Is there a system register that stores the HMI serial number?

No, the serial number for the HMI is not stored in a system register, and can only be found on the sticker on the back of the HMI.

If you would like to have this number accessible from the HMI screen, we suggest creating a User Defined String tag using RW (Retentive) memory to store the value on the HMI and display it on the screen.

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