Code dv4: Inversion Prevention Detection

Code type: Fault Manual section: Yaskawa A1000 Troubleshooting The Z pulse offset is not set properly to E5-11. - Set the value for Δθ to E5-11 as specified on the motor nameplate. - If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself. Replacing the PG encoder or changing the application so that the motor rotates in reverse instead requires readjustment of the Z-pulse offset. (T2-01 = 3) Electrical signal interference along the PG cable affecting the A or B pulse. - Make sure the motor is rotating in the correct direction. - Look for any problems on the load side that might be causing the motor to rotate in the opposite direction. PG encoder is disconnected, not wired properly, or the PG option card or PG itself is damaged. - Rewire the PG encoder and make sure all lines including shielded line are properly connected. - If the problem continues after cycling power, then replace either the PG option card or the PG encoder itself.