From the NCE Power Pro manual:
AIU BROADCAST ENABLE
The system can be set to have any connected AIU (Auxiliary Input Unit) automatically outputs its status via the RS232 port on the system box whenever an AIU input changes. This is disabled by default. Press ENTER to skip setting this parameter.
As Ken has said, the design of JMRI is such that it cannot cope with unsolicited broadcast messages from the NCE command station while it is waiting for a response to another command it has sent to the NCE command station.
So when you add AIU sensors, JMRI sends regular 0x8A yy (Return status of AIU yy) commands for all known AIUs. This process is known as polling and is subject to your computer and JMRI being free enough to send a command and accept a response.
--
Dave in Australia
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On 1 Jul 2017, at 1:14 AM, nicholas_murphy@... [jmriusers] <jmriusers@...> wrote:
What are AIU broadcasts and what problems/symptoms should I expect in JMRI?.
I only ask because I'm using NCE Power Pro 5, NCE AIU, sensors and JMRI script to measure speed of train going round my DCC test track in order to test speed response of RFID reader.
