• Proportional Gain - The value of the PB
gain in the PID calculation (see the section
entitled Overview to Tuning a PID
Controller).
• Integral Gain - See the section entitled
Overview to Tuning a PID Controller.
• Derivative Gain
• High Limit - The highest value that the
output can be.
• Low Limit - The lowest value that the output
can be.
• Off Value - Future
[Control] - A key is provided to select from the
following:
• 1.03 needed - Indicates that the EPROM on
the Analog Board needs to be updated to
Revision 1.03.
• Disabled - No PID control.
• Always Active - PID control always active.
• When Running - POD Control only controls
when running.
[Action] - A key is provided to select from the
following:
• Forward - Will increase the output at values
greater than the Control Setpoint.
• Reverse - Will increase the output at values
less than the Control Setpoint.
[Actual] - The Actual value of the input signal.
[Output] - The value of the Output signal as
controlled by the PID.
[OFF Value] - Only appears if control is When
Running. A key is provided to select from the
following:
• High Limit
• Low Limit
• 0%
• 100%
• Current Value
Setting up a PID Channel
NOTE: The basic steps in setting up a device for PID
control is:
1. Setup Input channel
• First, decide which physical input channel
you will be using. As an example, if you
wanted to use Suction Pressure, look
through the wiring diagram, and locate the
Suction Pressure input channel number
(channel 9). Note: If you wish to use an
Auxiliary Analog channel, it will require
being completely setup as its own
channel before attempting the remainder
of this procedure.
• Although we are setting up the input
parameters for the PID, we need to access
the Output Setup to do this. Call up the
Analog Output Setup screen. To locate this
screen, from the Operating Status screen,
press [Menu], then [Calibration], and
answer the Warning message with [OK].
Next, press the [More…] key, then [Analog
Out Calibration].
• On this screen, you can assign the PID to
either Analog 1 or 2 (Note: Analog Outputs 1
and 2 are reserved for physical analog board
# 1, and Analog Outputs 5 and 6 are
reserved for physical analog board # 2). For
this example, Suction Pressure input
channel is 9 and is located on analog board
# 1, therefore, we are free to use either
Analog Output 1 or 2. For this example, we
will use Analog Output 1.
• Press the [Calibration Setpoints] key. The
top box will be highlighted in the column that
is labeled as Input Channel to Output. This
box corresponds to Analog Output 1, which
is the one that we wish to use. Enter a [9]
(for the channel number) into this box, and
press the [OK] key.
• The value to the immediate right of this box
(in the Input column), will display the actual
value that the device attached to channel 9
is reading. The Output column is
meaningless at this point.
2. Setup Output parameters
NOTE: This step will normally never need
setting up, as the factory default values are
preset to work for most applications. If
however, these values must be modified, use
extreme care. If not properly setup, unreliable
results could occur.
• Press the [Analog 1 Out Calibration] key.
Notice that a new screen appears. This is
where you can assign a Top End Value, a
Bottom End Value, and an Offset. The text at
the bottom of this screen helps to define
these fields. When finished entering data on
FRICK
QUANTUM™ COMPRESSOR CONTROL PANEL S90-010 O
OPERATION Page 45
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