About error 2540
Question
Error 2540 is displayed on the GC-A2 series display.
Can you please tell me what kind of error this is?
Answer
This phenomenon is caused by the “password setting” mode, a function of our PLC.
There are two types of password settings: “normal password” and “multi-mode password”.
When the PLC password setting is “normal password”, error code 2540 will be displayed when “bit data ON/OFF” or “register write” is performed from the display unit.
To avoid this, set the password to “multi-mode password”.
An 8-digit password beginning with “A” is a “multi-mode”.
Just like with a “normal password”, it is not possible to change the PLC ladder, but it is possible to “force bit data ON/OFF” and “force register write”.
If your PLC does not have a “multi-mode password” function, set it so that the password function is not used.
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