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Alarm processing
10 Alarm processing
Up to four alarms can be configured. These alarms are allocated to the individual outputs. Generally, each of
the outputs OUT1, OUT2, OUT4, OUT5 (unless used by other signals) can be used for limit value or alarm
signalling.
Each of the 4 limit values LIM1 ... LIM4 has 2 trigger points LimH (Max) and LimL (Min), which can be
switched off indivudally (parameter “----”). The switching difference Lxsd of each trigger point is
adjustable.
Fig.: 46 operating principle of relative limit contact LimH / LimL
-999
x0
1
9999
x100
-999
x0
9999
x100
LimH
LimH
LimL
2
Lxsd
LimL
Lxsd
LED
Lxsd
Lxsd
LED
LED
LED
1 normally closed, 2 normally open (selection in C.500 ff; mode). LimL and LimH
correspond to values (C.600 ff; Src), at which there will be an alarm. .
Fig.: 47 operating principle of relative limit contact LimH / LimL
-999
x0
9999
x100
LimL
Lxsd
LED
-999
x0
9999
x100
LimL
LimH
Lxsd
Lxsd
LimH
Lxsd
LED
LED
LED
3 normally closed, 4 normally open (selection in C.500 ff; Mode). LimL and LimH correspond
to control deviations which cause the alarm.
a Limit values below the set-point must be specified with negative polarity sign.
The variable to be monitored can be selected separately for each alarm via configuration:
The following variables are available:
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12.07.2000
effective process value (Limit contact)
control deviation (Limit comperator)
process value x1
process value x2
Input + eventually signal pre-processing (Func1/2 r page 26 a. 63)
process value x3
auxiliary variable z
externals set-point we
external set-point offset dWe
effective set-point Weff
position feedback Yp
controller output
override control OVC
selectable set-point input WSel
pre-processed process value inputs INP1 ... INP6 (after input conditioning r page 26 a. 63)
net program time
gross program time
program rest time
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User manual KS92/94