Ladder logic displayed on HMI

ValeoBill · Oct 28, 2020

Hello, all;
Years ago, I worked with an HMI on which one could display (read only) the associated PLC's ladder logic. If memory serves it was the GOT/GX developer of Mitsubishi construction. I thought it a great idea for pinpointing problems without the delay of getting online with a laptop.
Has anyone else come across this feature on other platforms?

mk42 · Oct 28, 2020

Siemens can do it with 1500 & Comfort/Advanced HMIs with a feature called ProDiag (extra license required). It covers LAD, FBD, and Graph.

Liam Moran · Oct 28, 2020

The OMRON NSJ range had this feature. I used quite a few of them back in the day around 2005-2012.

jdbrandt · Oct 28, 2020

ValeoBill said:
Hello, all;
Years ago, I worked with an HMI on which one could display (read only) the associated PLC's ladder logic. If memory serves it was the GOT/GX developer of Mitsubishi construction. I thought it a great idea for pinpointing problems without the delay of getting online with a laptop.
Has anyone else come across this feature on other platforms?

(Fuji) Hakko.

_Dock_ · Oct 28, 2020

I have seen this on some machine tools with a fanuc Controller.

LadderLogic · Oct 29, 2020

Pro-face can do it with some Japanese PLC brands.

Or, actually, any PC-based HMI can.

harryting · Oct 29, 2020

Quite a few DCS can do that but DCS typically tightly integrate the logic part with HMI.

geniusintraining · Oct 29, 2020

_Dock_ said:
I have seen this on some machine tools with a fanuc Controller.

Same here is was a CNC machine... great idea for troubleshooting, the only thing I have ever done was a maintenance screen that had the most problematic I/Os listed and they just had a little light next to them, I did install RSLogix on the same PC that was running RSView and that was nice but it was not a read only

parky · Oct 29, 2020

The new Mitsubishi Got range have that facility, Beijers E Series was the HMI Mitsubishi adopted (re-badged)from the 90's until about 2010 and I believe these also had this.

GaryS · Oct 29, 2020

Rockwell had an Active X control that would do that for RSlogix500
i used it in a few projects it allowed you to display the ladder in real time on line so you could watch the data state change in your HMI
i even had it set up with my alarm panel the operator could push a button on the alarm screen and it would open a window to show the ladder at the alarm
it was great for trouble shooting
but it required RSLinx on the host to run
also ActiveX is no longer supported

Ladder logic displayed on HMI

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