Scheduling Tasks Every XX days

[MisterB.Ohio]

I have an application where the unit needs to go through a calibration cycle every so often.  This interval will be specified as a number of days between calibrations and a time of day for it to take place.  There is also a screen where the calibration can be triggered manually (or through modbus).

I am using a V430 PLC programmed through Visilogic.  The timers only go to 100 hours, if the task is scheduled for every 15 or 20 or 30 days, what signal can I use to trigger a count down timer once a day?  I can set up a decrementing counter for the number of days and trigger the calibration cycle and reset the "# of days counter."  But how do I trigger it?

 

[Flex727]

Use a self-resetting 24 hour timer to increment a counter. When the counter reaches the appropriate number of days, it will trigger the action you want. Then reset the counter to start again.

[MisterB.Ohio]

Quote

Use a self-resetting 24 hour timer to increment a counter. When the counter reaches the appropriate number of days, it will trigger the action you want. Then reset the counter to start again

This will work if it was just a number of days.  But the calibration needs to start at a specific time.

[Flex727]

Under Utils/Clock, there are functions that allow you to specify action based on Time of Day, Day of Week, Day of Month, etc.

[MisterB.Ohio]

Thank You.  figured it out... by triggering the counter at the specified time of day,  it will start when desired.