The ROC-2015 has non-volatile flash memory. This chapter explains how to interpret the LED status indicators on the CPU faceplate:
Once you have the legitimate PDF, understanding its structure saves hours of frustration. The manual is roughly 250–300 pages, organized into logical sections. roc-2015 controller manual pdf
Downloading the is step one. Making it useful is step two. The ROC-2015 has non-volatile flash memory
Here's a comprehensive paper on the "ROC-2015 Controller Manual PDF": roc-2015 controller manual pdf
Even with the manual, you need to know how to search within your PDF reader. Here are three real-world scenarios: