Fanuc Robot System Variables Pdf Jun 2026

If you are looking for specific troubleshooting help or want to understand how a particular variable affects your robot’s movement, . AI responses may include mistakes. Learn more

One of the most common reasons engineers search for FANUC system variables is to unlock the hidden Mastering menu to recover from a dead pulse coder battery. Here is how to use system variables to do it:

From the Teach Pendant:

Some variables require a controller cycle power (Cold Start) to take effect, while others require changing write-privilege states under $BRK_RESUME or system security settings. fanuc robot system variables pdf

Always perform a full image backup of your robot before altering system variables.

After modifying system variables, most changes require a power cycle to become effective. When performing a power cycle, disconnect control cabinet power, , then reconnect power. This ensures the controller correctly processes the new variable settings.

| Variable | Type | Purpose | |----------|------|---------| | $MCR.$GENOVERRIDE | INT | 0–100% overall speed | | $SCR.$RMT_MASTER | BOOL | FALSE = Local, TRUE = Remote | | $DMR_GRP[1].$MROT[1] | REAL | Master rotation count for axis 1 | | $ALARM_ST[1] | STRING[80] | Current alarm description | | $SV_OFF | BOOL | Servo on/off status (write TRUE to kill servos) | | $IO_DO[1].$STATE | BOOL | Digital output 1 state | | $UFRAME[1] | XYZWPR | User frame 1 coordinates | | $UTOOL[1] | XYZWPR | User tool 1 definition | If you are looking for specific troubleshooting help

: Controls user interface settings, including menu layouts and colors. How to Access and Manage Variables

Disables or enables speed override adjustments during jogging. $PARAM_GROUP[1].$PAYLOAD Set via Calc

The variable is either a volatile type, or the system configuration is overwriting it on boot. Solution: Look for a corresponding $.STARTUP variable or store your desired value in a non-volatile register and write a background program (BG Logic) to re-apply it at boot. Here is how to use system variables to

If you need help configuring a specific robot behavior, please let me know:

: Multiple CSDN-hosted resources offer the FANUC robot system variables English manual, including the "Fanuc机器人系统变量手册" which details complete variable lists with descriptions and usage instructions.

Read-only variables will reject modification attempts with an error message. Additionally, many system variables require a power cycle or controlled start to become effective after modification.

: Controls the global override speed of the robot (0% to 100%). This is the exact value adjusted when using the speed keys on the Teach Pendant.

The Ultimate Guide to FANUC Robot System Variables: Configuration, Backup, and Troubleshooting