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working hours counter

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Irbis
Posts: 3
Joined: 14/10/2021, 22:42

working hours counter

Post by Irbis »

Hello everyone, in my automation program for an ammonia compressor I made an hour meter but every time the HMI is turned off it clears the working hours.
My question is if there is a way to keep the operating hours variables no matter the HMI is turned off?
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Pixsys tecnico 1
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Re: working hours counter

Post by Pixsys tecnico 1 »

Hi,
you need simply use RETAIN variables with the FuntionBlock, in you case CON_SEC, CON_MIN and CON_HOUR.
In this way the times are stored also after a power off and the FunctionBlock continues to increase that values.
Irbis
Posts: 3
Joined: 14/10/2021, 22:42

Re: working hours counter

Post by Irbis »

Pixsys tecnico 1 wrote:Hi,
you need simply use RETAIN variables with the FuntionBlock, in you case CON_SEC, CON_MIN and CON_HOUR.
In this way the times are stored also after a power off and the FunctionBlock continues to increase that values.

Hello Mr. Pixsys I did what you suggested but it still does not store the time value after a shutdown of the HMI pixsys 810.
Can you please send me an example? 8-)
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Pixsys tecnico 1
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Re: working hours counter

Post by Pixsys tecnico 1 »

Keep in mind that the retain value is stored every 30 seconds, so the power on time must be at least that time.

To set the attribute "retain" to a variable:
retain_attribute.PNG
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