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Goody

E600 keys locked

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I have a customer in touch with me through email. He has an E600 that he says the backlight has failed and a message on the screen that says Backlight Error, Keys Locked And as he says, the buttons do not work so he can't use the controls even though he can still read the screen. He says he has read that this is an option when programming - lock keys when light fails. I have never heard of that before (but then I have never heard of a multitude of faults with the E series hmi's) Has anyone seen this message before? Is the program still recoverable in this state? and can it be reprogrammed to remove this lockout Thank you

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Never seen, but 'm thinking it's due to a fault of hardware (PS of backlight , or may be the backlight is short circuit). I'd check all electrolytic capacitors on the HMI PCB at first step.

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I've never seen it too, but it seems strange that he can see everything on the screen even with a broken backlight. I've seen a couple of broken backlights on the E-series, and they usually either work or don't work (so if it's broken I would suspect him not to see anything at all...). Maybe someone programmed it to be like this, but I don't think it's a generic option in E-Designer. I do believe that it would be possible to read the program, and alter it too, so try that one out first... Also take a look at Inntele's suggestion...

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I've searched every option in the E designer help and settings for this screen and I can find nothing that pertains to the backlight apart from how long before it goes off when not used. I've told him that I can upgrade it to an E1060 but he feels that, that is throwing the baby out with the bathwater. Ironically, he is telling me that I can upload the program, alter the lockout and download it again. I don't think I can. It's a long trip to visit the site and I don't want to look a fool because a 'know-all' says I can do it. If I go I will check the capacitors etc to see if I can repair it.............

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I agree, however I still think that you have the possibility to download/upload the program. If the keys are locked this is probably something that is done inside the program, hence it shouldn't affect the normal up-/download of the program. In any way you can say that you're not sure if it will work or not in advance, and thereby put some of the responsibility on the customer since he doesn't want to upgrade the terminal...

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