FANUC Programming & Software Integration 2 — Questions and Answers
Question 1: In FANUC TP programming, what does the OFFSET instruction do when applied to a position register?
- It copies the position register to a backup location
- It shifts the robot's target position by a specified offset value (Correct answer)
- It resets the position register to its home value
- It locks the position register from further modification
Correct answer: It shifts the robot's target position by a specified offset value
The OFFSET instruction shifts the programmed target position by the values stored in an offset condition register, enabling position adjustment without editing the original taught points.
Question 2: What is the purpose of the FANUC DCS (Dual Check Safety) speed check function?
- It compares TCP speed against a defined safe speed limit and triggers a stop if exceeded (Correct answer)
- It synchronizes speeds between two robots in a coordinated cell
- It logs the average speed of all robot motions over a shift
- It adjusts feed rate override automatically based on payload
Correct answer: It compares TCP speed against a defined safe speed limit and triggers a stop if exceeded
DCS Speed Check monitors the tool center point speed in real time and initiates a Category 0 or 1 stop if the TCP exceeds the configured safe speed limit.
Question 3: Which FANUC software option allows a robot program to be executed directly from a PC without first transferring the TP file to the controller?
- iRVision
- ROBOGUIDE Remote Run (Correct answer)
- FTP Background Editing
- RoboRealm Bridge
Correct answer: ROBOGUIDE Remote Run
ROBOGUIDE's Remote Run feature can stream and execute programs from a PC for simulation and testing, though production use requires the file on the controller.
Question 4: In a FANUC Karel program, what is the correct data type to declare a variable that holds a complete 6-DOF robot position in Cartesian space?
- XYZWPR
- POSITION (Correct answer)
- JOINTPOS
- VECTOR
Correct answer: POSITION
The POSITION data type in Karel stores a full Cartesian position including X, Y, Z coordinates and W, P, R orientation angles along with configuration data.
Question 5: When using FANUC's Coordinated Motion feature with a positioner, which setting defines which device acts as the master for path interpolation?
- Lead group designation in the coordinated motion setup (Correct answer)
- The group with the highest payload rating
- Whichever group has INTP enabled first
- The group with the lowest group number always leads
Correct answer: Lead group designation in the coordinated motion setup
In coordinated motion, the lead group is explicitly designated during setup and controls the path; the follower group synchronizes its motion to maintain the TCP-to-workpiece relationship.
Question 6: A FANUC program uses the instruction 'CALL PROG_A'. If PROG_A calls PROG_B, and PROG_B encounters an error, what happens by default?
- Only PROG_B is paused; PROG_A continues running
- The controller halts at the error in PROG_B and the call stack is preserved for resume (Correct answer)
- PROG_B is aborted but PROG_A restarts from line 1
- The error is silently ignored and PROG_B returns to PROG_A
Correct answer: The controller halts at the error in PROG_B and the call stack is preserved for resume
By default, a fault in a called subprogram pauses execution and preserves the call stack, allowing the operator to resume or diagnose the issue from the faulted line.
Question 7: What does the FANUC instruction 'PAYLOAD[1]' specify when placed at the start of a motion group?
- It sets the maximum allowable speed for that group to payload index 1
- It selects payload schedule number 1 to update the robot's dynamic model for inertia compensation (Correct answer)
- It locks the robot to carry exactly 1 kg regardless of actual load
- It activates the first force sensor calibration profile
Correct answer: It selects payload schedule number 1 to update the robot's dynamic model for inertia compensation
The PAYLOAD[] instruction selects a predefined payload schedule that informs the robot's servo control and inertia model, enabling accurate dynamic compensation for the attached load.
FANUC Programming & Software Integration 2
In FANUC TP programming, what does the OFFSET instruction do when applied to a position register?