Application Note: How to enable Specialty Modules via CompactLogix? (e.g. 1746-NT8, a thermocouple module from Allen Bradley)

You can read this post on LinkedIn as well.

Introduction:

Greetings, fellow control enthusiasts! So, you've embarked on the journey of upgrading your trusty SLC-500 series controller to the mighty CompactLogix 5000 series. However, you've encountered a pesky problem: those elusive specialty modules named 1746-XXXX just won't cooperate. Fret not, for I shall shed light on this mystery and guide you to a solution that'll leave you feeling like a true control wizard!

Section 1: The Enigmatic Configuration

Ah, the allure of module configuration! In the world of CompactLogix 5000 series controller, things work a bit differently compared to the SLC-500 series' way. Those familiar right-clicks and property modifications won't yield the desired results for your 1746-XXXX modules. But fear not, dear reader, for I'll show you a workaround that shall unravel the magic!

Section 2: A Case Study

Imagine this: you find yourself in an environment with a CompactLogix 5380 controller (CPU: 5069-L306ER) accompanied by both local and remote I/Os communicating through a 1747-AENTR module over Ethernet. It's like a symphony of control, ready to be orchestrated to perfection.

Section 3: The Hidden Solution

Prepare to unveil the secret hiding in the Controller Organizer. Forget about right-clicking on modules and selecting properties—those won't do the trick for your 1746-XXXX modules. Instead, we take a detour. Double-click on the Controller Tags, where the true power lies.

A 5069-L306ER with local I/Os.

A 1747-AENTR replacing SLC-504 and turning these I/Os into remote I/Os of a 5069-L306ER

Normally, we right-click on a module in the Controller Organizer and select Properties.

Then we click the Configuration tab to modify its settings based on our need. However, doing so will change nothing on your 1746-XXXX modules. (1746-NT8 in my example).

You should double-click on the Controller Tags in the Controller Organizer.

Section 4: Tag Transformation

Behold the magic of tag selection! Seek out the tag that starts with ENETBRIDGE_1746:X(Number of a module):O (where X represents the module number and O stands for Output). Yes, my friend, this is the key that unlocks the door to configuration bliss. Modify and write your desired settings into the controller, and with each reboot, your specialty modules shall initialize like clockwork.

Section 5: The Affected Modules

This mystical solution applies not only to the 1746-NT8 module showcased in our example but also to its fellow companions: 1746-NT4, 1746-NR4, 1746-NR8, 1746-NI8, 1746-INT4, 1746-NO8I, 1746-NO8V, 1746-NI16I, and 1746-NI16V. They too shall succumb to the enchantment of proper configuration.

Conclusion:

Dear control aficionados, rejoice! Armed with this newfound knowledge, you possess the power to conquer the enigma of enabling specialty modules in your CompactLogix 5000 series controllers. Remember, should you seek further wisdom, the Rockwell Automation Knowledge Base awaits with open arms. Search for QA15801 to uncover additional treasures on this topic. Now, go forth, configure with confidence, and may your control systems thrive with newfound magic!