I have one FX40 with about 3 DX9100 and about 25 VMAs (VAV boxes), every few seconds I get a ping failed then few seconds later ping success alarm message in the alarm console.
I have not worked with N2 bus much but I am pretty sure the bus is good and it is a setting in FX40 that needs adjusting, I just don't know where and what.
It is also only the VMAs that are causing this message, almost all of them, none from the DXs.
I looked at the ping settings but need guidance as to which one to start tweaking.
I have got what i believe are default values (I say default because I have inherited this job) of:
Under JciN2Netwrok property sheet I have
ping delay = 00.400s
response timeout = 00.0250s
Inter Message Delay = 00.002s
Ping interval is hidden by default in FX40, when I look at it though, it is set to 5 min, but I know the driver is pinging devices much faster than that if the occurance of ping fail/success message is any indication.