SV0304
APC ALARM: PARITY ERROR
Fanuc · αi Series Servo Amplifier
What does SV0304 mean?
A parity error was detected during data transfer from the absolute-position detector, making it impossible to obtain the correct machine position. This error points to a potential defect in the absolute-position detector, its cable, or the servo interface module.
Repair Steps
Verified technical data. Last updated: March 2026
Source: Fanuc αi Series Servo Amplifier