This parameter sets the time interval of the Heartbeat message that will be sent. It is specified in minutes.

When the Heartbeat Message is enabled, press F1 (upper left Function key next to display).

Enter a value (in minutes) between 1-999. Press ENTER to accept.

Example: 30 will initiate a working key download every thirty (30) minutes. Be advised, this will put the terminal temporarily out of service for a short duration until the key has successfully been downloaded.