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Automating Manufacturing Systems - Process Control and ...

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plc pid - 25.25<br />

8.<br />

FS<br />

active<br />

start<br />

stop<br />

BTW<br />

Rack 0<br />

Group 0<br />

Module 0<br />

<strong>Control</strong> Block BT9:0<br />

Data N7:0<br />

Length 37<br />

Continuous No<br />

active<br />

BT9:1/EN<br />

BT9:1/EN<br />

BT9:0/EN<br />

BTR<br />

Rack 0<br />

Group 0<br />

Module 0<br />

<strong>Control</strong> Block BT9:1<br />

Data N7:37<br />

Length 20<br />

Continuous No<br />

BTW<br />

Rack 0<br />

Group 1<br />

Module 0<br />

<strong>Control</strong> Block BT9:2<br />

Data N7:57<br />

Length 13<br />

Continuous No<br />

active<br />

BT9:1/DN<br />

LIM<br />

upper 2048<br />

lower 1229<br />

test N7:41<br />

active<br />

DIV<br />

sourceA N7:41<br />

sourceB 2<br />

dest N7:57<br />

MOV<br />

source 0<br />

dest N7:57<br />

O:002/0<br />

assume:<br />

12 bit input <strong>and</strong> output<br />

2s complement values<br />

-10V to 10V range<br />

constant update<br />

no filtering<br />

scale from -4095 to 4095<br />

3<br />

3V → -----4095 = 1229<br />

10<br />

5<br />

5V → -----4095 = 2048<br />

10

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