Witek Posted September 15, 2021 Report Share Posted September 15, 2021 Hi, I have a model PLC JZ20-J-R31-N . I have to reset actual program . Someone can tell me how can I do this procedure? I will be gratefull for the answer. Grettings Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted September 18, 2021 MVP 2023 Report Share Posted September 18, 2021 What do you mean by "reset"? If you mean erase the program that's in there, then downloading a new program will do that automatically. Quote Link to comment Share on other sites More sharing options...
Witek Posted September 18, 2021 Author Report Share Posted September 18, 2021 My PLC is locked a password and I can't enter a new program Quote Link to comment Share on other sites More sharing options...
DanT Posted September 20, 2021 Report Share Posted September 20, 2021 Hi; The M91 and JAZZ Series PLC's have 2 Passwords that can be set. 1 Password BLOCKS ALL Communications to the PLC ( No download, no upload, no devices that need communications to operate) When this is set, then you have to know the password to unlock it. 1 Password allows communication, BUT does not allow UPLOAD of the program unless you have the password. There is NO Backdoor to getting to the program if these passwords are set Refer to Help -- Project properties for the explanations. If the PLC was programmed by the machine manufacturer, then contact them. They had reasons to protect the PLC from being tampered with. DanT Quote Link to comment Share on other sites More sharing options...
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