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There is a button on machines to set the next charge period.
The fields of 'Next Var Charge Run Period' and 'Next Min Charge Run Period' are set once a meter charge run has been completed for machines.
You really should not constantly be changed these two fields.
The only time, you really should change the period is when you set up a machine initially.
Procedure for one machines
Ensure the appropriate period is open
Just highlight the machine, then press the action button 'Set Charge Period'.
Ensure the appropriate period is open
See example screen print below.
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