Blog

Julie Gruenholz

Julie Gruenholz is a Senior Control Systems Engineer for Hallam-ICS. As an Electrical Engineer, she has been designing, installing, modifying and programming control systems since 1991.
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Recent Posts

Apr 09, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation

KISS and 5 Other Items to Consider when Choosing to Upgrade Your PLC Platform


Upgrading your obsolete control system is a helpful 7-part blog series addressing the important technical aspects of upgrades and written by an industry professional with over 25 years of experience.

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Mar 28, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation, Cybersecurity

6 Steps to Secure Your Industrial Control System

Digital security is a big deal these days. Your whole plant is run by computers. Computers break, software gets corrupted and voila, your whole plant is down and you’re hemorrhaging cash.

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Mar 14, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation, Cybersecurity

OT Network Design and the Need for Cybersecurity

Operational Technology (OT) networks for Industrial Control Systems (ICS) exist at every industrial facility. These sites exist for all manufacturers, both public and privately owned. These sites all want their ICS to perform with high availability, the way it was designed.

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Mar 12, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation

Replacing Your Obsolete Control System. Step 1 – Replace the SCADA

Upgrading your obsolete control system is a helpful 7-part blog series addressing the important technical aspects of upgrades and written by an industry professional with over 25 years of experience.

READ MORE

Jan 17, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation

6 Questions to Ask When Upgrading an Obsolete Control System While Keeping Your Plant Running

Upgrading your obsolete control system is a helpful 7-part blog series addressing the important technical aspects of upgrades and written by an industry professional with over 25 years of experience.

READ MORE

Jan 10, 2019 | Written by Julie Gruenholz | Process Control and Plant Automation, Cybersecurity

The 3 things I Learned When I Became a Certified SCADA Security Architect

First, some background...

Let me tell you what a Certified SCADA Security Architect is, and why I became one:

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Jul 26, 2018 | Written by Julie Gruenholz | Employee Ownership

Are You Still Working for the Man?

I work for Hallam-ICS, which is “100% ESOP”. This means that the employees own the entire company. I’m an employee, therefore I’m an owner. We’re all owners. None of us had to invest any money out-of-pocket. We just show up to work, do our jobs, and reap the benefits.

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Oct 05, 2017 | Written by Julie Gruenholz | Process Control and Plant Automation

How Do I Set Up Modbus Communication In My Modicon Unity PLC?

In my blog post, Why, In 2017, Are We Still Using Modbus? I outlined the common ways PLCs communicate with 3rd party devices using Modbus.

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Sep 14, 2017 | Written by Julie Gruenholz | Process Control and Plant Automation

Why, In 2017, Are We Still Using Modbus?

Modbus communication protocol was developed in 1979, and almost 40 years later, it is still used on many industrial sites. It is pretty cool that this openly published, free, simple protocol has been adopted by so many manufacturers to exchange information. It passes 16-bit words over a network that can be formatted however the manufacturer sees fit (unsigned, signed, real), as long as the master and the slave device have agreed ahead of time what format the word(s) will take.

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Apr 20, 2017 | Written by Julie Gruenholz | Culturally Different

Sabbatical- Is It More Like Work or Retirement?

 Short answer:

I have no idea. I've never been retired, so I can't compare. A definite answer would be like trying to tune a pH PID loop with only acid control and no base - you can make some guesses, but a concrete result is not possible.

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