Super Systems 20PQ - Manual (Page 91)

87
Gr. 6
Example for A1.Cn (A2.Cn, A3.Cn) = H.A.
A= alarm condition detection
B= automatic reset of alarm
C= manual reset; the LED gets steady lit, the alarm remains in
the alarm status until the process variable reaches the alarm
threshold minus hysteresis (D).
Example for A1.Cn (A2.Cn, A3.Cn) = H.A.A.c
A= alarm condition detection
B= automatic reset of alarm
C= manual reset; the LED gets steady lit, the relay output goes
OFF but the LED remains steady lit until the process variable
reaches the alarm threshold minus hysteresis (D).
Alarm
Hysteresis
Measured
Value
Alarm
Threshold
ON
OFF
Relay out
ON
LED 1(2, 3)
OFF
A B A
C
D
Flash Flash
Steady
A B A
C
D
ON
OFF
Relay out
ON
LED 1(2, 3)
OFF
Alarm
Hysteresis
Alarm
Threshold
Measured
Value
Flash Flash
Steady
XKP-1-C2.p65 10/30/01, 9:37 AM 87