Ken,
According to my documentation, the 0x9B yy (short form AIU status) command is supported by by the V7.x.x/V1.65B combination.
The 0x8A yy (long form AIU status) command is not.
Although I unfortunately don't own an AIU to test with, my V7.3.7/V1.65B Power Cab combination does respond to 0x9B yy with two bytes of data (not surprisingly 00 00). It ignores an 0x8A yy command.
If someone has an AIU and V7.3.7/V1.65B system, they could test this with the NCE Command Monitor and Send NCE Binary Command windows in JMRI. The "yy" is the cab bus (hex) address of the AIU you are interrogating.
Since only the short form is supported, you can get current status, but not whether a particular input has changed since last read.
--
Dave in Australia
The New England Convention 2018
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On 7 Mar 2018, at 2:28 PM, 'Ken Cameron' kcameron@... [jmriusers] <jmriusers@...> wrote:
AIU readback isn't supported in the PowerCab/SB3/SB5/Twin series of systems.
There wasn't enough room in the memory for it to hold that information.
Only the PowerPro command station (CS02) supports letting JMRI know what the
AIU devices are seeing.
