Data Logging Power Saving Mode |
By default, the Trimble NetRS receiver will operate continuously as long as power is available. For sites with limited power availability, the Power Saving Mode may be used to enable the receiver to power down and sleep between data logging sessions or between periods of operation. This mode of operation is intended for installations where internal data logging is the primary application, and where continuous communications with the receiver are not necessary.
The Power Saving Mode is controlled from the Data Logging Power Saving page. Clicking the Yes radio button enables the system to shut down when there are no active data logging sessions. Clicking the No button disables the Power Saving Mode.
When the Power Saving Mode is enabled, the NetRS will monitor the status of all enabled data logging sessions. When there are no active sessions, and none are scheduled in the near future, the NetRS will set an alarm to wake up for the next scheduled session and then shut itself off. The alarm will wake up the NetRS a few minutes prior to the next scheduled session, and data logging will begin at the scheduled time. This process will repeat until there are no further scheduled sessions, at which time the system will shut itself off without an alarm, and stay asleep until manually started.
Several items about the Power Saving Mode should be noted:
The Failsafe Wakeup Alarm modifies the behavior of the Power Saving Mode. It defines time windows during which the receiver will always be awake and available for communications, regardless of the current state of session-based data logging. This function is designed to protect against complete loss of communications on remote systems that use the Power Saving Mode.
The wakeup interval is user programmable and can be set to occur every 1, 2, 3, 4, 6, 8, 12, or 24 hours. The wakeup duration can be set to 5, 10, 15, 30 or 60 minutes. The wakeup periods are always synchronized to a UTC 24 hour clock so that the periods in which the receiver is awake are well defined. For example, if the duration is set to 15 minutes, and the interval is every 8 hours, then the NetRS is guaranteed to be awake every day from 00:00 to 00:15, and from 08:00 to 08:15, and from 16:00 to 16:15 (all times in UTC).
The Failsafe Wakeup Alarm is particularly useful when a finite number of sessions are defined and then run to completion. Normally the Power Saving Mode would then put the NetRS to sleep until the user did a forced power up through the keyboard. This would prevent all further communication with the system. In this case, the Failsafe Wakeup Alarm could be used to guarantee daily time windows when communications could be re-established.
EXTREMELY IMPORTANT - If Power Saving Mode is enabled, and if no future session is pending, and if the Failsafe Wakeup Alarm is not enabled, it will not be possible to perform communications with a remote site. The receiver will not power up until the front panel Power button is pressed.