Emerson Vilter Vission 20/20, Operation And Service Manual

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10 – 1
Section 10 • Compressor Sequencing
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
Overview
The compressor sequencing screen is where more than
one Vission 20/20 panel can be sequenced in network
using Modbus TCP. These settings define how the mas -
ter compressor should control sequenced Vission 20/20
panels. This feature is enabled from the Configuration
Screen, see Section 19 for Compressor Sequencing.
When Compressor Sequencing is running, a status icon
will appear on the bottom left corner of the main screen
to make the user aware of it.
Compressor Sequencing Table
The compressor sequencing table’s menu allows the op-
erator to view and adjust settings that are used for com-
pressor sequencing, see Figure 10-1.
Device Name:
• This is a read-only value. The device Name can be
changed from the Configuration Screen, as long as
an actual name is chosen, it can’t be empty.
Min Trigger:
•
Defines the Master’s capacity value in percentage
which is used as a trigger to step wise decrease the
slave’s compressor capacity. Slave compressor ca-
pacity is decreased only if the Master is running with
capacity lower than set Min Trigger value.
Max Trigger:
•
Defines the Master’s capacity value in percentage
which is used as a trigger to step wise increase the
slave’s compressor capacity. Slave compressor ca-
pacity is increased only if the Master is running with
capacity higher than set Max Trigger value.
Equipment:
• Options of this combo box are updated depending
on devices shown in Devices List Page. This contains
names of all the compressors in the network commu-
nicating with the Master compressor. The equipment
Figure 10-1. Compressor Sequencing Screen - Page 1