Hi guys, my site uses mainly Mitsi PLC's & HMI's so not familiar with AllenBradley but i have two Micrologixe 1200 PLC's connected to Panelview 300 HMI's. The machines are twenty plus years old and now both HMI's are barely legible as the screens are so dim. I want to upgrade the HMI's as they are obsolete but my problem is, the program within the PLC is Password Protected and i cannot read, upload or download to the PLC. The original manufacturer has been taken over some years ago and no-one knows the password. They have sent me an old program that could possibly work which is not password protected, but i cannot download it to the PLC without the original Password.
Can anyone help me?