User Manual

8 Configuration
42
8.4 Limit comparators “LC”
Limit comparators (threshold monitors, limit contacts) can be used to monitor an input
variable (process value for the limit comparator) against a fixed limit or another
variable (the setpoint for the limit comparator). When a limit is exceeded, a signal can
be output or an internal controller function initiated.
4 limit comparators are available.
Limit comparator
functions (lk)
Limit comparators can have different switching functions.
The hysteresis functions “asymmetrical, left” and “asymmetrical, right” can only be set
through the setup program. The “symmetrical” hysteresis function is used as
standard.
Configuration
Analog inputs
Controller
Generator
Limit comparators
Outputs
Binary functions
Display
Timer
Interfaces
Hysteresis function
asymmetrical, left symmetrical asymmetrical, right
lk1
lk2
lk3
lk4
lk5
lk6