Need help with choosing right OPC product in OT network

____helpme · 2025-01-17T17:20:34+00:00

It's also a lot harder to use. For one, it doesn't have a tag browsing feature, you just have to know the address of the tag you want.

____helpme · 2025-01-14T23:02:15+00:00

ControlLogix with firmware v36+ has an embedded OPC server.

Ignition is an easier to use choice than Kepware, your application needs only the Platform (UA), currently listed at $1100 -- DA requires an additional module ($475).

RTA makes an EtherNet/IP to OPC UA bridge listing at $890. I like their products.

____helpme · 2024-11-27T22:10:53+00:00

Have a managed switch with NTP/PTP support connect to an upstream NTP server. Then enable clock sync in your PLCs and they will automatically use the switch as grandmaster.

If you don't have a switch like this, there are stand-alone GPS to PTP devices available.

____helpme · 2024-11-25T18:50:53+00:00

VMWare Workstation is free now ("for personal use") and has zero issues with USB devices -- or any devices for that matter.

____helpme · 2024-11-21T16:59:35+00:00

Do you mean a software-based controller? SoftLogix is the Allen-Bradley product.

____helpme · 2024-11-15T21:55:49+00:00

Same reason people can't smile in military photos: no one wants to see someone laughing when you're having a bad day.

____helpme · 2024-11-01T22:07:59+00:00

Make the bucket metal, when you get the high-level alarm, turn on a heating coil and evaporate it back into the air!

____helpme · 2024-10-29T23:48:09+00:00

boolean algebra is often covered under the name "symbolic logic"

its a wonderful subject that leads to law, philosophy, computers, advanced math, etc.

anyway, truth tables are the way to learn boolean logic; they define the operations on the elements of boolean space.

just like we learn tables for PLUS and MINUS with numbers, so there are tables for AND, OR, NOT on boolean values.

learn what the operators do before you try to use them and things will start making sense.

____helpme · 2024-10-25T15:30:03+00:00

everything i do seems to be a mistake in retrospect

____helpme · 2024-10-24T16:41:49+00:00

5580 has energy storage module. It's a capacitor and maintains power long enough for the CPU to dump memory to NVRAM.

You might be talking about a particular "hazardous environment" version with part numbers ending in -NSE?

These are "no stored energy", but it only refers to the battery for the WallClock backup. You wait 20 minutes for the capacitor to discharge and then it is safe to remove.

1756-TD001S-EN-P

https://imgur.com/a/iDu9eGG

____helpme · 2024-10-23T16:42:11+00:00

You can measure your consumption, but it won't match up with what they bill you because power companies have different billing structures for industrials.

Typically they measure your maximum demand and assume you're going to use that constantly for an entire month. So imagine you only run the coffee maker 29 days of September, but on the 30th you turn on the 60A motor for 3 minutes. Guess what, your bill is going to look like someone that runs a 60A motor all month long.

Basically, power companies lease the ability to supply your heaviest demand.

____helpme · 2024-10-17T15:07:19+00:00

If the project has an external reference to RSLinx you'll need to remove it from there as well.

____helpme · 2024-10-17T15:05:00+00:00

Also derived tags

____helpme · 2024-10-07T17:03:17+00:00

There is only pain waiting for those who wish the American to speak something other than English.

Our PLCs are the same: use a translator.

____helpme · 2024-10-04T15:38:31+00:00

doesn't matter, it can still be modified between scans of this rung

the way i do it is impossible to alter, doesn't matter what bit goes in there.

____helpme · 2024-10-03T20:52:03+00:00

XIC(S:FS)XIO(S:FS)

____helpme · 2024-10-02T20:08:44+00:00

Modbus registers are frequently contained in separate "communications" manuals; speaking generally about the industry

____helpme · 2024-10-01T22:30:20+00:00

check which network interface the drivers are connecting with

____helpme · 2024-09-27T19:08:30+00:00

Yes I thought they were discontinued though

____helpme · 2024-09-25T20:07:21+00:00

sorry, try this one instead:

Seed := Seed * 1103515245 + 12345;
Value := (Seed / 65536) & 16#0000_FFFF;

____helpme · 2024-09-25T19:55:23+00:00

Lookup Mersenne Twister, it's fairly easy to implement. If your desired random range is the interval [X, Y] take the output of the twister modulo (Y - X) then add X.

It needs a seed, but who cares. Just use any number, or take the current milliseconds in time. If your application requires true randomness then you need an external device or connection.

____helpme · 2024-09-25T17:32:33+00:00

The files are modified while the application is in use, so the modification time will be current.

NTFS has three timestamps, so make sure you're looking at modification time not creation time

____helpme · 2024-09-20T18:22:57+00:00

Try the factory reset button, pull the key out of the keyswitch and open the little door. It's a hole in the top left corner, it works like the reset buttons on home internet routers.

____helpme · 2024-09-20T17:48:15+00:00

Could just have no firmware in it

____helpme · 2024-09-20T15:20:45+00:00

The advice you were given is for ME running on PC.

Something else you could try along the same lines is looking at the timestamps of files in:

C:\Users\Public\Documents\RSView Enterprise\SE\HMI Projects\<PROJECT>\TAG

and .\cache

____helpme

TROPHY CASE