Watson Industries, Inc.
SPS-P230 Rev A 10/17/2017
22
Appendix B
Activating Command Mode (Double Spacebar Mode)
1) Connect the unit to a DC power source that is off.
2) The viewing computer needs a valid bi-directional RS-232 serial port. Connect the serial
port of the Watson sensor to the computer’s serial port.
3) Open a terminal program (such as HyperTerminal) to interface with the unit. The default
baud rate of the unit is 9600 baud. Make sure the computer’s serial port is open.
4) Power-on the unit. A startup message will be transmitted by the unit and will appear in the
terminal window unless it has been suppressed (See RS-232 Input Commands above).
5) During initialization, hit the space bar twice within close succession.
Note: The sensor initialization time begins after the startup message is transmitted.
Typically, this time period lasts 5 seconds, but could be as long as 127 seconds depending
on your sensor.
6) Wait until after initialization is finished. At this point, command mode will be activated and
the unit will accept keyboard commands.
Note: Most Watson sensors have initialization times that are shorter than 30 sec. Any extra
keystrokes (other than two spacebars) sent during initialization will deactivate command
mode.
**It can often take a few attempts to get the hang of step 5. Repeat steps 4-6 until successful.
Determining Output Channels
1) Activate Command Mode (See above).
2) To determine which channels are present, first type '&'.
This will bring up the main menu:
3) Typing in '4' will show which channels are currently active.
TYPE IN THE NUMBER OF YOUR SELECTION (OR 'Q' TO QUIT):
1 = ADJUST TIME CONSTANT
2 = SET JOYSTICK/AXIS PARAMETERS
3 = SET OUTPUT CHANNELS
4 = LIST CURRENT OUTPUT CHANNEL SELECTION
5 = SET NEW BAUD RATE
