![]() ![]() (Note that ComLite32 does not work with NT/2000 – I used W98) Setting The Keyword A1S Processor I had a distinct advantage over some users, whereby I did not have a protected PLC to crack, I had an unprotected one which I could set any keyword in I can’t tell from the discussion threads whether or not it was successful so I had a go myself and documented the findings for the use of others. ![]() ![]() Not very good if you do not have the original code to begin with! I read an article on the forum on (where someone was asking the question on keywords and one user suggested the use of Comlite32 to discover what was going in and out of the com port. Mitsubishi Electrics UK technical support have been asked if it is possible to identify or get round the keyword, their answer is no, you must clear the PLC memory and start again. If you haven’t got the key, you can’t get in. If a keyword has been set within the processor, it is required in order to read the program from the PLC to be able to monitor / modify the program. Introduction The keyword within a Mitsubishi processor consists of a string of characters in the range 0-9 and A-F, in the case of the A-Series these are six characters long and in the FX they are 8 characters long. Written By Ian Sullivan Application Software required: Melsec GX Developer Comlite 32 (Available free from ) NOTE: This technique is intended as a work around when you have been left with a password protected PLC and the original installer has gone bust! A Technique to discover the password or “keyword” stored in Mitsubishi A series and FX series PLC’s ![]()
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