How do I monitor internet access & notify to a PLC via modbus

Question

0.00/5 (No votes)

See more:

Hi,
I have control systems worldwide that I monitor remotely, PLC / HMI based with a headless Intel NUC within the network.
Each system has a 4G modem which works well 99% of the time, but occasionally it drops off generally to poor reception and requires a reboot.
I have wired the power to the Modem through a normally closed contact of a relay controlled by the PLC for a future possibility of monitoring the Internet access and automatically rebooting the modem.

I was hoping to find a software package that could monitor the internet and provide its status to the PLC via TCP Modbus.
To me, this doesn't seem overly difficult, but unfortunately, I do not have the skill base to do it.

Can anyone suggest a solution?

Kind Regards
Brad

What I have tried:

The PLC can send emails, and I was considering sending an email every 30 minutes or so and monitoring the successful status bit.
I'm not overly keen on this option, hoping there is a better solution.
Thanks

Posted 12-May-22 11:16am

Brad Winters

Updated 24-Dec-22 13:57pm

Add a Solution

Comments

Peter_in_2780 12-May-22 19:10pm

Periodic email is a bit of overkill, I agree.
I monitor internet accessibility by using ping to a well-known address, like 1.1.1.1 or 8.8.8.8

Brad Winters 13-May-22 4:44am

Thanks

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

steveb · Answer 1 · 2022-05-12T19:54:00

Solution 1

Something of this kind is so easy to implement in code. Pretty much ping or access programmatically any known address, like google.com and if it is timesout or gives socket error use OS API to reboot the system. It needs to be a service so it will start every time machine restarted and does not require actively logged in user

Posted 12-May-22 19:54pm

steveb

Comments

Brad Winters 13-May-22 17:08pm

Thanks

MustafaAquil · Answer 2 · 2022-12-24T13:57:00

Solution 2

Are you looking for a Free/Paid versions of software packages?

Posted 24-Dec-22 13:57pm

MustafaAquil