401FANUC

SERVO ALARM: _-AXIS VRDY OFF (V-Ready Signal Disconnected)

414FANUC

SERVO ALARM: _-AXIS DIGITAL SERVO SYSTEM FAULT (IPM / HC / HCL)

1001FANUC

PMC ALARM: LUBRICATION PRESSURE LOW / WAY-LUBE OIL FAULT

1002FANUC

PMC ALARM: COOLANT LEVEL LOW / COOLANT PUMP OVERLOAD TRIP

2048FANUC

PMC ALARM: AIR PRESSURE LOW (MAIN PNEUMATIC SUPPLY < 5.0 BAR)

F07900SIEMENS

SINAMICS S120 FAULT: DRIVE MOTOR BLOCKED / STALLED

Z70MITSUBISHI

MITSUBISHI M70/M80: ABSOLUTE POSITION DATA LOST (AXIS ZERO LOST)

SERVO ALARM: _-AXIS VRDY OFF (V-Ready Signal Disconnected)

Servo amplifier ready signal (VRDY) dropped LOW while the CNC was expecting the drive to be energized. The main magnetic contactor (MCC) dropped or did not engage.

🛠️ Resolution Action Plan:

Step 1: Check 7-segment LED display on PSM & SVM in the electrical cabinet.
Step 2: If PSM shows '--' and SVM shows '--', check E-stop string & MCC 24V signal.
Step 3: If PSM shows error code (e.g. 01, 02, 04), refer to PSM Alarm table.
Step 4: Press RESET on CNC panel after releasing E-stop. Cycle CNC main power if needed.