Super Systems AC20 - Manual (Page 74)

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status until the process variable reaches the alarm threshold
minus hysteresis (D).
NOTES NOTES NOTES NOTES NOTES:
1) The alarm status is present when:
the relay is energized (A1.Ac, A2.Ac or A3.Ac = dir)
the relay is deenergized (A1.Ac, A2.Ac or A3.Ac = rEV)
2) The manual reset (acknowlwdgement) may be performed by
the "ñ.rSt" [R.C01] parameter or by logic input or by serial
link.
R.F03 - R.F03 - R.F03 - R.F03 - R.F03 -Alarm 1 action Alarm 1 action Alarm 1 action Alarm 1 action Alarm 1 action
This parameter is available only when OUT 1 is configured as
alarm 1 output (“O1.Fn” [C.E01] = “ALr.1”)
Upper display: Gr.6
Lower display: A1.Ac
Range: dir
= direct action (Relay energized or SSr=1 in alarm
condition).
rEV = Reverse action (Relay energized or SSr=1 in non
alarm condition).
Example Example Example Example Example for A1.Cn (A2.Cn, A3.Cn) = H.L.
A= alarm condition detection
B= the alarm remains in alarm status (even if the measured value
is under the threshold) until a manual reset is performed (C).
E= if a manual reset is performed when the alarm condition still
exist; the LED gets steady lit, the alarm remains in the alarm
A
C
A
E
D
OFF
ON
Relay out
Alarm
Hysteresis
Alarm
Threshold
Measured
Value
Flash
Steady OFF
Flash
ON
LED 1(2, 3)
B