resume programe after power off

[foaad]

Hello

How to force a System as (Washing Mashine) to resume its Program after a power off. from where power off occured. as an ex. it was stopped due to power off in the zone number Four. assuming program consist of six zones

 

[itsmoked]

foaad; Start using CAPITALIZATION. Your questions are hard to read otherwise and most members don't bother to even read them.

There is no way to force an electrically/electronically controlled system to start up from where it lost power unless they are designed to provide that ability. Sorry..

Keith Cress
kcress -

http://www.flaminsystems.com

 

[foaad]

At first.. Sorry for writing problems. Then

There is no way to force an electrically/electronically controlled system to start up from where it lost power unless they are designed to provide that ability



Yes sure itsmoked. So iam asking about PLC programming technique which can perform this task and if thier is an exeternal digital parts will be used. Thanks

 

[foaad]

Note.. System is resumed when power is ON again from where it was losted

 

[fangas]

I suppose, if you've already got a plc, or want one. You could use a small UPS and set up a bit to sense power loss. At power loss, use that bit to halt operation. And restore it when power returns.

Beware of safety factors. Like a person shutting down the machine by disconnecting power. Automatic restart could be dangerous.

Personally, I can't think of many operations with machinery where I'd like unattended start up.

 

[foaad]

Thanks fangas.