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 Post subject: HMI slow response
PostPosted: Wed Dec 07, 2011 3:02 am 

Joined: Mon Dec 05, 2011 9:47 pm
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Hi,
On demand how to update tag values from controller (approx. 200 tags) written in script module? The tags used are in sequential order.

If we use always active setting, these tags will be continuously polled and performance of the HMI is slow.

iX panel used is iXT70 and controller is Mitsubishi FX3U PLC

At present we are using Tag.Read() for each tag in the script module

Best regards,
Rajendra Mahajan


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 Post subject: Re: HMI slow response
PostPosted: Wed Dec 07, 2011 10:46 am 
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Joined: Fri Jul 15, 2011 3:21 pm
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If Tag.Read() is not working, then I'm not aware of another way.

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Beijer Electronics, Inc.
Ron Lloyd | Applications Engineer


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 Post subject: Re: HMI slow response
PostPosted: Tue Dec 20, 2011 9:55 pm 

Joined: Mon Dec 05, 2011 9:47 pm
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Is there any other way to read block(group) of tags from plc?
This will reduce the time required to fetch tag data than fetching the tag data individually.


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 Post subject: Re: HMI slow response
PostPosted: Wed Dec 21, 2011 9:58 am 
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There is not a way to do that, but depending on the driver being used, addresses that are next to each other may be grouped together in the background for better performance.

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Beijer Electronics, Inc.
Ron Lloyd | Applications Engineer


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 Post subject: Re: HMI slow response
PostPosted: Wed Dec 21, 2011 10:00 am 
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You might be able to use the datatype "String" to read a block of ASCII data, but I have not tested it and the behavior may vary depending on the driver you are using.

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Beijer Electronics, Inc.
Ron Lloyd | Applications Engineer


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