36
Application example: Starterkit880_App1_FUP.pro
WAGO-I/O-SYSTEM 750
750-880 ETHERNET Programmable Fieldbus
Quickstart Reference
Version 1.0.0
You can activate the first digital output using a bistable function block "rsDO1"
applying RS logic (reset = dominant).
The "SET" input of the "rsDO1" function block is linked to a flank-detecting
function block "ftrigDO1", which detects the falling flank for "xVisuDO1".
The "RESET1" input is linked via a logical AND gate that evaluates the signal for
flank detection "ftrigDO1.Q" and the status of the first digital output "xDO1."
Figure 32: Network 1 (PLC-PRG)
This linking of flank detection, AND gate, and bistable flip-flop yields the
following function:
•
If the digital output "xDO1" has not been set, then clicking the
corresponding visualization button
[xVisuDO1]
will set the digital output
"xDO1."
•
If the digital output "xDO1" has already been set, then clicking the
visualization button
[xVisuDO1]
will result in the digital output "xDO1"
being reset.
4.4
Subprogram "Blink"
The "Blink" subprogram is located in the
Utilities
folder.
Figure 33: "Blink" program
