Technical information
562620-000, Issue1.0, March 2014  
20 of 25 
14.3 On Screen ALO Component Error Messages 
ALO CRC failure  EEprom config CRC failure 
ALO CAN failure  Null Safety Controller pointer 
ALO pilot failure  Failed to initialise CAN 
ALO invalid S/C  Failed to initiate back drive controller class 
ALO backdrive failure  Failed to initiate pilot/brake controller class 
ALO slew CANopen failure  No slew CAN messages 
ALO pitch/roll not detected  No dual axis CAN messages 
ALO backdrive CANopen failure  No back drive controller CAN messages 
ALO pilot CANopen failure  No pilot controller CAN messages 
ALO left feedback error  Left controller feedback error > 10% 
ALO right feedback failure  Right controller feedback error > 10% 
ALO pilot feedback failure  Pilot controller feedback error > 10% 
ALO brake feedback failure  Both joysticks active at once 
ALO illegal joysticks  Left joystick input stuck low 
ALO left joystick inactive error  Right joystick input stuck low 
ALO right joystick inactive error  Left joystick input stuck high 
ALO left joystick active error  Right joystick input stuck high 
ALO right joystick active error  Left pressure switch input stuck low 
ALO left pressure inactive error  Right pressure switch input stuck low 
ALO right pressure inactive error  Left pressure switch input stuck high 
ALO left pressure active error  Right pressure switch input stuck high 
ALO right pressure active error  Failed to initialise axiomatic controller(s) 
ALO controller failure  No/missing CAN messages from Safety Controller 
ALO S/C not reporting  Brake controller feedback error > 10% 
ALO slew DR  Slew dual redundant error 










