Direct I/O; Run Permissive; On Communication Failure; Ethernet - Emerson VILTER MicroVission Operation And Service Manual

Section 12 • Configuration Screen

Direct I/O

Enables the Direct I/O Inputs. When checkbox is en-
abled, the operator can select any one Direct I/O option
from "Auto Control" and "(Digital) Manual Control".
• Auto Control: This option will allow the operator to
run compressor in Direct I/O Auto Run Mode. The
algorithm will use setpoints of Compressor Control
screen for loading & unloading of compressor
cylinders.
• (Digital) Manual Control: This option will allow the
operator to run compressor in Direct I/O Manual
Run Mode. The algorithm will monitor the state of
"Remote Increase" & "Remote Decrease" Digital
Inputs for loading & unloading compressor cylinders
respectively. If "Remote Increase" Digital Input is ON
& "Remote Decrease" Digital Input is OFF then the
compressor will load one step. Similarly, if "Remote
Increase" Digital Input is OFF & "Remote Decrease"
Digital Input is ON then the compressor will unload
one step.
• Cap Hold Control: This option will allow the operator
to run compressor in Direct I/O Cap Hold Run Mode.
Combo-box options allow user to configure Auxiliary
Analog Input as Remote Setpoint for controlling load/
unload functionality.
The algorithm will monitor the Auxiliary Analog Input
configured as "Remote Capacity %" for loading & un-
loading compressor cylinders.
The Auxiliary Analog Input selected for Direct I/O Cap
Hold will be named as a "Remote Capacity %". This
Name will be updated in Configuration, Calibration,
IO States and Auxiliary Screens for corresponding
Auxiliary Analog Input. This Combo box selection is
mandatory when Direct I/O Cap Hold radio button
is enabled.
The operator should ensure following conditions are
met to run the compressor in Direct I/O Run Mode:
1. "Direct I/O" checkbox is enabled.
2. "Active Remote Control" setting is set to "Direct I/O".
3. "Remote Start/Stop" Digital Input is ON.
Once above conditions are met, the operator can
start compressor in Direct I/O Run mode by pressing
on "START" button in Main screen and then selecting
"Remote" option in pop-up window.
1 Cap Hold Control
12 – 6
NOTE

Table 12-3. Direct I/O Setup

Auxiliary Analog Input availability for reading Remote Capacity %
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV 1.3

Run Permissive

When this checkbox is enabled, MicroVission moni-
tors the "Remote Start/Stop" Digital Input. If "Remote
Start/Stop" Digital Input is energized (turned ON), the
compressor can start in the selected run mode (Auto
/ Manual / Remote). If the "Remote Start/Stop" Digital
Input is de-energized (turned OFF), the compressor will
wait until the Digital Input is energized.
When this check box is disabled, MicroVission will not
monitor the state of "Remote Start/Stop" Digital Input
during the compressor start.

On Communication Failure

This feature of the MicroVission offers the ability to de-
fine how the MicroVission will handle communication
failure.
The operator can select any one options from below two
options:
• Revert to Local Control: Once the compressor
has started running in the Remote Run Mode, the
"Communication Failure Detect Timer" as configured
in Timers screen will start. If no further communica-
tion with MicroVission takes place for the configured
time, the MicroVission will be placed in Local Auto
Mode. MicroVission will also display "Remote Comm
Timeout" Alarm Message and add time-stamped
alarm event to Event List screen.
• Stop Compressor with Trip: Once the compressor
has started running in the Remote Run Mode, the
"Communication Failure Detect Timer" as config-
ured in Timers screen will start. If no further com-
munication with MicroVission takes place for the
configured time, the compressor will be stopped due
to "Remote Comm Timeout" Trip. MicroVission will
also display "Remote Comm Timeout" Trip Message
and add time-stamped trip event to Event List screen.

Ethernet

This checkbox when selected, enables the network set-
tings for the Ethernet port. Other settings will be allowed
for selection when this option is enabled.
• IP Address: Entry box to set the IP Address.
• Subnet Mask: Entry box to set the Subnet Mask.
• Gateway: Entry box to set the Gateway Address.
Direct I/O
Auxiliary Analog Input Board Enabled