FANUC FANUC CNC Controllers & Human-Machine Interface (HMI) 2

Question 1

Which alarm prefix does FANUC use for errors related to the robot servo drive system?

Accepted Answer

SRVO

Answer

SRVO alarms indicate servo drive faults such as overcurrent, encoder errors, or position deviations; SYST covers system errors, INTP covers interpreter errors, and MOTN covers motion planning errors.

Question 2

A FANUC 'SRVO-023 Stop error excess' alarm most likely indicates which condition?

Accepted Answer

The robot's position error exceeded the allowed limit during deceleration to a stop

Answer

SRVO-023 occurs when the servo system detects that actual position deviated from commanded position beyond the allowable limit during a stop, often due to excessive load or mechanical binding.

Question 3

What is the function of the FANUC system variable $SCR_GRP[1].$AXISMASK?

Accepted Answer

Defines which robot axes belong to motion group 1 using a bitmask

Answer

$SCR_GRP[1].$AXISMASK is a system variable whose bitmask value specifies which physical axes are members of motion group 1, critical for multi-robot or extended-axis configurations.

Question 4

Which FANUC backup method captures programs, system variables, I/O configuration, and mastering data in a single operation?

Accepted Answer

FILE utility 'All of the Above' backup

Answer

The FANUC FILE utility's 'All of the Above' option (or equivalent full backup) saves all categories of controller data including programs, variables, I/O setup, and calibration data in one step.

Question 5

What does a FANUC program state of 'PAUSED' indicate?

Accepted Answer

Execution stopped mid-program and can be resumed from the current line

Answer

PAUSED means program execution halted at a specific line (due to an alarm, hold, or operator action) and can be resumed from that exact point, unlike ABORTED which requires restarting from the beginning.

(FANUC) Fuji Automatic Numerical Control Robotics Certification Practice Test

(FANUC) Fuji Automatic Numerical Control Robotics Certification Practice Test

FANUC FANUC CNC Controllers & Human-Machine Interface (HMI) 2