Code SP0141: Serial sensor one-rotation signal not detected

Amplifier LED display: E1 Also shown as: SP0141 (15i), SP9141 (30i/31i/32i), SP9141 (0i-D) Cause: The one-rotation signal of the sensor (serial) was not generated within five rotations after power-on. When this alarm is issued at the start, possible causes are all of (a) to (c) below. When the machine has been operating normally, possible causes are (b) and (c). Troubleshooting when this alarm is issued (a) There is a parameter setting error. When an invalid number of teeth of the sensor is set, this alarm may be issued because the actual number of rotations does not match the number of rotations calculated by the Spindle Amplifier. Refer to the section, "Parameters Related to Start-up," in the FANUC AC SPINDLE MOTOR αi series Parameter Manual (B-65280EN) to check the settings of the sensor setting parameters. (b) Sensor adjustment is defective. Refer to the section, "Detectors," in the FANUC SERVO AMPLIFIER αi series Descriptions (B-65282EN) to adjust the sensor signal. (c) The detection circuit is abnormal. Replace the detection circuit.