Author Archives: John S Rinaldi

Wishing You Bad Luck

Dear Graduate: I wish you bad luck… I write this in June, the time of [...]

Yes, It Was a Remarkable Bit of Stupidity

I blew it. I was wrong. I made a mistake. But at least I find [...]

The IT/OT Network Divide

OT (Operational Technology) comprises the processes, equipment, and materials that produce products. That product can [...]

The Mysterious World of the S7 Data Table

RTA gateways now support access to the S7 data table. That means that we can [...]

MQTT Grows Up

Over the years, I have been critical of the MQTT protocol. I am a manufacturing [...]

Renewed Effort to Promote CC-Link

I write this in early April of 2020, and right now there isn’t any baseball. [...]

The Nitty Gritty of Address Classes

It’s very difficult for us to imagine, but just two hundred years ago it was [...]

It’s Time To Love ASCII Again!

There’s a bunch of things that I love that I don’t talk about: The Roy [...]

Modbus and EtherNet/IP

I have an uncle that doesn’t just like to drink, he loves to drink. Most [...]

Switches and EtherNet/IP Networks

There is precious little information available for manufacturers to use when designing EtherNet/IP networks. To [...]