Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual de usuario Pagina 206

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Publication 1760-UM002B-EN-P - March 2005
4-96 Wiring with Pico GFX-70
Wiring a PID Controller
You integrate a PID controller in your circuit as a contact and coil.
Figure 4.41 Pico GFX-70 circuit diagram with PID controller
Parameter Display and Parameter Set for PID Controller
IMPORTANT
Three separate manipulated variables can be output. One
manipulated variable can be output via an analog output.
Two manipulated variables can be processed via two
pulse-width modulated outputs. It is therefore useful to run
up to three closed-loop controllers per program
simultaneously. Projects can be structured by selecting the
controller number.
Example: Project with 3 devices
Program 1: Controller DC 10, 11
Program 2: Controller DC20, 21 and 22
Program 3: Controller DC30
M 51--------------------------
|
-[ DC02EN
|-[ DC02EP
|-[ DC02EI
|
-[ DC02ED
M 52----------------------------[ DC02SE
DC02LI--------------------------S M 96
DC02 UNP +
>I1
>I2
>KP
>TN
>TV
>TC
>MV
QV>
DC02 PID controller function block number 02
UNP Unipolar mode
+ Appears in the parameter display
>I1 Setpoint of PID controller
>I2 Actual value of PID controller
>KP Proportional gain K
p
>TN Reset time T
n
>TV Rate time T
v
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