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B - 38

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 2.0

Appendix B • Vission 20/20 Application Procedures

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

B-4)

Figure B-24. Typical Block Diagram of a Multi-Compressor Control Scheme (1 of 4)

1 2 ... 193 194 195 196 197 198 199 200 201 202 203 ... 261 262

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