Here’s what more than 2,500 business decision-makers around the world say.Download the report
...with the Facility Hero app in hand! Discover how you can optimize your maintenance efforts today.Learn more
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Everything you need to know about our IoT technology backbone.Learn more
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
Goals and Symptoms
The purpose of this resolution is to inform Momentum Processor and TesysU users how to wire an LULC031 to a 172JNN21032 Option Adapter via its Port 2 RS485 (RJ45 connector) for proper communications.
Facts and Changes
In order to communicate from the JNN Option Adapter to the LULC031 (using the XMIT or XXMIT Function Blocks), two 470 ohm biasing resistors from the + and - RS485 lines must be added and connected to a 5vdc power supply (this is required by the LULC031). When communications between the JNN and LULC031 are first initiated, it will take approximately 20 seconds for the communication parameters of the LULC031 to initialize. If the communication parameters do not change and the LULC031 was power cycled, communications will immediately be established and no initialization is necessary. If the communication parameters are changed and the LULC031 is power cycled, initialization will re-occur for another 20 seconds to adjust to the new parameters.
120 ohm termination resistors must also be added at each end of the RS485 network.
Causes and Fixes
Sign up for all the latest solutions, offers and best practices straight to your inbox.
We are excited that you have joined the group. You will receive your welcome email soon describing the program and what to expect in the upcoming weeks. Enjoy!