SV + ASP1
DEVIATION
HIGH ALARM
DEVIATION
LOW ALARM
SV
DEVIATION
IN-BAND
ALARM
DEVIATION
OUT-BAND
ALARM
PROCESS
LOW ALARM
PROCESS
HIGH ALARM
SV - ASP1
SV + ASP1
SV - ASP1
SV - ASP1
SV
SV
SV
SV + ASP1
ASP1
ASP1
Alarm Modes:
There is one independent alarm available. The alarm modes are selected by designating the alarm types with the
parameter: . The alarm special functions ( )can be implemented together with the mode that is
selected.
• Latch Alarm: A1.SF =
When the latch mode is selected, the alarm will
stay active until the power is reset.
• Inhibited Alarm: A1.SF =
This mode prevents an alarm at start up. The alarm
is enabled only when the Process Value reaches the
Set Point (SV).
• Latch and Inhibited Alarm: A1.SF =
When selected, the alarm will stay active until the
power is reset. The alarm mode is only enabled
when the Process Value reached the Set Point Value
(SV).
• Cooling: A1.SF =
Alarm 2 can be designated as a cooling output if
heating and cooling operation is desired.
• Hysteresis (AHY1)
EXAMPLE: No special function used with (SV)
Deviation High Alarm.
SV = 100°F ASPI = 10°F AHY1 = 4°F
: Alarm ON
SV = SETPOINT VALUE
= Alarm 1 Set Point
• ALARM SPECIAL FUNCTIONS: A1.SF
SV + ASP1 = 100
°
F
112
°
F
108
°
F
= Alarm 1 Mode
• Alarm Set Point Ranges
– Low scale
High scale (Full scale Alarms)
– -199 - 199°F (-111 - 111°C) Deviation alarms
– 0-9999 minutes for (A1.SF = toon or toof) Dwell
Time
