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Appendix C
•
Remote Control and Monitoring of Vission 20/20 Panel
Vission 20/20 • Operation and Service Manual • Emerson • 35391SC 2.7
REMOTE COMPRESSOR CONTROL VIA
COMMUNICATIONS
A compressor control scheme that is accomplished via
communications must follow some general rules. The
Vission 20/20 panel does not have a separate processor
to handle communications from a computer or PLC. All
tasks that the panel needs to accomplish are done by a
single processor. So when a device communicates to the
panel, the polling rate to the 20/20 panel can’t be unlim-
ited, it needs to be governed.
A typical compressor control scheme might look like
this:
(For communication register information, refer Table
D-1)
Figure C-13. Typical Block Diagram of a Multi-Compressor Control Scheme (1 of 4)
Summary of Contents for Vilter Vission 20/20
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