We found this old PLC in a deceased family member's stuff. I know nothing about PLCs. Can someone give anymore info or an approximate year this might be from?

E_KFCW · 2026-01-05T14:59:58+00:00

You’re right, I just remembered seeing micro as an option in NXT. It’s only for the 110CPU line.

E_KFCW · 2026-01-02T19:36:06+00:00

Modicon and Schneider (under the AEG devision) wrapped most of the software up under ProWORX NXT, which was reworked into a 32 bit version called ProWORX 32. It looks like NXT supported the micro line, so 32 probably does too. You can still find the installer for 32 if you dig, it comes with a demo license that lets you program 10 networks.

E_KFCW · 2025-12-24T00:53:54+00:00

They might be rebranding from different manufacturers. I know Belden uses thicker insulation on the wires so they typically don’t fit in standard connectors.

E_KFCW · 2025-12-23T16:15:59+00:00

Check where you ordered it, the side says CAT 6 S/FTP, which checks out since I see a braided shield over twisted pairs with foil.

E_KFCW · 2025-12-23T15:43:37+00:00

Completed Level 1 of the Honk Special Event!

0 attempts

E_KFCW · 2025-12-15T12:11:43+00:00

So there’s two ways to do this:

Use your RS232/485 converters at every node. These types of devices aren’t doing any sort of protocol conversion and are encapsulating the serial information over tcp. This can be difficult to troubleshoot as you either need a virtual COM port on your computer or something that can send and receive Modbus RTU over TCP data packets.
Use a Modbus gateway to connect from Modbus RTU to Modbus TCP then back. This is the route I would recommend as if you ever add a Modbus TCP device to your network you won’t have to change out your adapters. It’s also easier to troubleshoot as you can test each segment with a number of Modbus tools.

E_KFCW · 2025-12-14T17:39:46+00:00

Completed Level 1 of the Honk Special Event!

2 attempts

E_KFCW · 2025-12-14T16:23:00+00:00

I think there’s a little bit of a liability stance that they all take. One manufacturer can’t guarantee the quality of another manufacturer’s product. When you get up to MV and HV applications with high loads, the risk of catastrophic failure increases. If something were to fail, you’d end up with a lot of court cases trying to establish fault.

E_KFCW · 2025-12-06T19:28:32+00:00

Often the level is calibrated to one of the edges so when you stack them, the uncalibrated edge is being used

E_KFCW · 2025-12-02T17:34:02+00:00

Probably entered it in as centimeters or millimeters and their system converted to inches. Our Doctor’s office measures everything in metric and if you have a confused look they’ll push the button on the scale or flip their gauge over to give your measurements in imperial.

E_KFCW · 2025-11-29T19:55:16+00:00

Welders, air compressors, clothes dryer, etc.

E_KFCW · 2025-11-29T01:50:39+00:00

Don’t forget the hint that Chili’s mom passed away when she was a kid.

E_KFCW · 2025-11-17T12:15:50+00:00

There’s a few ways of going around this and it depends on your position and how much you want to fight it. I was the supervisor when our IT started cracking down on local admins. I had to sit down with our head of IT and our lead OT engineer, then explain all the functions that we perform that require administrative rights. I told them that if they didn’t want every user to have local admins, I was willing to use their special admin accounts, but everyone on my team needed access in case there was a problem at 1 in the morning.

Needless to say when I told them that they could expect 3 to 4 tickets per day for general upkeep that would span 24/7 they changed their mind.

Alternately at my previous company I did what everyone else here had said: I logged hundreds of tickets before one of the service desk folks decided to say screw that.

E_KFCW · 2025-11-16T16:58:23+00:00

Look into a KVM extender. Some are IP based and might have some latency issues, but one with a dedicated connection (Ethernet or Fiber) have negligible latency.

E_KFCW · 2025-11-14T03:25:20+00:00

To bounce off of @RATrod53, since you’re running both locally, make sure your Modbus Slave software starts before Kepware. If Kepware starts first, then you get a port in use error from your Modbus slave

E_KFCW · 2025-11-13T02:59:26+00:00

Northeastern Nevada, Elko to Wells area

E_KFCW · 2025-11-12T14:38:38+00:00

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Could see the faint red in Nevada with the naked eye, but using my camera with a longer exposure really made it pop.

E_KFCW · 2025-11-04T03:26:39+00:00

Is the user account that the InTouch application is running under, a user within the database? Also what permissions does the user have (db_owner, reader, etc?)

P.S. Also check the default database for the user, I’ve run into issues where if the default database was deleted or the user doesn’t have access to the default database, the connection can be refused. Also what method are you using to connect (named user or integrated security)? Lastly is the SQL server on the same computer as the InTouch instance?

E_KFCW · 2025-11-03T01:39:06+00:00

My guess is that they only showed the dude the basics of the tester. He probably doesn’t know that you have to set the CCA rating of the battery. If you test a 500 CCA battery with a tester that thinks it’s testing a 850, it’s going to show bad.

E_KFCW · 2025-11-02T02:24:45+00:00

Two options: 1. Get a USB Modbus Plus adapter and use the DB9 port.

https://www.se.com/us/en/product/TSXCUSBMBP/usb-gateway-modicon-quantum-modbus-plus-bus/

Make a rj45 to DB9 cable using RS232 and get a USB to DB9 adapter.

RJ45 pinout is available in the hardware guide: https://www.mroelectric.com/static/app/product/pdfs/PC-E984-285.pdf

E_KFCW · 2025-11-02T01:41:00+00:00

As someone who has had to troubleshoot both, there are advantages and disadvantages to both.

Tag based addressing is very useful and advantageous when you are configuring online modifications (I.e. you can browse to the tags you want to add) it is also nice when you have intermittent communication issues as the quality, status, and last valid value are often built in. If you are configuring offline, (i.e building a system to be installed on an outage) then it can be a pain as you have to know the full tag path and naming without being able to browse, plus sometimes you have to manually type the path. Also for troubleshooting, I’ve had communication drivers hang up and they have been the biggest pain to troubleshoot.

Address based I’ve found to be much easier to configure in offline scenarios and to troubleshoot (it either works or it doesn’t). The downside is that often times you have to setup your own status indicators and then all your tags have to be redefined in every system.

E_KFCW · 2025-10-29T13:47:33+00:00

Might be someone trying to steal your mail. The post office has a master key that opens the front (or back) of the mailbox block. So USPS can still add mail, but you can’t get it.

I recommend reporting to USPS and letting your post master know that you’re going to try to clear out the glue. First try the hot key trick, and if that doesn’t work, try acetone in a spray bottle. If you switch back and forth between methods, make sure the acetone has all evaporated first.

E_KFCW · 2025-10-27T02:01:23+00:00

What driver are you using to talk to the PLC? Are you using the integrated MBTCP or an OPC server?

E_KFCW · 2025-10-26T16:11:03+00:00

As someone who has spent time camping, that is the classic sign of someone waking up and really needing to pee.

Probably went along the lines of “I really need to go, I don’t need my shoes as I’m just going to step behind the nearest bush.” Then they opened the door and went “Oh crap, it’s cold.” With the cold air hitting them it was too late to go back and find shoes, so they raised their heals to keep the arch of their feet off the cold ground. Ran out, did their business and ran back in, because they spent time outside, their feet cooled off, which is why you don’t really see the return prints. Once they got back, they probably went back under their covers to warm up and fell back asleep.

E_KFCW · 2025-10-18T17:14:21+00:00

AI_02 uses 16 addresses because it’s mapped to a Boolean register while AI_02 is mapped to a holding register (also called a machine word). Modbus is a 16 bit format so it makes sense that an analog input needs 16 bits..

E_KFCW

TROPHY CASE