SP3 = 100
SP1–SP3 = 50
SP1–SP3–HYS = 40
SIGNAL
OFF
LEVEL
Figure 10-5. Low Deviation for both Active Above and Active Below
SP1+SP3+HYS = 260
SP1+SP3 = 250
SP1+SP3–HYS = 240
SP3 = 100
SP1–SP3+HYS = 60
SP1–SP3 = 50
SP1–SP3–HYS = 40
SIGNAL
ON
LEVEL
Figure 10-6. Band Deviation for both Active Above and Active Below
10.5 SELECTING "AL CNF" ALARM CONFIGURATION FEATURES
These bits offer the same selections for "SP 3" and "SP 4" as "SP CNF" did
for "SP 1" and "SP 2", except for the last bit, which controls "SP 3" and
"SP 4" LATCH reset.
1. "ALC.1=0"
"ALC.1=1"
When Alarm 1 (Setpoint 3) is assigned to place a band about the Setpoint 1
level (by setting "ALF.1=3", described in Section 10.6), "ALC.1=0" makes
Alarm 1 (Setpoint 3) active ABOVE and BELOW the band (OUTSIDE the
band), with the chosen hysteresis for Alarm 1 (Setpoint 3) now inside the
band. If "ALC.1=1", Alarm 1 (Setpoint 3) is active INSIDE the band, with the
chosen hysteresis for Alarm 1 (Setpoint 3) now outside the band.
SP1–SP3+HYS = 60
ON
OFF
ACTIVE ABOVE
OFF
ON
OFF
ACTIVE ABOVE
makes Alarm 1 (Setpoint 3) active above the
Setpoint value.
makes Alarm 1 (Setpoint 3) active below the
Setpoint value.
Setpoints/Alarms
SP1–SP3 = 50
SIGNAL
ON
LEVEL
ACTIVE BELOW
ON
OFF
ON
ACTIVE BELOW
10
OFF
ON
OFF
ON
OFF
10-5