Noland Engineering RS11 v3.0 Manual page 6

4. Operation
Once configured and calibrated, the RS11 operates autonomously with no intervention required. Appendix B and Appendix
C contain details regarding configuration and calibration. A green flashing LED indicates the unit is sending data, while a red
flash indicates received messages or errors.
Output Data Monitoring
CANbus data is virtually impossible to view without special display units. Therefore the RS11 provides some simple data
sentences in NMEA 0183 format, which can be viewed in any Terminal window. This data may prove useful in initially con-
figuring the RS11, but it may also be used to separately monitor the RS11data being applied to the CANbus.
To monitor the RS11 via its Serial Port, connect the PC serial cable per Figure 1. The RS11 must also be connected to a
CANbus network before it will start sending data. With a Terminal window open and the PC connected to the RS11 COM_
Port at 4800 baud, text sentences should appear in the window. The provided RS11 Setup Utility contains such a viewing
window.
The sentences beginning with
$ERRPM, , 0, x x x x, ,
contain the calculated RPM value for each configured engine instance. The sentence contains both the Instance ID (usually
'0' or '1') and the RPM value (shown as x x x x). If the RPM seems wrong it may be due to the wrong "ppr" value in the
RS11. See Appendix B for instructions on changing the RPM ppr value(s).
The sentences beginning with
$PNOLA, x x . x, x x . x, x x . x, x x . x,
A1 , A2 , A3 , A4
contain raw values measured at the analog inputs, A1-A4 in that order. The values read as "% of full-scale" from 0.0 - 99.9,
where the full-scale value is set by the analog input jumpers within the RS11. When you are configuring the RS11, you can
actually use this data instead of a voltmeter. Simply multiply the value(s) above by the full-scale jumper setting of that input
and you have the measured voltage.
Finally, if errors occur, a sentence beginning with
$PNOLE,..
will be seen, which contains error codes. These codes are deciphered in the next Section (Troubleshooting).
Troubleshooting
Error codes (TDB)
Reset/Shutdown Hookup:
The Shutdown/reset interface consists of a 2-pin
header on the circuit board and a mating cable. The
cable can be wired to an external contact closure to
stop (shutdown) the RS11 or simply reset it. It could
be implemented as a manual switch, relay closure, or
oil pressure switch as shown below. The red wire is
the "Shutdown /reset" connection for the RS11. The
black wire is internally connected to RS11ground and
is not needed if the switch or contact closure is already
grounded. Momentarily connecting it to ground resets
the RS11, while holding it to Ground keeps the RS11
in its shutdown state.
Figure 5
Reset Hookup