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plc basic functions - 15.13<br />

A<br />

AVE<br />

File #F8:0<br />

Dest F8:4<br />

<strong>Control</strong> R6:1<br />

length 4<br />

position 0<br />

B<br />

STD<br />

File #F8:0<br />

Dest F8:5<br />

<strong>Control</strong> R6:2<br />

length 4<br />

position 0<br />

Addr.<br />

F8:0<br />

F8:1<br />

F8:2<br />

F8:3<br />

F8:4<br />

F8:5<br />

C<br />

before<br />

3<br />

1<br />

2<br />

4<br />

0<br />

0<br />

after A<br />

3<br />

1<br />

2<br />

4<br />

2.5<br />

0<br />

after B<br />

3<br />

1<br />

2<br />

4<br />

2.5<br />

1.29<br />

after C<br />

1<br />

2<br />

3<br />

4<br />

2.5<br />

1.29<br />

SRT<br />

File #F8:0<br />

<strong>Control</strong> R6:3<br />

length 4<br />

position 0<br />

Figure 15.12<br />

Statistical Calculations<br />

ASIDE: These function will allow a real-time calculation of SPC data for control<br />

limits, etc. The only PLC function missing is a r<strong>and</strong>om function that<br />

would allow r<strong>and</strong>om sample times.<br />

15.2.4.2 - Block Operations<br />

A basic block function is shown in Figure 15.13. This COP (copy) function will

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