Subprogram "Blink; Figure 32: Network 1 (Plc-Prg); Figure 33: "Blink" Program - WAGO I/O System 750 Quickstart Reference

36 Application example: Starterkit880_App1_FUP.pro
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

WAGO-I/O-SYSTEM 750
750-880 ETHERNET Programmable Fieldbus
Quickstart Reference
Version 1.0.0