Response Electronics CL6011B Especificaciones descargar pdf (Pagina 280)

AĆ4 Appendix A: Loading and Sizing Calculations

Original Ć June 1990CE4.2:CL6211

7. For a redundant computing controller, write down 246. For a

redundant interactive controller, write down 314. This figure represents

the base data concentrator communications load.

8. Total the figures recorded in Steps 1 through 7. 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 a little 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

downloading it into a controller of the same type for which the

configuration is intended.

H Change the controller configuration to reduce the loading, such as by

deleting any general registers or ICPs that are not needed.

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.2 Sizing Calculations

A.2.1 Simplex Controller Sizing

To determine the RAM sizing for a simplex computing or interactive

controller, perform the following steps:

1. Write down 150. This figure represents the typical overhead value

required for each controller.

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

form. Multiply this number by 13 and record the result.

3. Count the number of auxiliary engineering unit pairs (AEUPs) defined

in the AUX EU Definition form. Multiply this number by 15 and record the

result.

4. Count the number of ICPs defined in the Analog and Discrete ICP

Point sections of configuration. Multiply this number by 24 and record

the result.

5. Count the number of DCPs defined in the DCP Point Definition

sections of configuration. Multiply this number by 237 and record the

result.

1 2 ... 275 276 277 278 279 280 281 282 283 284 285 ... 319 320

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Response Electronics CL6011B Especificaciones Pagina 280