RADIUS Health Check timeout

Here is more info:

I've enabled Monitor Logging and watching monitor's log file. Monitor runs every 30 sec (the 'Interval' value in the settings), looks good:

tail -f /var/log/monitors/'monitor'.log|egrep "Debugging session beginning at|response"

2015-10-26 10:40:57.344956: ID 330   :(_response_success): node was up and is still up [ addr=::ffff:node_ip_address:node_port srcaddr=none mon= snd_cnt=9 rcv_cnt=8 ]
********** Debugging session beginning at: Mon Oct 26 10:41:26 2015
2015-10-26 10:41:27.363458: ID 330   :(_response_success): node was up and is still up [ addr=::ffff:node_ip_address:node_port srcaddr=none mon= snd_cnt=10 rcv_cnt=9 ]
********** Debugging session beginning at: Mon Oct 26 10:41:56 2015
2015-10-26 10:41:57.267989: ID 330   :(_response_success): node was up and is still up [ addr=::ffff:node_ip_address:node_port srcaddr=none mon= snd_cnt=11 rcv_cnt=10 ]

now, I stopped service on the monitored server. Monitor runs every 30 sec, as it should, but timeout is only ~5sec. (log does not show timestamp in event when 'failed')

********** Debugging session beginning at: Mon Oct 26 10:42:26 2015
Failed to get a response in the time required <- Failed response only takes ~5 sec>
********** Debugging session beginning at: Mon Oct 26 10:42:56 2015
Failed to get a response in the time required <- same, only takes ~5 sec>

Where do I set the time required value?