i had an ab field engineer come check out the system to bypass the password protection. his solution was to erase the memory on the system and install an older version of the software onto the plc (he had a copy of the systems software prior to a huge upgrade). now the system is completely...
i've be appointed the glorious task of linking with a plc that i did not program.
i have almost no information on the system. i only know that it is a allen bradley micrologix 1500 (which i never have used) and i need (hence recently purchased) rslogix500
so i have to go into this system blind...