5 Function blocks
5.13 DC, PID controller
188
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
Example of a PID controller
Figure 130:Wiring the function block coils
The function block coils are activated by markers.
Figure 131:Wiring the contacts
The message of the function block is sent to a marker.
Parametric programming of the function block inputs/outputs
When using the function block in the circuit diagram for the first time, use
OK to automatically enter the general display of function block parameters,
as shown in the figure on the left. Enter the function block settings here.
The display contains the following elements:
Coils
Function
DC..EN
Selective activation of the function block
DC..EP
Activation the proportional function
DC..EI
Activating the integral function
DC..ED
Activating the differential function
DC..SE
Activating the manual manipulated variable, manual mode
M 51--------------------------
uÄ
DC02EN
dÄ
DC02EP
dÄ
DC02EI
vÄ
DC02ED
M 52---------------------------
Ä
DC02SE
DC02LI-------------------------S M 96
DC02 UNP +
>I1
>I2
>KP
>TN
>TV
>TC
>MV
QV>
DC02
Function block: PID controller, number 02
UNP
Operating mode: Unipolar
+
Parameter set can be called via the PARAMETERS menu
>I1
Setpoint of PID controller: -32768 - +32767
>I2
Actual value of PID controller: -32768 - +32767
>KP
Proportional Gain K
p
; 0 - 65535,
in %; Example: The value 1500 is processed in the function block as 15.
>TN
Reset Time T
n
: 0 - 65535,
in 100 ms; Example: The value 250 is processed in the function block as 25 s.
>TV
Derivate Action Time T
v
: 0 - 65535,
in 100 ms; Example: The value 20 is processed in the function block as 2 s.
>TC
Scan Time T
c
: 0 - 65535, in 100 ms
>MV
Manual manipulated variable: -4096 - +4095
QV>
Manipulated variable:
• Unipolar: 0 - 4095
• Bipolar: -4096 - +4095
