Response Electronics CL6011B Specifiche Scaricare il pdf (Pagina 277)

AĆ1Appendix A: Loading and Sizing Calculations

Original Ć June 1990 CE4.2:CL6211

A Loading and Sizing Calculations

To determine whether or not a controller is adequate for a given

application (before actually downloading the configuration to it), loading

and sizing calculations must be performed.

Processor loading is presented first, with one procedure for a simplex

(non-redundant) controller and one for a redundant controller. RAM

sizing is discussed next, and is likewise divided into two procedures.

Keep in mind that these loading and sizing calculations are only

approximations; in a close fit" situation, contact your Fisher sales office

or sales representative for recommendations.

Note:

For controllers in systems with a personal computer or

a console serving as the operator interface, the

equivalent of sizing calculations is available through

on-line diagnostic programs. After the configuration

has been downloaded to the controller, the diagnostic

program can be used to determine the actual loading

of the controller. Refer to the maintenance manual for

further information.

A.1 Loading Calculations

The following sections provide instructions for calculating controller

loading. Refer to Table AĆ1 to determine the maximum number of unit

loads for each controller type.

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Response Electronics CL6011B Specifiche Pagina 277