Emerson Vilter MicroVission, Руководство по эксплуатации и обслуживанию

Страница: 74 / 116

Section 12 • Configuration Screen
12 – 2
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV
Compressor Control Section
Vilter compressors typically run in one of the three con-
trol modes: Suction Pressure Control, Process Control or
Discharge Pressure Control. Discharge Pressure Control
is mutually exclusive with Suction Pressure Control &
Process Control. When Discharge Pressure Control is se-
lected, Suction Pressure Control & Process Control are
grayed out and cannot be selected. Similarly, if Suction
Pressure Control and/or Process Control is selected,
Discharge Pressure Control is grayed out and cannot be
selected.
• Suction Pressure Control : This defines the Suction
Pressure input as the process variable and all con-
trols will be based on Suction Pressure. The operator
has the option to select up to two controllers where
each can have its own set of setpoints.
• Process Control : This defines the Process Control
input as the process variable and all controls will
be based on either Process Temperature or Process
Pressure. The operator has the option to select up to
two controllers where each can have its own set of
setpoints. The operator has to select one of the pro-
cess control modes, either temperature or pressure
as a process variable. Temperature and Pressure op-
tions are mutually exclusive.
• Discharge Pressure Control : This defines the
Discharge Pressure input as the process variable and
all controls will be based on Discharge Pressure. The
operator has the option to select up to two control-
lers where each can have its own set of setpoints.
Oil Monitoring
This section provides the options to monitor the Oil
Filter related Analog Inputs. The operator will be able
to set any of one option related to Oil Filter from below
three options:
• No Oil Filter Monitoring : When this option is se-
lected, Filter Inlet Pressure & Filter Outlet Pressure
inputs will not get monitored. Oil Filter Differential
Pressure will not get calculated. Safeties related to
“High Filter Differential Pressure” will not be active.
• Only Oil Filter In : When this option is selected, Only
Filter Inlet Pressure input will get monitored while
Filter Outlet Pressure input will not get monitored.
Oil Filter Differential Pressure will get calculated as
Filter Inlet Pressure minus Oil Manifold Pressure.
Safeties related to “High Filter Differential Pressure”
will be active and monitored.
• Oil Filter In and Oil Filter Out : When this op-
tion is selected, both Filter Inlet Pressure input &
Filter Outlet Pressure will get monitored. Oil Filter
Differential Pressure will get calculated as Filter
Inlet Pressure minus Filter Outlet Pressure. Safeties
related to “High Filter Differential Pressure” will be
active and monitoredBased on the option you select
for oil monitoring, the MicroVission Controller dis-
plays the warning and trip message for the low oil
filter pressure.
You can also select an option to trip the compressor if
the oil level drops below the required level.
Oil Level Trip
This checkbox when enabled, allows the operator to
monitor “Low Oil Level Trip”. When this option is en-
abled, MicroVission program will monitor state of “Low
Oil Level” Digital Input. The digital input will be low when
compressor oil level drops below the minimum required
level. For more information on monitoring related to
safeties, see Timers section.
Touch Screen
The “Calibrate” button puts the screen into calibration
mode. Calibration of the touchscreen is only required if
the operator finds that the pointer’s arrow is not follow-
ing the finger while trying to operate on the MicroVis-
sion screens.
In calibration mode, the operator needs to touch the
pointers as shown on the screen starting with the top-
left corner. After touching the pointer, next pointer will
be shown. The operator need to touch on all four point-
ers shown on corners of the screen in the given sequence
to complete the calibration.