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ECUType / OMEX600And710

OMEX 600 and 710 ECUs

The OMEX 600 and 710 ECUs with V0.70 firmware are fully configurable in terms of which channels of data are transmitted and at what data rate. To be compatible with the Race Technology ECU decoder the ECU must be set up to output the following channels of data:

Byte Name Units Scalar Offset Min Max Signed?
1 Air temp oC 1 0 -128 127 Y
2 Air pressure kPa 0.5 0 0 127.5 N
3 Battery Volts 0 0 0 15.93750 N
4 Fuel 1 PW µs 512 0 0 131070 N
5 Spark adv(map) o 0.3515 -30 -30 59.64844 N
6 RPM 50 rpm 50 0 0 12799.80469 N
7 MAP as Load kPa 0.3922 0 0 99.99847 N
8 Coolant oC 1 0 -128 127 Y
9 Lambda1 Lambda 0.0078125 0 0 1.992188 N
10 Throttle % 0.3922 0 0 99.99847 N
11 Lambda2 Lambda 0.0078125 0 0 1.992188 N
12 Lambda Target Lambda 0.0078125 0 0 1.992188 N

Baud rate is set to 38400baud with standard checksum. Start byte must be set to 0x00

The data is translated in the following manner:

ECU Name Race Technology message Race Technology Default name Race Technology VAR number Resolution
Air temp temperature 1 temperature 1 VAR_1000 0.1 oC
Air pressure pressure 1 Ambient air pressure VAR_3500 1 mBar
battery misc 3 Battery voltage VAR_4002 0.01 V
Fuel 1 PW aux 6 Fuel inj 1 PW VAR_2005 1 ms
Spark adv (map) angle 2 Ignition angle VAR_3001 0.1o
RPM 50 Engine RPM RPM VAR_0010 0.1 Hz
Map as Load pressure 5 Boost pressure VAR_3504 1 mBar
Coolant temperature 8 Water temp VAR_1007 0.1 oC
Lambda1 misc 1 Lambda 1 VAR_4000 0.01 lambda
Throttle aux 1 Throttle position VAR_2000 0.1%
Lambda2 misc 2 Lambda 2 VAR_4001 0.01 lambda
Lambda Target temperature 12 Tyre 1 temp VAR_1011 0.01 lambda

The OMEX ECUs can be tuned using MAP3000 or MAP4000. Below are the steps to take when using either of the two softwares. Please take note of the one suitable to your application.


OMEX MAP3000 software is used to configure the ECU to output these data channels. This is carried out by selecting the “telemetry setup” option from the “user advanced” menu. Load the .sts file from the CD supplied with the ECU Serial Interface to automatically load the correct channel settings, or select the channels manually.

As well as loading the .sts file, you must set up the following to turn the serial output on from the ECU:

If using the MAP3000 software please set it up like this:

MAP3000 | User Advanced | Telemetry setup | Load

Select the supplied RT_DASH2_12Channel.sts file

Options | Full list.

Select the following options:

Telemetry UART = ON
Tele1 Chan 0 = ON


If using MAP4000 software, the ECU must be connected to the PC in a different way ECU > Connect must not be used. Instead a copy of the calibration must be saved on the PC used for mapping. When starting a new session in MAP4000, the existing calibration must be resent to the ECU using ECU > Send New Calibration Shown in the below image.

Whilst calibrating the ECU, it is important to periodically save any changes made to the map, to ensure that the calibration file is safe in the event of the PC shutting down unexpectedly. Any of the below options can be used to save the file.

  • Save
  • Save As
  • Save New Version

Please Note: If the copy of calibration in the ECU is lost and the software has been closed since the last connection, it will not be possible to recover the calibration. The calibration process will need to be restarted.

Everytime the MAP4000 software is closed, the Calibration file will need to be loaded onto the ECU using ECU > Send New Calibration

Race Technology supply an Omex direct connection cable:


  • A CD packaged with the ECU, contains both a Telemetry and Non Telemetry base map, for connection to Race Technology Products it is imperitive that the Telemetry base map is used as a starting point for the tune.
  • 600 ECU must be v0.70D or later. The letter will not appear in the software, they need to look on the ECU itself.
  • 710 ECU must be v0.70C or later. There were no non-working versions of 0.70 on the 710 so if it shows 0.70 in the software it will be fine.
  • If your OMEX 710 ECU is running version 0.89 firmware or later your will need different firmware on your Race Technology ECU Serial Adapter. Please specify this when ordering or contact Race Technology if you require the alternative firmware for your ECU Serial Adapter.

Note - Not all channels listed in the table(s) above may be available from your ECU. This can be dependent on the vehicle model & year of manufacture.

Page last modified on March 10, 2021, at 02:53 PM