Sometimes the display only shows: EX1051 ... No PLC message configured. In this case, you need to read the PMC diagnostic bits.
No system is perfect, and the Mori Seiki EX list has its quirks:
Alarm: 6005 / COOLANT PUMP ERROR
The Mori Seiki EX alarm system is generally split into two distinct categories, which is the first hurdle for new operators to overcome.
The Good: The separation is logical. You know instantly if the issue is a typo in your G-code (Controller) or a physical sensor failure (Machine).
The Bad: It can be annoying to navigate. You often have to switch between the standard Fanuc alarm history and the specific "Maintenance" page on the Mori Seiki side to find the root cause of a stoppage. mori seiki ex alarm list
Based on decades of field service reports, the following EX alarms represent over 80% of service calls. This curated list is a practical starting point before you open the full service manual.
On the EX series, alarms are generally categorized by their prefix:
Mori Seiki Ex Alarm List: Understanding and Troubleshooting
Mori Seiki, a leading manufacturer of CNC machines, provides an extensive range of alarm codes to help users diagnose and troubleshoot issues with their equipment. The Mori Seiki Ex alarm list is a comprehensive guide to understanding and resolving alarms that may occur on their machines.
What is the Mori Seiki Ex Alarm List?
The Mori Seiki Ex alarm list is a detailed catalog of alarm codes, descriptions, and troubleshooting procedures for Mori Seiki CNC machines. The list includes alarms for various machine models, including lathes, milling machines, and machining centers.
Common Mori Seiki Ex Alarms
Some common Mori Seiki Ex alarms include:
Troubleshooting Mori Seiki Ex Alarms
When an alarm occurs on a Mori Seiki machine, refer to the Ex alarm list to diagnose and troubleshoot the issue. Here are some general steps to follow: Sometimes the display only shows: EX1051
Conclusion
The Mori Seiki Ex alarm list is a valuable resource for users to diagnose and troubleshoot issues with their CNC machines. By understanding the alarm codes and following the recommended troubleshooting procedures, users can quickly resolve issues and minimize downtime. Regular maintenance and checks can also help prevent alarms from occurring in the first place.
To appreciate the EX Alarm List, one must first distinguish it from standard system alarms. A system alarm, often displayed as a numeric code (e.g., 1020, 2001), originates directly from the CNC controller (typically a Fanuc, Mitsubishi, or Siemens unit) and indicates a problem with the core control logic—such as an overloaded servo, a broken encoder, or a loss of reference position. These alarms are generic across many machine brands using the same controller.
EX Alarms, however, are unique to the machine builder. The "EX" stands for External or, more accurately, Machine Builder-Specific Alarm. These alarms are programmed by Mori Seiki’s engineers within the ladder logic (PLC) of the machine. They monitor the peripheral systems—coolant pumps, chip conveyors, hydraulic units, door interlocks, tool changers, and lubrication systems. When an operator sees an alarm like “EX1040 SPINDLE UNIT LUBRICATION LOW,” this is not a generic controller alarm but a custom message created by Mori Seiki to pinpoint a condition specific to their machine’s design.