JRP Edge Digital Gauge
-
AFR + Spartan 3 CAN
14point7 MS3 Appendix Page: 11 onwards.
Page 8 of 10
Manual - 52mm Edge AFR + Spartan CAN
Lean Burn & Oxygen Metering Applications
For Applications where the BOSCH LSU 4.9 or ADV Oxygen sensor is primarily
operated in a lean or positive oxygen environment, the sensor is prone to error
caused by electrode charge build up known as CSD error.
By sending a “SETPERF2” serial command the oxygen sensor will be operated in such a way as to mitigate CSD error. SETPERF2 wi
ll
cause a response time penalty in rich conditions and should not be used for normal engine applications that require fast response
times in rich exhaust gas. The Spartan 3 CAN Bus and Spartan 3/Lite Linear output can be changed to show % Oxygen instead of
Lambda. Sending a “SETCANFORMAT4” will change Spartan 3 CAN Bus output and Spartan 3/Lite linear output to show % Oxygen.
The linear output will output 0[v]@0%O2 linear to 5[v]@21%O2.
The Spartan 3 %O2 CAN Format is below:
Spartan 3’s CAN Bus operates with 11 bit addressing.
Default CAN Baud rate is 500kbit/s
Default CAN Termination resistor is enabled, this can be changed by sending “SETCANRx” serial command.
Default CAN Id is 1024, this can be changed by sending “SETCANIDx” serial command.
Data Length (DLC) is 4.
Default Data Rate is 50 hz, data is sent every 20[ms], this can be changed by sending “SETCANDRx” serial command.
Data[0] = %O2 x100 High Byte
Data[1] = %O2 x100 Low Byte
Data[2] = LSU_Temp/10
Data[3] = Status
%O2
= (Data[0]<<8 + Data[1])/100
Sensor Temperature [C]
= Data[2]*10
Status:
To be disclosed
