# Help! Launch tag by time

**URL:** <https://forum.inductiveautomation.com/t/help-launch-tag-by-time/24481>\
**Category:** Ignition\
**Created:** [April 29, 2019, 8:21pm UTC](https://forum.inductiveautomation.com/t/help-launch-tag-by-time/24481 "2019-04-29T20:21:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Oleh](https://avatars.discourse-cdn.com/v4/letter/o/b4bc9f/32.png) [@Oleh](https://forum.inductiveautomation.com/u/Oleh)\
**Post date:** [April 29, 2019, 8:21pm UTC](https://forum.inductiveautomation.com/t/help-launch-tag-by-time/24481/1 "2019-04-29T20:21:23Z")

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I have a problem.  
There is a solar power station where 80 inverters are installed. Each inverter has a power regulation function via a tag.  
It is necessary to set the value for example: the power plant should work tomorrow at 11:00 with the total power of 2000 kW, 12:00 2100 kW and so on … How can this be implemented? Requires 2000KV / 80 = 25KW (this value should be automatically recorded to each inverter )

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [April 30, 2019, 12:06pm UTC](https://forum.inductiveautomation.com/t/help-launch-tag-by-time/24481/2 "2019-04-30T12:06:26Z")

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Please provide more information about your setup for more specific help, but in general, you would want a timer script that regularly checks the time and looks up (in a DB) or calculates what that setpoint should be at that moment, and writes the tag accordingly. I would normally arrange this sort of short term scheduling to be done in a PLC, and Ignition would only load the target time/setpoint pairs into the PLC.

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [April 30, 2019, 12:44pm UTC](https://forum.inductiveautomation.com/t/help-launch-tag-by-time/24481/3 "2019-04-30T12:44:46Z")

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Dude! Don't post multiple topics for the same problem! I just found your other post:

> [@Inverter power control](http://forum.inductiveautomation.com/t/inverter-power-control/24494):
>
> I have a problem. I im using ignition 7.5.12 Connecting connecting inverters via modbus tcp. There is a solar power plant where 80 inverters are installed. Each inverter has a power regulation function by a tag. It is necessary to set the value for example: the power plant should work tomorrow at 11:00 with the total power of 2000 kW, 12:00 2100 kW and so on … How can this be implemented? Requires 2000KV / 80 = 25KW (this value should be automatically recorded to each inverter )