Author Archives: John S Rinaldi

Hubs, Managed and Unmanaged Switches

When I was very, very young, I remember my grandmother having a party line telephone. [...]

Why Active Directory is Important to a Control Engineer

As a control engineer, you have enough technology to learn and maintain, and it’s not [...]

EtherNet/IP and the TCP/IP Software Stack

I’m sure that there’s software that is more historic; the code that landed Neil Armstrong [...]

The Future of Modbus Gateways

Everyone has their fifteen minutes of fame. I’m hardly famous but a few people know [...]

Gateways as Cybersecurity Appliances

Sometimes when you talk to customers you get the strangest information. Things that you would [...]

7 Simple Steps to Machine Security

This is another part of a series of articles on what automation engineers need to [...]

What Are the 10 Most Important Questions to Ask About Modbus?

Modbus RTU will live forever. With its simplicity, ease of use, world-wide implementation, and small [...]

What Control Engineers Need to Understand about VLANS

This is another in my series of blogs and videos for factory floor engineers. In [...]

EtherNet/IP Communications vs. Allen-Bradley PLC Communications

It’s no wonder that many control engineers confuse Allen-Bradley PLC Communications with EtherNet/IP communications. AB [...]

A Customer Rebels Against Industry 4.0

It might surprise you to know that I actually hear from many of you after [...]