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HMI tag I/O field gets 0 value and PLC tag has 0 value when monitoring

6/19/2019 4:20 AM	Rate (0)
Sonduter Experienced Member Joined: 12/27/2017 Last visit: 10/20/2023 Posts: 20 Rating: (1)	Hi everyone , i want to discuss this problems of my scada system. when PLC station is power off , HMI tag I/O field in which i set a integer value for PLC tag auto get 0 value and PLC tag have 0 value when i monitor . sorry because my english is very bad . ------------------------------------------------------------------------------------------ Split from Preserving the I/O Field Value.
	Last edited by: Jen_Moderator at: 06/19/2019 12:01:56 New subject after splitting
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6/19/2019 1:33 PM	Rate (0)
Mr.V Silver Member Joined: 6/19/2019 Last visit: 4/18/2025 Posts: 721 Rating: (77)	Maybe i will be wrong but you need to do a retained integer on your PLC

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6/21/2019 1:55 PM	Rate (0)
Sonduter Experienced Member Joined: 12/27/2017 Last visit: 10/20/2023 Posts: 20 Rating: (1)	Sure, i set retain tags in datablock but it's not working . when PLC is power off , HMI tag set 0 and PLC's tag reveive 0 from HMI Tag . Can i set limit value higher than 0 for HMI Tag?

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6/21/2019 2:15 PM	Rate (0)
Sonduter Experienced Member Joined: 12/27/2017 Last visit: 10/20/2023 Posts: 20 Rating: (1)	Mr.V Maybe i will be wrong but you need to do a retained integer on your PLC Hi Mr.V . I could set limit for I/O field input/output. I will check PLC tag's value when PLC is power off .

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