Variables Pdf: Fanuc Robot System

FANUC is protective of its intellectual property, but legitimate users can access these documents. Here is the official workflow:

For the purpose of clarity, system variables can be categorized into four primary functional domains: I/O Status, Motion & Position, System Configuration, and Error Handling.

These are among the most frequently utilized variables, allowing the logic to read the state of physical and virtual I/O.

$DO[i] (Digital Output): Boolean value representing the status of Digital Output i.

$GI[i] (Group Input) & $GO[i] (Group Output): Integer values representing a bank of signals.

$AI[i] & $AO[i] (Analog Input/Output): Real number values for voltage/current control.

$UOP[i] & $SOP[i] (User Operator Panel / Standard Operator Panel): Specific variables for controlling the PLC interface, including Cycle Start, Hold, and Reset signals.

You can generate a custom reference list: fanuc robot system variables pdf

In the FANUC robotics ecosystem, the controller (e.g., R-30iB, R-30iB Mate, R-30iC) relies on a vast database of pre-defined variables known as System Variables. Unlike user-defined variables (Registers, Position Registers, etc.), system variables are intrinsic to the operating system. They allow programmers and technicians to monitor the robot's status in real-time, modify system behavior without changing core logic, and integrate external peripherals.

While often sought after in compiled PDF reference guides, these variables are dynamic entities best understood through their functional classification. This paper aims to demystify the standard variable naming conventions and provide a reference framework for implementation.

The real power of having the FANUC system variables PDF is integrating these variables into automated logic. FANUC is protective of its intellectual property, but

In TP (Teach Pendant) Language:

// Set a digital output based on a system variable
DOUT[10] = $DIN[5] ; // Mirror input 5 to output 10
// Wait for collision guard to reset
WAIT ($PARAM_GROUP[1].$COLL_GUARD = 0)

In KAREL (Advanced Programming):

PROGRAM test_vars
VAR
   status : INTEGER
BEGIN
   -- Read system variable
   GET_VAR(entry, '*SYSTEM*', '$MCR.$GENOVERRIDE', status)
   -- Write new value
   SET_VAR(entry, '*SYSTEM*', '$MCR.$GENOVERRIDE', 75, status)
END test_vars

From the Teach Pendant: