System Overview; Operating Modes; Command Mode; Ping Mode - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

System Overview

This section presents a functional description of H-ADCP operation using block diagrams.

Operating Modes

The H-ADCP has two modes of operation: command mode, and ping mode (also referred to as "Deploy-
ment Saver" Mode). Depending on what mode the H-ADCP is in; it will go either to sleep, or to resume
pinging.

Command Mode

Whenever you wake up your H-ADCP, power dissipation increases from less than 1 mW to around 2.2 W.
If you leave the H-ADCP in command mode without sending a command for more than 5 minutes, the H-
ADCP automatically goes to sleep. This protects you from inadvertently depleting batteries.
•
If the H-ADCP receives a BREAK, it will go to the command prompt and wait for a command.
The H-ADCP will wait at the command prompt for five minutes. If no commands have been
sent, it will go to sleep (also called "Battery Saver" mode).
•
If you press the reset switch (located on the CPU board), the H-ADCP will go to sleep.
•
If the H-ADCP receives a CS-command, it will go into the ping mode and begin pinging. If a
TF-command (Time of First Ping) was sent prior to the CS-command, then the H-ADCP will
go to sleep until the TF time occurs.
•
If the H-ADCP does a COLD wakeup (i.e. an unknown state), it will go to the command
prompt.
•
If the H-ADCP is asleep for approximately nine hours, it wakes up to charge the capacitor
used to maintain RAM. Once the capacitor is charged (this only takes a few seconds), the H-
ADCP goes back to sleep.

Ping Mode

After you send commands to the H-ADCP that tells it to start collecting data, the H-ADCP goes into de-
ployment saver mode. If power is somehow removed and later restored, the H-ADCP simply picks up
where it left off and continues to collect data using the same set up.
•
If the H-ADCP receives a BREAK, it will go to the command prompt, but stays in the ping
mode. If a valid command is received, the H-ADCP will switch to the command mode. If no
valid command is received, a warning will be displayed after four minutes, indicating that the
system will self-deploy. After a total of five minutes with no input, the H-ADCP will resume
pinging.
•
If you press the reset switch, and an alarm is currently set for the next ping, the H-ADCP will
go to sleep. If no alarm is set, the system will start a new deployment and starts pinging im-
mediately unless a TF-command had been set after the last BREAK. In this case, the H-ADCP
will go to sleep until the TF time occurs.
•
If the H-ADCP does a COLD wakeup, the system will start a new deployment and starts ping-
ing immediately unless a TF-command had been set after the last BREAK. In this case, the H-
ADCP will go to sleep until the TF time occurs if the TF time is valid (i.e., not in the past).
•
If the H-ADCP is asleep for approximately nine hours, it wakes up to charge the capacitor
used to maintain RAM. Once the capacitor is charged, if a valid alarm is set for the next ping
time, the H-ADCP goes back to sleep and waits for the alarm. If no alarm is set, the H-ADCP
will resume pinging immediately, or wait for the TF time (if valid), and then start pinging.
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
May 2015
Page 91