User guide

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CONFIGURATION
Limit comparators
Limit comparators (limit monitors, limit contacts) can be used to monitor an input
variable (limit comparator process value) against a fixed limit or another variable
(limit comparator setpoint). When a limit is exceeded, a signal can be output or an
internal controller function initiated.
16 limit comparators are available.
Configuration
Analog inputs
Controller
Generator
Limit comparators
Outputs
Logic functions
Math / logic
C-level
Display
Interfaces
Device data
Recording
Limit comparator functions
Limit comparator scan have different switching functions.
lk1 … lk6 Monitoring referred to the limit comparator setpoint
lk7/lk8 Monitoring referred to a fixed value AL
w limit comparator setpoint, AL = limit value
AL limit value
x limit comparator process value
X
Sd
switching differential