Error, fault and alarm codes of products - what each code means, its causes and what to do - read from the manufacturers’ manuals, with the manual page each answer comes from.
The system failed to find a unit at the specified address. The manual's first action is: “Check the unit address at the remote node.”
The remote node is not connected to the network and communication failed. The manual's first action is: “Check the connection to the remote node.”
The system has failed to send a command due to resend count exceeding limits. The manual's first action is: “Check transceiver at remote node.”
The CPU Unit has been protected due to a detected issue. The manual's first action is: “Remove protection from CPU Unit memory.”
The CPU Unit has encountered a memory error. The manual's first action is: “01. Recreate the data specified by the 2nd byte of the detailed error code. 02. Clear memory using procedure in the PLC operation manual.”
Event timed out due to a system timeout condition. The manual's first action is: “Replace the CPU Unit.”
The system setup area is insufficient for the current configuration. The manual's first action is: “Reduce the number of CPU Bus Units.”
The CPU Unit failed to initialize properly. The manual's first action is: “Replace the CPU Unit.”
The CPU detected an unrecognized I/O device or address. The manual's first action is: “Create the I/O tables.”
CPU Unit service monitor error indicates a problem with the CPU unit's monitoring system. The manual's first action is: “Check the operating environment.”
The CPU Unit has detected a watchdog timer error. The manual's first action is: “Replace the CPU Unit.”
The socket was closed during an opening procedure. The manual lists no action for this code.
A communication error occurred with the remote node (ETIMEDOUT). No remote exists. The manual lists no action for this code.
A parameter error occurred at the remote IP address (EHOSTUNREACH). Incorrect router setting. The manual lists no action for this code.
A parameter error occurred at the remote IP address (ENETUNREACH). No network number in IP router table or incorrect router setting. The manual lists no action for this code.