Illegal Access Error

What does A295.10 mean?

An attempt was made to access memory in an unauthorized manner, and the PLC Setup is configured to stop operation on an instruction error, leading to a fatal program error (0x80F0). This includes reading/writing parameter areas, writing to non-installed memory, writing to an EM bank configured as EM file memory, writing to a read-only area, or using an indirect DM/EM address not in BCD when BCD mode is specified. The error address is output to A298/A299.

• Attempted reading/writing of a parameter area.
• Attempted writing to memory that is not physically installed.
• Attempted writing to an EM bank configured as EM file memory.
• Attempted writing to a read-only memory area.
• Indirect DM/EM address is not in BCD format when BCD mode is specified for addressing.

Click steps to track your progress.

1. 1

   Identify the program address where the error occurred using A298 and A299.

2. 2

   Correct the instruction to ensure memory access is valid and authorized.