12/17/2015 4:42 PM | |
Posts: 5225 Rating:
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Hi everyone, The problem I have is described in the FAQ: Why is it sporadically not possible to operate the CPU The problem is when the process is running, there are some variables (counters) that sometimes need to be changed by the operator. It has happened before that the value is changed and then seconds later the value changes back to the original. My program style has process values in a DB which are handed to relevant FB code blocks via IN/OUT parameters. According to the above FAQ this is a problem.
The FAQ further makes a suggestion:
Please help me.. what does this (underlined) mean? Thanks for your attention. |
Last edited by: William_B at: 12/17/2015 4:43:07 PMLast edited by: William_B at: 12/17/2015 4:48:19 PMAdd a quote about InOut parameters |
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12/18/2015 1:58 PM | |
Joined: 10/10/2005 Last visit: 8/29/2024 Posts: 1917 Rating:
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Hello William, the problem in this case are the two processes of the PLC and HMI systems which run parallel independently of each other. The variables will be overwritten when both systems write on the same. This is as system property. See also the informations in the FAQ with example and remedy (link): https://support.industry.siemens.com/cs/ww/en/view/109478253 With best regards |
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