User Manual

Function blocks
183
08/04 AWB2528-1423GB
Function of the data function block
Figure 83: Signal diagram of data function block
1: value on input >I1
2: trigger coil DB..T_
3: value on DB..QV>
PID controller
This function block is available from device version 04.
easy800 provides 32 PID controllers DC01 to DC32. The PID
controllers allow you to implement closed-loop control
functions.
2
3
1
h
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.
Caution!
A knowledge of closed-loop control is required in order to
use the PID controllers.
The control system must be familiar so that the PID
controller can function correctly.