PRIO-020

STOP.G I/O Link Communication Error

This is a communication anomaly with I/O devices handling I/O plates, etc.

Check the cable between the main ＣＰＵ board and the I/O device. Check the SLC2 installed on the main CPU board or I/O device.

Applicable equipment

Source: Fault JSON · FANUC_R30iB_全部故障码_中英双语.json · SHA-256 3eef897f540467130587726e7a53e338980cbb19f10ad88a4eddbec837fb0f55 · PRIO-020

Brand	FANUC
Updated	2026-10-26

PRIO-020

This is a communication anomaly with I/O devices handling I/O plates, etc.

Check the cable between the main ＣＰＵ board and the I/O device. Check the SLC2 installed on the main CPU board or I/O device.

Applicable equipment

Source: Fault JSON · FANUC_R30iB_全部故障码_中英双语.json · SHA-256 3eef897f540467130587726e7a53e338980cbb19f10ad88a4eddbec837fb0f55 · PRIO-020

Brand	FANUC
Updated	2026-10-26