Yaskawa A.C90 fault code meaning

Series: Σ-V DC Power Input, Σ-7C, Σ-7S, Σ-7W, Σ-V, Σ-XS, Σ-XT, Σ-XW, Σ-V Large-Capacity Integrated, Large-Capacity Σ-V, Large-Capacity Σ-XS

Encoder communication fault

servo drive

Meaning:

Possible causes

Source: DC Power Supply Input Σ-V Series User Manual, Setup P57; Σ-7C Servo Unit Troubleshooting Manual P50; Σ-7S MECHATROLINK-III Communication Command Type RJ-45 Connector Product Manual P389; Σ-7W MECHATROLINK-III Communication Command Type RJ-45 Connector Product Manual P341; Σ-V Series User Manual, MECHATROLINK-III Communication Command Type_Rotary Type P281; Σ-XS Servo Unit, EtherCAT Communication Command Type Product Manual P677; Σ-XT Servo Unit, EtherCAT Communication Command Type Product Manual P566; Σ-XW Servo Unit, EtherCAT Communication Command Type Product Manual P618; Integrated Large-Capacity Σ-V User Manual, MECHATROLNK-II Communication Command Type_Rotary Type P281; Large-Capacity Σ-V Series, MECHATROLINK-II Communication Command Type_Rotary Type P273; Large-Capacity Σ-XS Servo Unit (Integrated Converter Type), EtherCAT Communication Command Type Product Manual P606