With IPHost Network Monitor you can run simple snmp requests against a HP device in your network.
icfVgGroupLastOperStatusChange
HP ICF Vg Group Last Operation Status Change
1.3.6.1.4.1.11.2.14.8.1.1.2.1.1.5
An object that contains the value of sysUpTime at the time that the value of the icfVgGroupOperStatus object for this group last changed. A value of zero indicates that the group's operational status has not changed since the agent last restarted.
Back to hp-icf MIB page.
IPHost Network monitor allows you to monitor icfVgGroupLastOperStatusChange on Hewlett Packard device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.