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·
Setpoint #1/#2 Select – The operator can select
the compressor to run with setpoint #1 or #2
settings.
·
Oil Pump Selection – The operator can select
the compressor to use either oil pump #1 or #2
when compressor has a second oil pump.
·
Pressure Units – Select units of measure for pres-
sure readings. Choices are PSIG, PSIA, kPa [A],
kPa [G], kg/cm² [A], kg/cm² [G], Hg (vac) [G], WC
[A], WC [G], Bar [A], Bar [G], Torr [A], Torr [G].
·
Temperature Units – Select units of measure
for temperature. Choices are Fahrenheit or Cel-
sius, Kelvin and Rankine.
·
Anti-Recycle – The operator can select from the
following Anti-Recycle options: True, Accumula-
tive, Modified, or Hot Starts. These select the
strategy used to prevent excessive start/stop
cycles of the compressor. Timers and counters
used to enforce anti-recycling are adjusted and
monitored in the Compressor Timer Settings
screen, reached from the Menu screen. Help
for the Timer Settings screen explains how the
different settings and strategies operate.
·
Compressor Control Via – Operator can choose
the method or mode of compressor control.
This determines which measured variable is used
in making loading (capacity control) decisions.
The choice selected here determines which
setpoints are made available for adjustment on
the Compressor Control Setpoints screen.
·
Capacity & Volume Slide Non-Movement – Alarm
enable and disable buttons permit selecting
whether an alarm should be generated when
failure of slides to move is detected.
·
Reset After Power Fail – When Auto is selected,
the compressor will attempt to restart on pow-
ering up if it was running in 'Auto' when powered
down and enabling conditions are met. When
'Manual' is selected, the compressor powers up
into the 'Stop' mode and an explicit command
to run is required from an operator or comms
18
Set Up Screen
channel.
·
Min Run Capacity – When enabled, the Minimum
Run Capacity setting on the Addition Compres-
sor Setpoints screen operates as described in the
help for that screen. When multiple compressor
sequencing is used, selecting Disable here does
not interfere with use of the Min Run Capacity
setting in the sequencing logic.
·
Oil Pump Option #1 – The operator can choose
the method the compressor oil pump operates.
·
Suction Pressure Sensor Mode – The operator
can select local or remote sensor mode. Remote
sensor mode is typically used when compressors
are installed in parallel.
VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL
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