A power outage during standby corrupts the DSP microcode. The bootloader sees a checksum mismatch and halts with WAAA-087.
What’s improved:
The error code WAAA087 generally appears within the CX-Programmer environment (part of the CX-One software suite) when a user attempts to modify a variable's value or properties while online with the PLC.
While the exact hexadecimal mapping of Omron internal error codes is proprietary, the "WAA" prefix typically denotes a Workspace/Window Application Attribute error. The number 087 specifically relates to a violation of variable mutability.
When the software reports that a variable is "Fixed," it does not merely mean "it cannot be changed." It means the variable has been assigned a specific memory attribute that prohibits runtime modification via the standard Watch Window interface.
Upon identifying the issue, our team promptly initiated an investigation to understand its root cause and potential impact fully. Following a collaborative approach, we analyzed the problem, developed a strategy for resolution, and implemented a fix. The process involved rigorous testing to ensure that the solution would effectively address the issue without introducing new problems.