Response Electronics CL6011B Especificaciones descargar pdf (Pagina 279)

AĆ3Appendix A: Loading and Sizing Calculations

Original Ć June 1990 CE4.2:CL6211

7. Add the figures recorded in steps 1 through 6. This sum is the total

loading value (approximate) for the controller in this application.

Compare this figure with the maximum loading value listed in Table AĆ1

for the controller. If the total loading value exceeds the maximum loading

value allowed for the controller, check your calculations for correctness.

If the calculations are correct, take one of the following actions:

H If the total loading value is only slightly higher than the maximum (5 to 10

percent), the configuration may still be acceptable. If possible, try it out

by performing configuration entry (see the system user manual) and then

loading it into a controller of the same type for which the configuration is

intended.

H Change the controller configuration to reduce the loading.

H Use a model of controller that has a greater maximum loading value.

H Place part of the configuration for the control strategy into another

controller.

A.1.2 Redundant Controller Loading

To determine the processor loading for a redundant computing or

interactive controller, perform the following steps:

1. Count the number of general registers defined in the FST Registers

form. For a redundant computing controller, multiply this number by 9

and record the result. For a redundant interactive controller, multiply this

number by 10 and record the result.

2. Count the number of indirect control points (ICPs) defined in the

Analog and Discrete ICP Point sections of configuration. For a

redundant computing controller, multiply this number by 101 and record

the result. For a redundant interactive controller, multiply this number by

130 and record the result.

3. Count the number of direct control points (DCPs) defined in the DCP

Point Definition sections of configuration. For a redundant computing

controller, multiply this number by 139 and record the result. For a

redundant interactive controller, multiply this number by 199 and record

the result.

4. Count the number of occurrences of the following FST functions

defined in the FST section of configuration: BDET, CTR, DT, FFR, FFS,

FIL, GCI, HLV, INT, LL, PDET, TM, and VLIM. Multiply the total number of

occurrences by 12 and record the result.

5. Total the loading values of each FST function defined in the FST

section of configuration (refer to Table AĆ2, beginning on page AĆ7, for

FST function loading values). Record the result.

6. Count the number of functions used in the FST, and record this

number.

1 2 ... 274 275 276 277 278 279 280 281 282 283 284 ... 319 320

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Response Electronics CL6011B Especificaciones Pagina 279

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