[Elecraft] KPA500 serial interfaces

[Doug Person]

I think the point is that RS-232 does not, as a protocol, support 
polling. Nothing prevents you from doing some sort of polling 
programmatically. However, multiple devices on a single RS-232 line is 
beyond what the protocol was designed for. That's why there is RS-485 - 
which IS designed for multi-device control.

Doug -- KJ0F


On 2/11/2019 2:55 PM, Andy Durbin wrote:
> "I have no idea how your "polling" device works, but with RS-232, there is no polling,"
>
> Point 1 is true. Point 2 is, in my opinion, not true.
>
> A poll is a request for information.  The device issuing the poll/request is the polling device.   For example, sending IF; to a TS-590 is a data request, or poll, for the current IF status.  The TS-590 responds with the full IF word.
>
> Andy, k3wyc
>
>
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-- 
73 de Doug -- KJ0F