Red Lion Help

Is there a complex code that can pulse 0-1-0-1 continuously when the HMI screen power ups.

DarrenMcT said:

Is there a complex code that can pulse 0-1-0-1 continuously when the HMI screen power ups.

Click to expand...

DispCount.0

This value will change from 0 to 1 to 0 over and over every time the Display updates (which is pretty fast).

If this is too fast, try DispCount.1 or DispCount.2

This is simply picking a bit from the Integer value of the number of display updates since the last reset.

Along the same lines as JHarbin's suggestion, I frequently use the expression 'TimeNow & 1' to create a pulsating lamp on the HMI (once a second).

Thanks Guys, but how do u write this back to the PLC using an 'M' contact or similar? I need the PLC to know when I have a comms failure.

Lots of ways to do it. Here's one:

Create a data tag in the Red Lion that points to the M Coil such as MyCoil.

Go to the Red Lion Programs tab and create a program named fInit
Inside the program:
// Toggle coil every tick (1 second)
MyCoil = !MyCoil;

Go to the Red Lion Display Pages, and go to the top level folder (above all pages). If you right click on it you'll see the On Tick Global Action. Call your program once a second from here: enter 'fTick()'

In your PLC program you'll need a timer that checks when this toggling bit goes away - meaning your comms have died. I would leave it fairly long timer in case there is a hiccup - say 10 seconds.

Thank [FONT=&quot]you nwboson

That worked perfectly for me. You have pulled me out of a great big hole!!!
Also, apologies for the double posting, I'm new to forums like this.
Thanks again, much appreciated.

Darren
[/FONT]