Re: COMM failed status of Fire Alarm 8000 series

["A.J." <aj@xxxxxxxx>]

Un needed overhead and you are not really monitoring for the disconnection
at the fire panel side. I still believe it is better to monitor the DTR out
at the fire alarm control panel with the PC's DSR IN.





"albertleng" <albertleng@xxxxxxxxx> wrote in message
news:1157956989.325276.309770@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> Hi Friends,
>
> I think i have found a way to solve it.
>
> Since the Fire Alarm cant receive from my PC (it only sends to my PC),
> i use Tx of RS232 of my PC side and short it to pin 8, CTS. Then, i use
> a timer to trigger MSComm1.Output in which Tx will send something to
> CTS.
>
> If we disconnect the connector to the PC, the Tx and CTS are not
> shorted anymore and there's no more sending from Tx to CTS.
>
> Albert