©2025 Copeland LP.
026-1803 R13 Supervisor I&O User Guide A - 4
Control
Temp Low
Alarm
Application
Alarm
AHU
A control temperature advisory should occur after a user
specified time delay for both high and low temperature
conditions. This advisory should have associated parameters to
allow the user to specify the high and low advisory value and
the delay. This advisory should have separate setpoints for
occupied and unoccupied mode.
Fan Proof
Fail
Application
Alarm
AHU
When enabled (Fan Prf Fail En) and a fan proof failure is
detected, heating and cooling loads will be shut down until the
proof failure goes away or the fan proof alarm is reset or cleared.
If the fan is configured to shut down on a fan proof failure, the
system may be restarted by setting the
FAN FAIL RST input to
ON or clearing the fan proof failure from the advisory log.
Control
Value Limit
Exceeded
Application
Alarm
AnalogSensorControl
There is a high and low limit alarm for the inputs after they are
combined and filtered. The user sets occupied and
unoccupied, high and low setpoints. If the combined/filtered
value exceeds the alarm setpoints an alarm is generated based
on the Alarm Type setting.
Demand
Limit
Exceeded
Application
Alarm
DemandControl
The application will provide an application alarm to signal a
high demand. The demand alarm limit and alarm delay should
be configurable.
Command
Value Trip
Application
Alarm
DigitalSensorControl
The command value will be used to determine the alarm state.
The command value is the combined value of all the digital
inputs of the cell, plus occupancy, and schedules. When the
command value changes to an alarm condition, the delay timer
will start. If the state changes, the timer will stop and no alarm
will be issued. If the state stays for the duration of the timer, an
advisory will be issued. If a state change occurs to the opposite
state after the advisory has been issued, it will be returned to
normal.
Proof Failure
Application
Alarm
DigitalSensorControl
A proof checking device is registering a failure in one of the
Application’s control devices.
Proof Fail
Application
Alarm
Lighting
Proof delay. When the Lighting Control application detects a
proof failure, it will wait for the Proof Delay time period to pass
before turning on the Proof Status output. If during this delay
the proof input returns to normal, the delay is canceled and the
Proof Status output remains OK.
LLev Proof
Fail
Application
Alarm
Lighting
Light level proofing alarm delay. The Light Level Proof Delay is
the amount of time after sunrise or sunset that, if the light level
sensor does not cut ON or OFF appropriate to the light level of a
sunrise or sunset, will generate an alarm. In other words, if the
Light Level Proof Delay is set for 1 hour, the light level must fall
below the cut-off setpoint at least one hour after sundown, or
else an alarm will be generated. Likewise, if the cut-on light level
setpoint is not reached by at least one hour after sunrise, an
alarm will be generated.
Curtail On
System
Alarm
GlobalData
A Curtailment device set up in Global Data has activated to
begin curtail.
Alarm Items Category Cell Name Description
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