Rockwell-automation T8019 Trusted Process Control Algorithm Software P User Manual download pdf (Page 4)

Trusted

Process Control Algorithms T8019

Issue 8 Sep 07 PD-T8019 4

Table of Contents

1. Description...................................................................................................................................7

1.1. Functions .....................................................................................................................................8

1.1.1. Square Root Extraction................................................................................................................8

1.2. BCD Translation...........................................................................................................................9

1.3. Analogue Select.........................................................................................................................10

1.4. Multiple Value Averaging ...........................................................................................................10

1.5. Drum Level Control....................................................................................................................11

1.6. Mass Flow Computation ............................................................................................................11

2. Function Blocks .........................................................................................................................12

2.1. Analogue Scaling .......................................................................................................................12

2.2. Analogue Value Clamping .........................................................................................................13

2.3. Low Value Select .......................................................................................................................13

2.4. High Value Select ......................................................................................................................14

2.5. Median Value Select ..................................................................................................................14

2.6. Proportional PID Function..........................................................................................................15

2.7. Incremental PID Function ..........................................................................................................17

2.8. Deviation Alarm..........................................................................................................................19

2.9. Manual Tracking ........................................................................................................................19

2.10. Time Averaged Value ................................................................................................................20

2.11. Rate of Change Detection..........................................................................................................22

2.12. Analogue Value Slew.................................................................................................................24

3. Other Functions .........................................................................................................................25

3.1. Lead/Lag Control .......................................................................................................................25

4. Sample Application Program .....................................................................................................26

Figures

Figure 1 PID Function.............................................................................................................................16

Figure 2 IPID Function............................................................................................................................18

Figure 3 Sample Application Program ....................................................................................................26

Tabl es

Table 1 Error Statistics .............................................................................................................................7

Table 2 BCD Translation ..........................................................................................................................9

Table 3 Example Time Average .............................................................................................................21

1 2 3 4 5 6 7 8 9 ... 27 28

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Rockwell-automation T8019 Trusted Process Control Algorithm Software P User Manual Page 4

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