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telrefaie

CP1E power off retained address value

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Hello everyone,,,,,,,

i am new to Omron PLC , i have a CP1E-E20 plc, i need to have program a symbol to hold a 1 or 0 value and to be safe in it even if the power has been switched off and back on again, can this be done while this certain model doesn't have a battery ?

TIA :)

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You could use a Holding Relay (H bit) if the power is off for less than 50 hours (see below). If it is off for longer than 50 hours, the value will not be retained.

nobatCP1E.thumb.jpg.0e5c1a0c51d46b346070

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1 hour ago, Michael Walsh said:

You could use a Holding Relay (H bit) if the power is off for less than 50 hours (see below). If it is off for longer than 50 hours, the value will not be retained.

nobatCP1E.thumb.jpg.0e5c1a0c51d46b346070

Dear Michael,

 

thanks for the fast reply, if the cut off period is more than 50 hours what is the solution ? i have searched around and found some info regarding backing up data memory area but its unclear to me.

 

 

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39 minutes ago, telrefaie said:

if the cut off period is more than 50 hours what is the solution ?

Buy a PLC that has a battery. CP1E-N processors can use a battery for just a little more money.  The program converts easily in seconds.

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