Solution 1:
1. Edit the file \\OpManager\\conf\\Ping.properties
2. Remove the "#" against "timeout=1" and Change the timeout value to 4. This setting will make OpManager to wait for 4 seconds, if the device did not respond.
3. If you wish to change the number of packets sent to check the availability of the device, remove the "#" against "count=" specify the desired number of packets to be sent to check the availability.
4. Save and exit the file after the changes and Restart OpManager service for the changes to take effect.