Example Master/Slave Setup - Teledyne WORKHORSE Operation Manual

WorkHorse H-ADCP Operation Manual

Example Master/Slave Setup

To set the Master/Slave:
1. Connect the master and slave ADCPs to two PC comports via a master/slave cable.
2. Apply power to the ADCPs.
3. Establish RS-232 communications between BBTalk and the master and slave ADCPs.
4. Set both the master and slave ADCP to the same baud rate (see Note 1).
5. Send a BREAK to the master ADCP.
6. Verify that the master ADCP outputs the RS-232 banner (see Note 2).
7. Send a CR1 and CK command to the master ADCP.
8. Send a BREAK to the slave ADCP.
9. Verify that the slave ADCP outputs the RS-232 banner.
10. Send a CR1 and CK to the slave ADCP.
11. Send the configuration commands to the master ADCP, omitting the CS command to start sam-
pling.
12. Send the configuration commands to the slave ADCP including the CS command to start sam-
pling.
13. Now send the CS command to the master ADCP.
The master samples, and triggers the slave, which samples. This continues until the power is not
available, or the user or some other force intervenes.
To terminate data collection:
1. Send a BREAK to the master ADCP (see note 2).
2. Verify that the master ADCP outputs the RS-232 banner (see note 2).
3. Send a CZ command to the master ADCP.
4. Send a BREAK to the slave ADCP.
5. Verify that the slave ADCP outputs the RS-232 banner (see note 2).
6. Send the CZ command to the slave ADCP.
1. The master and slave ADCP must use the same baud rate. Baud rate options depend on
whether the master and slave ADCP are allowed to go to low power mode between samples.
When the master and slave cannot go to low power mode between samples, the user can select
all baud rates less than 115200 (i.e. one can use 1200, 2400, 4800, 9600, 19200, 38400, or
57600 baud).
When the master and slave ADCP can go to low power mode between samples, the user can
select 1200, 2400, 4800, or 9600 baud.
2. The master slave cable connects the units via an RS-485 bus so the master ADCP can trigger
the slave ADCP to sample. The RS-485 bus can alternately be used for RS-422 communications.
However, during initialization, when the master ADCP receives a BREAK and outputs the
wakeup banner, it also may cause the slave ADCP to output an incomplete banner. When this
occurs, send additional BREAKs to the master ADCP until the slave ADCP outputs a full RS-422
banner.
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
May 2015
Page 193