MOTEC M400 M600 M800 CAN

ECU connections

ECU CAN SETUP

The CAN setup should be configured for mode 8 (Custom Data Set 1 Sequential) in the CAN 0 Data slot, with the address set in decimal, as shown in the screen capture below. Note that the CAN address is configurable, but the examples below will use 1520, which is 5F0 in hexadecimal.

CUSTOM DATA SET 1

Go to the �Setup Custom Data Sets� option on the menu, and set up Custom Data Set 1 to send the channels you want to transmit to the third party dash. Note that the order of the channels in the list here is important, as this determines whereabouts the channels are positioned in the CAN messages transmitted by the ECU.

CAN MESSAGE STRUCTURE

Once the CAN setup has been configured as described above, the channels are allocated to the CAN IDs in the following way, depending on their position in the list. IDs below are listed in hexadecimal starting from the specified ID. Each channel is broadcast in 16-bit format, taking up two bytes.

5FO
	Channel 1	Bytes 0-1
	Channel 2	Bytes 2-3
	Channel 3	Bytes 4-5
	Channel 4	Bytes 6-7

5Fl
	Channel 5	Bytes 0-1
	Channel 6	Bytes 2-3
	Channel 7	Bytes 4-5
	Channel 8	Bytes 6-7

5F2
	Channel 9	Bytes 0-1
	Channel 10	Bytes 2-3
	Channel 11	Bytes 4-5
	Channel 12	Bytes 6-7

5F3
	Channel 13	Bytes 0-1
	Channel 14	Bytes 2-3
	Channel 15	Bytes 4-5
	Channel 16	Bytes 6-7

5F4
	Channel 17	Bytes 0-1
	Channel 18	Bytes 2-3
	Channel 19	Bytes 4-5
	Channel 20	Bytes 6-7

If more than 20 channels are being transmitted, the allocation of channels to CAN IDs continues in the pattern shown above.

CAN SPECIFICATIONS

The MoTeC M400 M600 M800 CAN-series ECU operates with the following CAN parameters:

Bus speed 1Mbit/s
Standard length identifiers
Normal/Motorola/Big Endian alignment
Channel scaling for each parameter is detailed in the document �PSAU0015 MoTeC M800 Data Set 3 Protocol�
Transmit frequency is user definable, but normally 50Hz for all channels

Race Technology MOTEC M400 M600 M800 CAN standard configuration

ECU Name	Race Technology message	Race Technology Default name	Race Technology VAR number	Resolution
RPM	Engine RPM	RPM	VAR_0010	1 RPM
Throttle Position	aux 1	Throttle position	VAR_2000	0.10%
Manifold pressure	pressure 5	Boost pressure	VAR_3504	1 kPa
Air temp	temperature 1	temperature 1	VAR_1000	0.1 oC
Engine temp	temperature 8	Water temp	VAR_1007	0.1 oC
Lambda 1	misc 1	Lambda 1	VAR_4000	0.001
Fuel pressure	pressure 3	Fuel pressure	VAR_3502	1 kPa
Oil temp	temperature 9	Oil temp	VAR_1008	0.1 oC
Oil pressure	pressure 2	Oil pressure	VAR_3501	1 kPa
Exhaust Gas Temp 1	temperature 17	Exhaust 1 temp	VAR_1016	0.1 oC
Battery volts	misc 3	Battery voltage	VAR_4002	0.01V
Speed 1	aux 26	Auxiliary 1	VAR_2025	0.1 KPH
Speed 2	aux 27	Auxiliary 2	VAR_2026	0.1 KPH
Speed 3	aux 28	Auxiliary 3	VAR_2027	0.1 KPH
Speed 4	aux 29	Auxiliary 4	VAR_2028	0.1 KPH

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.