PLX Devices DM-100 OBDII - Manual (Page 12)

Users Guide: iMFD User Guide
Version 1.0 Jan 1, 2008
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12
3.3.2 Data Polling
Data Polling means that the SM-OBD “gets” an updated value from the vehicle’s ECU (Engine Control
Unit). You can choose to turn ON or OFF Data Polling for Sensors 1,2,3,4. The more sensors you have
set to ON, the slower the refresh rate will be. It is recommended that you turn on data polling only
on sensors you wish to monitor, thus maximizing performance. By default, your unit comes
preprogrammed with only sensor 1 data polling ON. Sensor 2,3 and 4 are by default OFF.
For example, If you have your SM-OBDII set to:
Sensor1 = RPM
Sensor2 = Throttle Position
Sensor3 = Vehicle Speed
Sensor4 = Timing
And
Sensor1 Data Polling = ON
Sensor2 Data Polling = ON
Sensor3 Data Polling = ON
Sensor4 Data Polling = ON
RPM, Throttle Position, Vehicle Speed and Timing will all be monitored. However, the refresh rate of each
sensor is divided into 4. If you only wish to monitor RPM and nothing else, by setting
Sensor1 Data Polling = ON
Sensor2 Data Polling = OFF
Sensor3 Data Polling = OFF
Sensor4 Data Polling = OFF
Will lead to higher performance for sensor 1.
3.3.3 Programming Sensors Modules
Each sensor module, can be programmed into any of the available OBDII sensors. A list of the sensors are
below and can be programmed in the following setup menu. Keep in mind that if your vehicle may not
support all the sensors listed below.
1) ABS THROTTLE (Absolute Throttle Position)
2) ENGINE RPM
3) VEHICLE SPEED
14) FUEL PRESSURE
15) O2VOLTAGE 1B1 (Narrowband O2 Sensor Voltage 1 Bank 1)
16) O2VOLTAGE 1B2 (Narrowband O2 Sensor Voltage 1 Bank 2)