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 Multidrop RS-485 on Graphics Client doesn't work		  Forum Locked
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KnowledgeBase

296 Posts
Posted - 26 Feb 2002 :  14:33:08  Show Profile  Email Poster
Q: RS-485 multidrop doesn't seem to work on my Graphics Client.

There can be several reasons for this.
  • You must set "RS485"=dword:1 in the [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\Serial] registry key of the onboard registry file, ADSLOAD.REG.

  • Older Graphics Client boards require a different transceiver to work in multidrop configurations. Contact ADS if you have multidrop requirements. ADS WinCE builds 1.55 and later support RS-485 multidrop capabilities. All versions will work with RS-422.

jlynch

22 Posts
Posted - 12 Oct 2004 :  04:58:40  Show Profile  Email Poster
Hi,

I am using the graphics client plus RS485 port for a half-duplex multi-drop application (modbus).
I am running linux 2.4.19. What are the issues with the transceiver mentioned above?
The board revision I have is rev B (170110-8000B)
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rwhaley

628 Posts
Posted - 12 Oct 2004 :  17:52:31  Show Profile  Email Poster
The issue raised about "older graphics client boards" refers only to the "Graphics Client" not the "Graphics Client Plus". The Graphics Client Plus hardware does not have this problem.
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