: Because the built-in pulse coder is located under the red cap on the motor and requires precise alignment, it is rarely repaired in the field. The most reliable way to confirm the fault is to swap the motor
Look at bit #3 (PCA). If it is set to 1, a speed count trouble alarm has occurred, confirming the pulse coder issue. fanuc 366 alarm
: Use a multimeter to check for broken wires or shorts in the encoder cable. Swap Components : Because the built-in pulse coder is located