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RS485 chip enable with RTS

Hi..
I´m working with RS485 (chip SN75176), and I need use the flow
control of the serial port init to enable (disable) this chip with the
signal control RTS of the RS232 port.
I have change the settings of the serial port init, but this don´t
work.
I hope that someone can help me, and tell me how make a right
control of the RTS signal under Labview.

Thanks..
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Hugo Cantuarias wrote:

> Hi..
> I´m working with RS485 (chip SN75176), and I need use the flow
> control of the serial port init to enable (disable) this chip with the
> signal control RTS of the RS232 port.
> I have change the settings of the serial port init, but this don´t
> work.
> I hope that someone can help me, and tell me how make a right
> control of the RTS signal under Labview.
>
> Thanks..

Use the VISA serial driver. I believe it allows you
to control the RTS line.
Kevin Kent
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  1. Place a 'VISA configure Serial Port'  VI on the block diagram.
  2. Right click its 'VISA resource name out' terminal.
  3. Navigate to Create >>  Property for instr class >> » Serial Settings » Modem Line Settings >> Line RTS state.
  4. Right click on "RTS State" and select 'change to all write'.
    5. Create constant and 'Assert' 10ms before sending data  'Unassert' immediately after sending data.

 

All the best !!

 

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