IMAGO F3000 / 10.01 71
7 Setup Program
7.5.2 Limit comparators
Limit comparators (limit monitors, limit contacts) are used to monitor the size
of an input variable (actual value for the comparator) in comparison with a
fixed threshold or another variable (set value for the comparator). If the signal
goes beyond the limit (threshold) a signal can be output or an internal function
can be initiated.
Limit comparators 1 — 8
Limit compara-
tor functions
Selection/settings Description
Function
No function Switching function of the limit comparator,
see description below
lk1 — lk8
LK actual value
LK set value
(Analog selector) Signal sources for the input variables to the limit
comparator
OFF
Action
Absolute See description below
Relative
Time
0 — 32000sec Delay time for the “Relative” action
Limit value (AL)
-199.0 to 0 to +999.9 Defines the switching point of the limit comparator
Switching
differential (Xsd)
0.0 — 1.0 — 999.9 Hysteresis
Switch-on delay
on segment change
0 — 32000sec The time delay when the segment changes
Function for
overrange /
underrange
Relay drops out The response if one of the input variables goes
above/below the given range
Relay pulls in
k / bold = factory setting
lk2
lk3
lk4
lk6
lk5
lk7
lk8
lk1 — lk6:
Monitoring relative to a set
value (setpoint) for the limit
comparator.
lk7/lk8:
Monitoring relative to a fixed
limit AL
w = set value for limit comparator,
AL = limit,
x = actual value for limit comparator,
X
Sd
= switching differential
On
On
On
On
On
On
On
On
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