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  7. Modbus TCP - How to read strings in holding registers

Modbus TCP - How to read strings in holding registers

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03 Oct 2017 20:04 #5569 by ee12205
Replied by ee12205 on topic Modbus TCP - How to read strings in holding registers
Thanks.
i will try to contact the support.

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03 Oct 2017 04:57 - 03 Oct 2017 04:58 #5567 by support
Replied by support on topic Modbus TCP - How to read strings in holding registers
This forum is for QuickOPC client development toolkit, and your question does not relate to it. But I knew the answer, I would give it anyway. You should rather contact Kepware technical support, I think.

My only hint is that the registers might be 16-bit(?) and hold 2 ASCII characters, and therefore if you wrote e.g. "0x4142" into one and "0x4344" into the second, the consecutive registers may start to form a string?

Regards
Last edit: 03 Oct 2017 04:58 by support.

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02 Oct 2017 22:21 #5565 by ee12205
Modbus TCP - How to read strings in holding registers was created by ee12205
Hello,

I'm trying to develop one application using Modbus TCP using a Modbus TCP/IP Ethernet channel.
The goal of the application is send one string (10 char) to the Kepware. And at this moment i can send just one char per Holding Register.
For example, for 400001 i load "0x41", for 400002 i load "0x42" ... 400010 i load "0x50" in Hex that means "A", "B", "C","..." in ASCII and then on the tag's of the kepware if i create one tag with HR 400001.2L as string, i can see the "A". But if i create one tag with 400001.20L, i should get 10char, right?
If i use a individual tags for each HR, like 400001, 400002, 400003 ... as string, i can see the respective char for each HR.

So, my doubt/ question is if is possible to read the 10 Holding Registers on the same string or tag?
do you have some idea, how to do it in the same string? It means, in the same tag read "ABCDEFGHIJ".

I'm using the KEPServerEX_V6.

Thanks,
LC
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