The manual states 4 separate conditions where the AD2S1210 indicates LOS. One of them is: When any of the resolver input pins (SIN, SINLO, COS, or COSLO) are disconnected from the sensor. This does not appear to be true.
While testing for broken resolver wire detection (S1 - S4) with default settings, there is a 39-40 degree range for each wire where invalid data comes, but no fault is detected. By changing the LOS THRESHOLD register from '0x39' to '0x47' I am able to lower the angle to about 9 degrees, but not completely. Am I missing something?