MCP connection fault: MCP unresponsive, all status LEDs off OR all status LEDs flashing

What does MCP unresponsive mean?

The Machine Control Panel (MCP) does not respond after power-on, and all its status LEDs are either off or continuously flashing. Alarm 400003 may also appear.

• Connection cable between the MCP and the PPU is not in good condition or improperly connected
• PPU interface X30 or MCP interface X10 is damaged or subject to bad contact
• PLC program fault
• Damaged PPU or MCP

Click steps to track your progress.

1. 1

   Check whether the connection cable between the MCP and the PPU is in good condition and properly connected. Try verifying with a new cable.

2. 2

   Check whether the PPU interface X30 or the MCP interface X10 is damaged or has bad contact. Try verifying with a new cable.

3. 3

   Check the PLC programs, as a PLC program fault can also cause all the status LEDs on the MCP to flash.

4. 4

   If the fault still exists after these operations, professional replacement and maintenance of the PPU or MCP are necessary.