When choosing a heartbeat setting, balance between the need to display the latest managed product status information and the need to manage system resources. Trend Micro's default settings is satisfactory for most situations, however consider the following points when you customize the heartbeat setting:
Long-interval Heartbeats (above 60 minutes)
The longer the interval between heartbeats, the greater the number of events that may occur before Control Manager reflects the communicator status on the Control Manager management console.
For example, if a connection problem with a Communicator
is resolved between heartbeats, it then becomes possible to communicate
with a Communicator —
even if the status appears as 
(inactive) or 
(abnormal).
Short-interval Heartbeats (below 60 minutes)
Short intervals between heartbeats present a more up-to-date picture of your network status at the Control Manager server. However, this is a bandwidth-intensive option.