St - Slave Timeout; Sw - Synchronization Delay - Teledyne WORKHORSE Operation Manual

May 2015

ST - Slave Timeout

Purpose Sets the amount of time a slave will wait to hear a synch pulse before proceeding on its
own.
Format STn
Range n = 0 to 10800 seconds
Default ST0
Recommended Setting. Special applications only.
This command has no effect unless SM = 2
Description ST sets the amount of time a slave will wait to hear a synch pulse before proceeding on its
own. If a slave times out, it will automatically ping according to the CF, TP, TE, WP, and
BP command settings. This is a fail-safe mechanism designed to allow the slave to pro-
ceed on its own should communications with the master H-ADCP fail. Setting ST = 0 tells
the slave to wait indefinitely.

SW - Synchronization Delay

Purpose Sets the amount of time to wait after sending the pulse.
Format SWn
Range n = 0 to 65535 (units of 0.1 milliseconds)
Default SW00075
Recommended Setting. The default setting for this command is recommended for most applications.
This command has no effect unless SM = 1 or 3
Description Use the SW command to set the amount of time to wait after sending the pulse before
proceeding. For example, setting the SW command to SW20000 will add a delay of 2 sec-
onds. This allows precise timing of measurements.
When a Master attempts to ping a slave H-ADCP, it sends out a pulse to the slave
H-ADCP. The slave H-ADCP has a different code path than the Master H-ADCP and thus,
they will take different amounts of time to start the ping. By adding in the default Master
Delay of 7.5 ms, the code paths are evened up to allow the units to start the pings at about
the same time (typically within 100 microseconds of each other).
Page 192
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
WorkHorse H-ADCP Operation Manual