If you are developing advanced logic, you can read and write system variables directly within a KAREL program using built-in routines.
FANUC robot system variables can be categorized into several types:
: Note that certain critical variables require a Cold Start (turning the controller main breaker off and on) to commit changes to the non-volatile CMOS memory. 5. Best Practices for Managing System Variables
Modifying critical variables incorrectly can cause unexpected robot motion or controller lockouts. Key FANUC System Variables Categories
These are typically provided with the robot upon purchase.
This guide provides detailed information on:
To generate a clean text reference file directly from your controller:
Determines which hardware port handles High-Speed Skip signals. $FAST_CLOCK
: Contains sub-variables that dictate how the robot recovers from paused states or emergency stops. 4. Communication and I/O Handling
Mastering variables store the physical relationship between the robot’s mechanical alignment and its electronic encoder counts.
Technical documentation such as the FANUC R-J3iB System Variables Guide or the RJ3iB System Variables List on Scribd are common resources for finding detailed listings. FANUC Robot System Variables Overview | PDF - Scribd
System variables are often organized into structures that manage specific hardware or software functions: Motion and Jogging
To help you navigate the vast list, here are some of the most important variable categories you'll encounter. For detailed descriptions, always refer to the official PDF for your controller.
), coordinate systems (Tool, User, and Jog frames), and override configurations ( $OVRD_SETUP ) fall into this category. Access and Security Accessing these variables is typically done through the Teach Pendant by navigating to [MENU] > [NEXT] > [SYSTEM] > [Variables] . However, not all variables are editable: Read-Only (RO):
Scroll through the alphabetical list using the arrow keys or use the function to locate a specific variable.
A common repository for finding digitized versions of the variable lists.
Which PDF would you like: single-page quick reference or detailed model-specific manual?