7. Connection Procedure 3 Check the LED indicators on the Distributed Sensor Unit. LED indicators in normal status: [RUN]: Lit green (Distributed Sensor Unit) [SS]: Lit green Additional Information CJ-series Position Control Unit Operation Manual (Cat. No. W487). For details on errors in the Position Control Unit, refer to Section 13 Troubleshooting of the Additional Information For details on errors in the Digital Sensor Communication Unit and the Distributed Sensor Unit, refer to Chapter 8 Troubleshooting and Maintenance of the EtherCAT ® Digital Sensor Communication Unit Operation Manual (Cat. No. E429). 25