15 – 1
Section 15 • Compressor Scheduling
MicroVission Controller • Operation and Service Manual • Emerson • 35391MV 1.3
Overview
This menu allows the operator to schedule control set-
point switching during the day and week, according to
application´s needs.
This feature can be enabled and disabled from the
Compressor Scheduling screen. Up to four setpoint
“switch” events can be scheduled per day, see Figure
15-1.
Scheduling Setpoint
Schedule
The options available are “Enable” & “Disable”.
For an Operator to be able to congure setpoints related
to scheduled events, the schedule must have been dis-
abled rst.
The operator can enable the Compressor Scheduling
Feature only if the established time intervals for all days
are set in an increasing order. That is, Event #1 is always
scheduled to happen before Event #2, Event #2 is always
scheduled to happen before Event 3, etc.
If the Events are not in the correct time order, the invalid
events will be marked with the caution symbol, to in-
form the operator of a conict which has to be resolved
before the feature can be enabled.
Control Mode
These drop-down boxes allow the selection of operating
modes which will get switched once the schedule event
time is achieved.
The list of available operating modes depends on the
number of controllers selected in the conguration
screen.
For example, if the number of Suction Pressure Control
Setpoints selected is “2”, and the number of Process
Control Setpoints selected is “1”, then the Control
Mode drop-down box will show the following as select-
able options:
“Unscheduled”
“Suction Pressure SP1”
“Suction Pressure SP2”
“Process Control SP1”
If the selected Control Mode is “Unscheduled”, a switch
will not take place when the set time for that Event
is achieved. Hence the Control Mode can be left as
“Unscheduled” if the operator does not want to use all
4 events per day.
Figure 15-1. Compressor Scheduling Screen
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