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Jhon Vargas

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Jhon Vargas


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Posted By Jhon Vargas Jun 29, 2022 05:27:56 PM
Found In Egroup: Automation Control
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Thank you Edward. Sorry I may have not phrased my question clearly. I am aware of how to read/write tags from Echo via API (in fact that is what I have been working on as of late). My question is about modifying System Values (SV as opposed to tags) via Echo API. Any ideas? Regards, Jhon
Posted By Jhon Vargas Jun 28, 2022 10:15:00 PM
Found In Egroup: Automation Control
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Hi, I have a L85 PLC application which is running in FT Echo. The PLC code uses GSV (get system value) instructions to check the status of the communications module (EN2T) . If the communications are deemed faulty (according to the value returned by GSV) the drive is stopped or inhibited. The GSV ...
Posted By Jhon Vargas May 26, 2022 02:44:00 PM
Found In Egroup: Automation Control
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Hi Joe, Those are the beauties of MODBUS! A couple of things I would: the obvious one is that nothing is overwriting you buffer register in your PLC (as defined by the "LocalOffset" property of the Transaction) The other useful thing you can do is to toggle (set to 0) the "ReqBuilt" bit. Many times ...
Posted By Jhon Vargas May 26, 2022 02:31:55 PM
Found In Egroup: Automation Control
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Thanks Ed. You are right, that (a loop using RegisterTag) is what I am doing at the moment, and it works fine. Is there a new API version coming? and if so, when? Thanks Ed. Regards, Jhon
Posted By Jhon Vargas May 25, 2022 10:35:33 PM
Found In Egroup: Automation Control
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Hi, Is there a function in the Echo API to register multiple tags in a single call? I know about the RegisterTag() function for registering a single tag, but wondering if there was a RegisterTags() function that can be used to register multiple tags, and it returns an array with the corresponding TagHandles ...
Posted By Jhon Vargas May 12, 2022 04:00:00 PM
Found In Egroup: Automation Control
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Hi Michal, Thank you for your response. As an exercise, I tried to read an individual structure member as you suggested. A call to RegisterTag("MyTag.Inp_Running") returns a valid handle (> 0). However when I try to read the tag information using GetTagInfo(), I get a "Tag Not Found" error. In the ...
Posted By Jhon Vargas May 07, 2022 05:11:00 PM
Found In Egroup: Automation Control
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Hi, I am reading a structure (UDT) using GetDataTypeInfo API. The structure has some boolean members: For the boolean members, I can get the ByteOffset, but the MemeberData type does not have a "BitOffset" property that I can use to know the position of the boolean member within the byte. I have ...
Posted By Jhon Vargas Apr 28, 2022 04:34:00 PM
Found In Egroup: Automation Control
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Hi Ed, Thank you for replying. Yes, I am using the SDK and have been using the documentation, including sample code. I must say though that the SDK documentation lacks detail and there are even errors (e.g. ...to mention just one example. Anyway, if tis is the place to raise questions about Echo, ...
Posted By Jhon Vargas Apr 27, 2022 08:05:00 PM
Found In Egroup: Automation Control
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Hi Ronald, I have had similar issues using the SDK. They went away once I started running Studio 5000, Visual Studio and Echo db in Admin mode. Give it a go see if it helps. Cheers, Jhon
Posted By Jhon Vargas Apr 15, 2022 05:57:00 PM
Found In Egroup: Automation Control
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Hi Mark, I am implementing an interface for Echo in ProcXim, and found it is great but having a few issues with reading certain data types from it. Have searched a lot but found little. Could you point me to a forum / email that I can submit technical questions to? Thanks. Jhon