©2025 Copeland LP.
026-1803 R13 Supervisor I&O User Guide 9 - 12
9.9.1 Control Strategy
The application combines multiple analog inputs into a single
output, using either the primary combination method or the
alternate combination mode, depending on the state of the
Use Alternate Combination property.
The primary and alternate combination methods may be
configured to be one of the following:
• Average - of all defined inputs
• Minimum value
• Maximum value
• First - first input value that is not NONE
• Mix of first two inputs (using mix ratio property)
• Span - difference between the highest and lowest input
values (multiple inputs)
• Select - single value chosen by the input select (if input
select is 5, use in5)
• Sum - sum all inputs
• (in1 + in2) + in3
• (in1 - in2) - in3
• (in1 * in2) * in3
• (in1 + in2) / in3
• (in1 * in2) + in3
• (in1 - in2) * in3F
• |in1 - in2| / in3
• |in1 - in2| * in3
• sqr(|in1 - in2|) * in3
The combined values can be filtered. The filter’s primary
function is to slow the rate of change of the combined input.
The difference between the current input value and the
input's value x seconds ago, where x = Factor Time, is
multiplied by the filter ratio to produce the filter output.
The filtered output is run through a CutIn / CutOut calg that
trips a digital output (Command Out) based on the CutIn /
CutOut setpoints.
There is also a counter on the Command Out that provides a
running count that increase every time the Command Out
cycles to ON and a digital Counter Trip Output that is ON
when the Counter value is greater than the Counter's trip
point. The user enters the initial value and the count increases
by the Count Inc value. The Count output value is reset by
sending a signal to the Reset Count input. The Count Reset
Type parameter specifies whether the Count is reset based
on the logic level, the rising edge or the falling edge. The
counter increase based on the digital output after the bypass
block.
The PRI DEMAND SHED and SEC DEMAND SHED inputs
provide a way to have the cell shut down in demand shed
situations. If the PRI DEMAND SHED is ON, the Cut In/Cut Out
setpoints is bumped by the amount set in the Pri Demand
Bump parameter. Likewise, for the SEC DEMAND SHED
except the primary demand shed has priority if they are both
ON. The Stpt Bump Rst Int indicates the amount of time over
which the setpoint is ramped back to normal.
9.9.2 Control Alarming
There is a high and low limit alarm and notice 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 either the notice or alarm setpoints, a
notice or alarm is generated. If the Alarm Disable or Notice
Disable input is high, the Alarm or Notice output, respectively,
is forced to OFF. There are Notice and Alarm digital outputs
that the user can connect to. In addition, the alarm and notice
is automatically sent to AdvisoryServices.
9.9.3 Alarm Output When On/Off
Parameters
Alarm When On redefines the definition of “active” as it refers
to the state of the Alarm output. When the Sensor Control
application calls for the Alarm output to be ON the Alarm
output will change to the state specified in the Alarm When
On field. Select either ON, OFF, or NotAct in this field. Alarm
When Off redefines the definition of “inactive” as it refers to
the state of the Alarm output. When the Sensor Control
application calls for the Alarm output to be OFF, the Alarm
output will change to the state specified in the Alarm When
Off field. Select either OFF, ON, or NotAct in this field.
9.9.4 Control Bypass
The digital output may be bypassed with a timed bypass. The
output may be bypassed to ON, OFF or NONE. Once the
STRT TIMED BYP goes high, the bypass remains in effect
until the Bypass Time has expired. The CNCL TIMED BYP will
cancel any bypass and operation will return to normal. If
STRT TIMED BYP is still on, it must go low for one update
before it will activate another bypass.
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