UIM Robot (controller probe) periodically communicates with hub for life-and-death(heartbeat) monitoring. However, the communication sometimes fails and "Robot xxxx is inactive" alarm is published. User might be able to figure out the cause from network socket error code.
How to confirm network socket error code?
controller probe will record network socket error code to controller.log if loglevel is more than 3. The format is "sockConnect - connect to <hupip> 48002 failed <network socket error code>".
loglevel can be changed on Admin Console/Infrastructure Manager.
v7.8 controller AC Configuration
v7.8 controller IM Configuration > Misc
The error is described in the link below.
ERRNO(3) - Linux Programmer's Manual