5 Function blocks
5.31 ST, Set cycle time
Control Relay easy800
11/11 MN04902001Z-EN
www.eaton.com
253
5.31 ST, Set cycle time
This function block is available for easy800-SWD from device version 01 and
for easy800 standard devices from device version 04.
The Set cycle time function block is used as an additional function block for
the PID controller and the counter function blocks. It provides a fixed cycle
time for processing the circuit diagram and the function blocks. When used
with a PID controller it improves the control response. It can also be used to
suppress the sporadic lengthening of the cycle time when changing screens
in the MFD. One function block is provided.
Contacts and Coils
Example of a function block for setting the set cycle time
Figure 185:Wiring the enable coil
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:
Input
I1: The set cycle time is entered at function block input I1.
The function block input I1 can be assigned the following operands:
•
Constant.
•
Markers MD, MW, MB.
•
Analog inputs IA01 to IA04:
•
IA01: Terminal I7.
•
IA02: Terminal I8.
•
IA03: Terminal I11.
•
IA04: Terminal I12.
•
Analog output QA01.
•
Output
…
QV of a different function block.
Coils
Function
ST01EN
Selective activation of the function block
I 05--------------------------
Ä
ST01EN
ST01 +
>I1
ST01
Function block: Set cycle time, number 11
+
Parameter set can be called via the PARAMETERS menu
>I1
Set cycle time: 0 - 1000 ms
