West Control Solutions N8840 - Manual (Page 26)

3.8 Alarm handling
Max. three alarms can be configured and assigned to the individual outputs.
Generally, outputs OuT.1... OuT.6 can be used each for alarm signalling. If
more than one signal is linked to one output the signals are OR linked. Each of
the 3 limit values Lim.1 … Lim.3 has 2 trigger points H.x (Max) and L.x (Min),
which can be switched off individually (parameter = “OFF”). Switching
difference HYS.x and delay dEl.x of each limit value is adjustable.
1: normally closed ( ConF/ Out.x / O.Act=1 )
2: normally open ( ConF/ Out.x / O.Act= 0 )
Operation
Alarm handling 26 8840 profiler
H.1
LED
HYS.1
InL.1 InH.1
2 1
Ü Operating principle absolute alarm
L.1 = OFF
LED
HYS.1
H.1
InL.1 InH.1
SP
2 1
* Operating principle relative alarm
L.1 = OFF
L.1
LED
HYS.1
InL.1 InH.1
2 1
H.1 = OFF
L.1
LED
HYS.1
InL.1 InH.1
SP
2 1
H.1 = OFF
L.1
LED LED
HYS.1 HYS.1
H.1
InL.1 InH.1
SP
2 2 1
L.1
LED LED
HYS.1 HYS.1
H.1
InL.1 InH.1
2 2 1