The resolver of a Danfoss PMI/PME motor can be connected to an EC-C inverter with a shielded, twisted pair cable with a minimum of 6 leads (3 twisted pairs). A fieldbus-approved cable is recommended to ensure good signal quality.
Always connect the _N and _P signals of each function (sine, cosine, excitation) as a twisted pair. The shield of the cable should be connected to the chassis ground on both ends of the cable. The pinout of the connectors in the inverter as well as the motor can be found in the datasheets of the respective devices, visit the Danfoss Editron website for up-to-date datasheets and user manuals.
If the resolver signal is not working, please check that the wiring has been connected as pictured above. The shield should be connected from both ends of the cable, but for troubleshooting purposes you can try to disconnect the shield from one end of the cable to see if the issues in the resolver signal are reduced or corrected. This is usually a sign of missing or inadequate grounding of the motor and/or inverter, please refer to the article General grounding (earthing) guidelines for information about correct grounding of the devices. Terminal strips, connection blocks or other splices and connections in the resolver cable will degrade the signal and can lead to unstable behavior and malfunctions. It is recommended to use only a solid one-piece cable directly from the inverter to the motor.
The configuration of the resolver in the inverter software is described in a separate document, see the article Resolver calibration for more information how to obtain this document.