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Use a button to set a tag true or false

10/16/2023 8:29 AM	Rate (0)
AutoGen_8296280 Joined: 10/3/2023 Last visit: 12/4/2025 Posts: 1 Rating: (0)	Hello . im currently using win CC Unified Comfort Pro . I want to use a button to set a tag true or false . On the first press I want it to become true if it’s false and stay that way On the second press I want it to become false if it’s true and stay that way . How can I create something like that with either JS or events ? ------------------------------------------------------------------------------------------ Split from How to toggle a push button at the ''EVENTS'' SET and RESET in WinCC Unified?.
	Last edited by: Jen_Moderator at: 10/16/2023 11:42:34 New subject after splitting
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10/16/2023 11:54 AM	Rate (0)
ZickZackTIA Silver Member Joined: 6/22/2017 Last visit: 1/15/2026 Posts: 424 Rating: (59)	If i do understand you correctly you want to invert the current state of the bit/tag. Simply try the systemfunction "InvertBitInTag" and select your Bool tag. For Bit number let it be "0". The bitnumber defines which bit should be inverted. Starting from 0. So 0 means the first bit. Best regards ZickZackTIA

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10/16/2023 12:52 PM	Rate (0)
rdoliveira Platinum Expert Joined: 4/26/2012 Last visit: 1/9/2026 Posts: 1657 Rating: (191)	Hello, welcome to the forum. As previously mentioned, the simplest thing is to use the "InvertBitInTag" function. But if you want an example in javascript, go here. if (Tags("HMI_Tag_bool").Read() == true) { HMIRuntime.Tags.SysFct.ResetBitInTag("HMI_Tag_bool", 0); } else { HMIRuntime.Tags.SysFct.SetBitInTag("HMI_Tag_bool", 0); } good luck.
	Last edited by: rdoliveira at: 10/16/2023 12:53:01 Last edited by: rdoliveira at: 10/16/2023 12:54:34 edit "Always make a backup before performing any tests and check the best time to do so. Obrigado.
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This contribution was helpful to 1 thankful Users Murof

10/20/2023 1:34 PM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 1/15/2026 Posts: 16638 Rating: (1944)	Hello AutoGen_8296280 But if you use this functions check also this FAQ: https://support.industry.siemens.com/cs/de/en/view/109795137 Bye Murof
	Last edited by: Murof at: 10/20/2023 13:34:37 If this Information really helps, you could use the Rate function
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This contribution was helpful to 1 thankful Users Libor Ptacek

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