Function blocks
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MN05013005E
213
Function of the data function block
Figure 111: Signal diagram of data function block
1: value at input >I1
2: trigger coil DB..T_
3: value on DB..QV>
PID controller
EZD provides 32 PID controllers DC01 to DC32. The PID
controllers allow you to implement closed-loop control
functions.
2
3
1
J
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.