardly, and at range alarm outwardly (see fig. 3-6).
P32: Hysteresis alarm circuit
Hysteresis is set one-sided at the adjusted limit value. It becomes effective depending on alarm
definition (see fig. 3-6).
Fig. 5:
Boundary alarm, alarm contact invers
A30=4 limits relative
A30=5 limits absolute
Fig. 6:
Range alarm, alarm contact invers
A30=6 limits relative
A30=7 limits absolute
Fig. 3:
Boundary alarm, alarm contact normal
A30=0 limits relative
A30=1 limits absolute
Fig. 4:
Range alarm, alarm contact normal
A30=2 limits relative
A30=3 limits absolute
Summary of Contents for ST710-KHJV.03
Page 2: ......
