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Eremiaion · Junior Joined: 02 Apr 2019 Posts: 3

Hello. I have a m221 and use basic somaks to programe it. The problem is the following. I use %mw0:x0 to allocate a button on off HMI, If on the HMI press the button to set him "ON",and pull the voltage from HMI and M221, when power supply, the button is still "ON", it does not return to an initial state "OFF". HMI i use a Weintek 8070 programmed with easybuilder pro. How can I do that when I power the HMI and M221, the button to be OFF, even if the voltage was off when the button was ON. Thank you.[url=http://www.99poze.ro/p/f48b982110c2a0c52bd661e4aa4184cd.jpg] M221 and somachine basic power on forced bitto be off M221 and somachine basic power on forced bitto be off

M221 and somachine basic power on forced bitto be off M221 and somachine basic power on forced bitto be off

[/url]+[url=http://www.99poze.ro/p/172d78716a7db8ea9e431a376f806a57.jpg] M221 and somachine basic power on forced bitto be off M221 and somachine basic power on forced bitto be off

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electro · Junior 2 Joined: 26 Apr 2012 Posts: 21

Hi,

I guess one possibility is to implement a kind of life bit between plc and HMI to know if the HMI is connected (or powered on, it is not the SAME, but you can say that if it is not connected it is almost the same as powered off).
If this life bit is OFF or ON after some time out that means loosing of connection or HMI powered off and after that you can set/reset the bits you want.