Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 205)

Publication 1760-UM002B-EN-P - March 2005
Wiring with Pico GFX-70 4-95
Function of the Data Function Block
Figure 4.40 Signal diagram of data function block
1: value at input >I1
2: trigger coil DB..T_
3: value on DB..QV>
PID Controller
Pico GFX-70 provides 32 PID controllers DC01 to DC32. The PID controllers
allow you to implement closed-loop control functions.
IMPORTANT
The value at input
>I1
is only transferred with a rising
trigger edge to an operand (e.g.: MD42, QA01) on output
QV>
. Output QV retains its value until it is overwritten.
ATTENTION
A knowledge of closed-loop control is required to use the
PID controllers.
The control system must be familiar so that the PID
controller can function correctly.
2
3
1