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5.4.4 Other Features
Any air system will exhibit pressure differences from one point to the next. Even a well-designed
multi-compressor installation will show 'minor' pressure variations between one compressor's
discharge point and another compressor's discharge. These points will also vary from the central
system (normally the air storage receiver). The ES+ sequencing system is designed to tolerate minor
variations.
Since these pressure variations are not constant (they will vary due to demand changes, compressor
load percentage changes, and number of compressors running), any scheme to compensate for the
pressure variations must be dynamic. The compressors on the network continually receive system
pressure values from every machine in the sequence rotation. The values are averaged and all
compressors, lead and lag, then compare their local pressure reading to the average and adjust
their Target by the amount of error. The effect is that all compressors are controlling to a single
pressure reading, a reading that is not one that is picked up somewhere removed from the
compressor, but an average of actual delivery pressures.
This pressure is displayed on the Sequencing Diagnostics page.
5.5 Sequencing Diagnostics
The sequencing diagnostics page can be found by going to menu, then selecting Diagnostics, then
Sequencing as shown in Figure 40
below.
Figure 40: ES+ Sequencing Diagnostics Menu Navigation
The information on the ES+ Sequencing Diagnostics page is shown in Figure 41
below. This page
is the same for all machines in the sequencing network regardless of rotation number, and gives an
overview of the each of the sequenced machines in the network and information on each, such as
Summary of Contents for Governor
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