Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 14 Apr 2016 11:13:22 -0500

Hi Kathryn,

On 04/14/2016 10:43 AM, [email protected] wrote:
> I have just written an Asyn driver for the Lambda TDK Genesys power
> supply, and I got it working after realising that before I can get it to
> do anything with comms I have to address it properly. This is RS232
> comms, but for some reason these PSUs seem to demand that the first
> command I send it when trying to interact with it is an “ADR” command
> with its RS485 address.

You are using the RS232 interface, but it might be good to ensure that
your driver works with RS485-connected devices on a shared bus. I'm not
sure what the standard Asyn way is of doing that, but you may have to
include the ADR command in the Stream protocol as part of every command
(since some other record that addresses a different device may get
processed in between sending your command strings). Mark Rivers' answer
may be a better solution for the RS232-only or non-shared RS485 case.

> So, the simple version of the question:
> 
> Does PINI respect the PHAS field?

Yes, since R3.14.11 — the RELEASE_NOTES.html file for any Base-3.14
version since then has a discussion on those changes.

- Andrew

-- 
There are only two hard problems in distributed systems:
  2. Exactly-once delivery
  1. Guaranteed order of messages
  2. Exactly-once delivery
 -- Mathias Verraes

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System