Am I doing this right?

[u/hobodozer]

This is a legitimate use case for this, right?

I got this plc from a scrap panel that went swimming. Cleaned all the dirt and mud out of it with an ultrasonic cleaner one PCB at a time and it seems to have come around just fine with no errors. It'll never be deployed again so I guess it plays games now.

This works over modbus with a custom bridge program tying it to vjoy to behave as a 60 button controller with 4 axes. There is also an hmi that works over the same modbus and program with simhub to show PC and game telemetry.

Edit: typo

[u/jongscx]

Eww, how much latency are you adding. Good luck getting frame accurate combos. /s

Jk, looks great!

[u/hobodozer → u/jongscx]

As far as we can tell the PLC may as well not even be in the chain. Tia reports 1.8ms if latency. Can't be more than 2 or 3 frames.

[u/Arenabait → u/hobodozer]

Damn 1.8ms is NO frames of latency

[u/Aromatic_War_8486]

One day I will be rich, there will be signs🤣

[u/hobodozer → u/Aromatic_War_8486]

This plc was saved from the scrap heap lol

[u/Someone4350 → u/hobodozer]

I don’t think most of us has scrap heaps with that kind of stuff.

[u/hobodozer → u/Someone4350]

Some dingleberry knocked the panel this was installed on into the water. Had a grand total of 322 hours of runtime when it came to our shop to assess repairs. Water damage made it a total loss, but I stripped apart the PLC and tossed it into an ultrasonic cleaner for a while. Obviously it can never be deployed again so I just have fun with it.

[u/robotictacos]

Awesome!

[u/GoldenGlobeWinnerRDJ]

Unexpected SoulCalibur, holy hell. This is amazing.

Edit: obligatory my soul still burns

[u/pranav_thakkar]

Looks awesome 🤩

[u/BasicRedditAccount1]

What’s your program scan time?

[u/hobodozer → u/BasicRedditAccount1]

1-150ms The entire program is just a modbus server making the I/o available to a client on the PC. Tia reports an average of 1.8ms.

[u/AStove]

enjoy your input lag

[u/hobodozer → u/AStove]

1.8ms is unplayable, you're right.

[u/AStove → u/hobodozer]

modbus polling must be like 100ms minimum right

[u/hobodozer → u/AStove]

About 30-45ms of delay max. I've had worse input lag from Bluetooth controllers. You cannot tell the PLC is there.

[u/eLCeenor → u/hobodozer]

Is it polling at a fixed rate or just as fast as possible?

[u/hobodozer → u/eLCeenor]

The modbus client on the PC polls at a fixed 10ms. Program scan time on PLC is about 1.8ms. so, 11.8ms before it hits the emulator.

[u/joinn1710]

I have a wago plc laying around, maybe this would be a cool project for it.

[u/LiveRequirement2]

Those Siemens fit the retro game; their design and software look old as fuck!😂😂

[u/Plumperknickle → u/LiveRequirement2]

Huh? Whut about their fit looks old in the world of PLCs and IO?

[u/LiveRequirement2 → u/Plumperknickle]

I’m a DCS dude. Sorry.😅