Re: [ts-7000] Re: rs232 vs rs485

["Don W. Carr" <>]

See here for a description of NULL modem and the pinouts of the cable.

http://en.wikipedia.org/wiki/Null_modem_cable

On 8/23/06, Yan Seiner <> wrote:

--- In ts-7000%40yahoogroups.com, "Art" <> wrote:
>

> Yan
>
> Thanks for the quick responce. The question I was asking was intent
> on getting some information on a com port that has the ability to run
> rs485 vs a com port that can just run rs232. I have a TS-7200 with
> rs485 capable port. I have it setup to run rs232. I am running
> rs232 on the other end. I have hardware and software flow control
> disabled on both ends. Yet it seems to stop sending/receving. But
> what I was asking is for the diffrences in hardware on the ts-7200
> for just rs232 vs (rs232 and rs485) on a com port. I get the same
> software to run fine on COM1 vs COM2(get's stuck).
>

As someone else said, com2 only has 2 lines; no hardware control at
all. So if the thing on the other end needs hardware flow control,
you will have to build a null-modem cable that loops the appropriate
pins back to itself. It's been a while since I've built one of those,
so I don't remember off-hand, but there are two pairs of pins that
have to be 'shorted' on the end that expects hardware flow control.

I haven't played with the various settings on the TS7200 end; maybe
you can turn them on via tioctl or something...

--Yan

-- 
Dr. Don W. Carr
J. G. Montenegro 2258
Guadalajara, Mexico
+52-333-630-0704
+52-333-836-4500 ext 2930

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