CPU Parameter Not Found

What does E11-18 mean?

The CPU was unable to locate at least one required parameter during operation. This parameter error can prevent proper configuration or execution of CPU functions, potentially leading to system misbehavior, incomplete startup, or a halt in processing. It indicates a configuration or memory issue.

• Corrupted PLC program or hardware configuration file loaded into the CPU's memory.
• Firmware mismatch between the CPU and the loaded program, where a parameter exists in one but not the other.
• Parameter definition missing or incorrectly declared in the engineering software project (e.g., via configuration block P_CFG).
• Memory corruption within the CPU's non-volatile memory storing operational parameters.
• Attempting to access a parameter that has been deprecated, renamed, or is incompatible with the current CPU model or firmware revision.

Click steps to track your progress.

1. 1

   1. Upload the current PLC program and hardware configuration from the CPU and compare it against the master project file.

2. 2

   2. Perform a full download of the correct PLC program and hardware configuration from the engineering workstation to the CPU.

3. 3

   3. Check the CPU's firmware version and ensure it is compatible with the engineering software version and the project.

4. 4

   4. Perform a CPU memory reset (cold restart or factory reset) and then re-download the program and parameters.

5. 5

   5. Consult the PLC programming manual for the specific parameter (e.g., P_IO_CONFIG_ADDR) that is reported as not found.