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Why is putting time with seconds on the screens a bad idea?

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Tanquen
Lt. Commander Tanquen
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‎2020-06-29 05:22 PM
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‎2020-06-29 05:22 PM

Why is putting time with seconds on the screens a bad idea?

If you have hacked ClearSCADA to show the time on the screen, support mentioned you should not show the seconds and I recently had some work on an existing ClearSCADA system and not only do they display seconds but also thousandths of seconds. Should the seconds be removed? I’m guessing it’s a performance thing, forcing all the points on the currently viewable screens to update?

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BevanWeiss
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‎2020-06-29 08:46 PM
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‎2020-06-29 08:46 PM

Re: Why is putting time with seconds on the screens a bad idea?

It's going to depend...

 

a) showing the seconds can be a little misleading, since if the client is connected to the non-Main server they may not see this increment every second.

b) If you have your tag subscribe set to defaults then it's already 1second for most tags, and 0.5seconds for 'Fast' tags.  So the data retrieval aspect won't be significant.

c) showing milliseconds doesn't have any real benefit that I can think of... it will still only update the value at the normal / fast rate.. was there any info on why milliseconds were being displayed?

d) the animation load of a seconds thing shouldn't be a big concern.. depending on what you're actually doing with it.  I've got some very questionable animations which use the seconds to do psuedo-scrolling text... I wouldn't' recommend that.


Lead Control Systems Engineer for Alliance Automation (VIC).
All opinions are my own and do not represent the opinions or policies of my employer, or of my cat..

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BevanWeiss
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‎2020-06-29 08:46 PM
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‎2020-06-29 08:46 PM

Re: Why is putting time with seconds on the screens a bad idea?

It's going to depend...

 

a) showing the seconds can be a little misleading, since if the client is connected to the non-Main server they may not see this increment every second.

b) If you have your tag subscribe set to defaults then it's already 1second for most tags, and 0.5seconds for 'Fast' tags.  So the data retrieval aspect won't be significant.

c) showing milliseconds doesn't have any real benefit that I can think of... it will still only update the value at the normal / fast rate.. was there any info on why milliseconds were being displayed?

d) the animation load of a seconds thing shouldn't be a big concern.. depending on what you're actually doing with it.  I've got some very questionable animations which use the seconds to do psuedo-scrolling text... I wouldn't' recommend that.


Lead Control Systems Engineer for Alliance Automation (VIC).
All opinions are my own and do not represent the opinions or policies of my employer, or of my cat..

See Answer In Context

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Tanquen
Lt. Commander Tanquen
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‎2020-07-06 11:06 AM
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‎2020-07-06 11:06 AM

Re: Why is putting time with seconds on the screens a bad idea?

Thanks for the info. None of those sound that bad. I don’t know why they are showing thousandth of seconds. Even if it worked or updated that fast it would not be readable. Right now it just randomly shows some number every second or so. They didn’t say why just that is was not good to put even the seconds on a ClearSCADA screen. I like to on other SCADAs so you can easily see the system is running or if it is running slow and not updating consistently.

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AdamWoodland
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‎2020-07-06 07:48 PM
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‎2020-07-06 07:48 PM

Re: Why is putting time with seconds on the screens a bad idea?

Usually the timestamp popular for printing mimics so someone knows the time of the data at a later moment, but anything sub second is pointless.

 

It's worse on WebX the update rate of 5 seconds, and any ViewX or WebX clients connected to a standby can be a few seconds more between updates than clients connected to the main due to the synchronisation.

 

 

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