ABB CL Series Applications Manual page 111

Wiring with the logic relay
I5uA1----SQ1
hA2u---RQ1
i5---k
108
F1 +0
h The values
No values are used with a gain factor, and no offset is
used.
1
2
3
4
on
off
Figure 52: Signal diagram of analog value comparator in Greater
than mode
1: actual value at I7
2: setpoint plus hysteresis value
3: setpoint
4: setpoint minus hysteresis
The n/o contact switches if the actual value at I7 reaches the
setpoint. The n/o contact switches off when the actual value
at I7 falls below the setpoint minus hysteresis.
Example: Analog value comparator as two-step
controller
If, for example, the temperature goes below a value, A1
switches on the output Q1 with the enable input I5. If the
temperature exceeds the set value, A2 will switch off. If
there is no enable signal, output Q1 will always be switched
off by I5.
1SVC 440 795 M0100
F2 +0 OS +0
, and were not defined.