Communications

CAN Bus

Introduction

The ECU has 2 independent CAN Nodes.; CAN 1 and CAN 2. The Baud rate can be independently set for each node.

The ECU has 128 message boxes. This means the ECU can Receive or Transmits on 128 different Addresses. This is a very large number and offers great flexibility. In order the simply setup procedure the CAN 1 and CAN 2 will be separated into Channels, with each Channel having a fixed number of available messages boxes/addresses.

CAN Termination

The ECU does not include an internal 120ohm CAN terminating resistor. This allows the ECU to be placed at any location within the CAN bus system.

If the ECU is located at the end of the CAN bus, an external 120 ohm terminating resistor will need to be used.

CAN Nodes

CAN 1

CAN 1 node is divided up into 6 Channels, 64 message objects in total

MO = Message Object

CAN 1 Channel Number	Number of Message
CAN 1 - Channel 1	14 CAN message objects
CAN 1 - Channel 2	10 CAN message objects
CAN 1 - Channel 3	10 CAN message objects
CAN 1 - Channel 4	10 CAN message objects
CAN 1 - Channel 5	10 CAN message objects
CAN 1 - Channel 6	10 CAN message objects

CAN 2

CAN 2 node is divided up into 6 Channels, 64 message objects in total

CAN 1 Channel Number	Number of Message
CAN 2 - Channel 1	14 CAN message objects
CAN 2 - Channel 2	10 CAN message objects
CAN 2 - Channel 3	10 CAN message objects
CAN 2 - Channel 4	10 CAN message objects
CAN 2 - Channel 5	10 CAN message objects
CAN 2 - Channel 6	10 CAN message objects

Addressing

0: Single (11-BIT)
1: Sequential (11-BIT)
2: Single (29-BIT)
3: Sequential 29-BIT)

Base Address

Starting CAN Address / PID (Parameter ID). The CAN Base Address tells the ECU where to start transmitting data from.

These values are in DECIMAL, not hex.

Single

Only the single “CAN Address” is active. This means data can only be TX/RX on that single CAN Base Address

Sequential

The CAN address starts at the “CAN Address” defined then sequentially increments that address until all the data has been transmitted

Once the data (TX/RX) on the CAN Base Address is full, the ECU will poll the next address sequentially for additional data

IE 1250, 1251, 1252, …

Bandwidth Considerations

Bus bandwidth needs to be considered when data is transmitted over CAN. The ECU has Transmit rates from 10Hz up to 1000Hz.

Example 1:

The following uses the Predefined 1 Tx DATA set. This uses 10 sequential addresses and it total transmits the value of 40 parameters. CAN Baud rate at 1Mbps

Tx Rate	Number of Messages	Bandwidth Used (%)	Available Bandwidth for other devices
10Hz	10	1.2%	98.8%
50Hz	10	6.1%	93.9%
100Hz	10	12.2%	87.8%
500Hz	10	61%	39%
1000Hz	10	Cannot be achieved

Example 2:

The following uses the Custom 1 Tx DATA set. This uses 5 sequential addresses and it total transmits the value of 20 parameters. CAN Baud rate at 1Mbps

Tx Rate	Number of Messages	Bandwidth Used (%)	Available Bandwidth for other devices
10Hz	5	0.6%	99.4%
50Hz	5	3.05%	96.95%
100Hz	5	6.1%	93.9%
500Hz	5	30.5%	69.5%
1000Hz	5	61%	39%

OBD II J1979

Onboard Diagnostics 2 or OBD2 is supported by the ECU using the SAE J1979 standard. The ECU supports the following service requests:

Show current data
Mil Status
Show stored Diagnostic Trouble Codes (DTCs)
Clear Diagnostic Trouble Codes (DTC) and stored values
Request vehicle information

OBD II Service Mode 01 - Show Current Data

The ECU supports the following PIDs when the “Show Current Data” serviced is requested.

PID (hex)	PID (Dec)	Data bytes returned	Description	Min value	Max value	Units	Notes
01	1	4	Monitor status since DTCs cleared. (Includes malfunction indicator lamp (MIL) status and number of DTCs.)
03	3	2	Fuel system status				Only displayed when Closed Loop Fuel enabled. See Below
04	4	1	Calculated engine load	0	100	%
05	5	1	Engine coolant temperature	-40	215	°C
06	6	1	Short term fuel trim—Bank 1	-100	99.2	%	Only displayed when Closed Loop Fuel enabled
07	7	1	Long term fuel trim—Bank 1
08	8	1	Short term fuel trim—Bank 2
09	9	1	Long term fuel trim—Bank 2
0A	10	1	Fuel pressure (gauge pressure)	0	765	kPa	Only displayed when Fuel Pressure input enabled
0B	11	1	Manifold absolute pressure	0	255	kPa
0C	12	2	Engine RPM	0	16,383	rpm
0D	13	1	Vehicle speed	0	255	km/h
0E	14	1	Timing advance	-64	63.5	° before TDC
0F	15	1	Inlet Air Temperature	-40	215	°C
10	16	1	Final Mass Flow Rate	0	655.35	g/s	Note. This is Final flow rate, not MAF flow rate
11	17	1	Throttle Position/Servo Main (for DBW Application)	0	100	%
14	20	1	Narrow Band Oxygen Sensor 1	0	1.275	V	Only displayed when Narrow-band input enabled
15	21	1	Narrow Band Oxygen Sensor 2	0	1.275	V	Only displayed when Narrow-band input enabled
1C	28	1	OBD standards this vehicle conforms to				See Below
1F	31	2	Run time since engine start	0	65535	seconds

Supplementary Information

PID 0x03 - Fuel System Closed Loop Status

CAN Value	Suffix	Description
1	OPEN	Open loop due to insufficient engine temperature
2	CLSD	Closed loop, using oxygen sensor feedback to determine fuel mix
4	OPEN1	Open loop due to lockout condition or OFF (fuel cut due to deceleration, limiting, post start etc)
8	OPEN 2	Open loop due to system failure
16	CLSD1	Closed loop, using at least one oxygen sensor but there is a fault in the feedback system

PID 0x04 - Calculated Engine Load

There are 2 types of load defined by the SAE J1979, one is Calculated engine load the other Absolute engine load. The Calculated Load is referenced to engine speed, so its the %Engine Load at that RPM.

As defined by ODB II regulations Calculated load = (Current airflow / peak airflow @sea level) x (Baro @sea level / Baro) x 100%

PID 0x1C - OBD standards this vehicle conforms to

A request for this PID returns a single byte of data which describes which OBD standards this ECU was designed to comply with. Emtron replies with a value of 6

Value	Description
1	OBD-II as defined by the CARB

| 3 | OBD and OBD-II | | 4 | OBD-I | | 5 | Not OBD compliant | | 6 | EOBD (Europe) | | 7 | EOBD and OBD-II | | 8 | EOBD and OBD | | 9 | EOBD, OBD and OBD II | | 10 | JOBD (Japan) | | 11 | JOBD and OBD II | | 12 | JOBD and EOBD | | 13 | JOBD, EOBD, and OBD II | | 14 | Reserved | | 15 | Reserved | | 16 | Reserved |

CAN Bus Errors

CAN Diagnostics information can be found under the Communications Tab in the Runtime (F3) menu.

Last Error Code Status

Ack Error. This normally indicates the ECU cannot communicate with other devices on the BUS. Check all devices are running the same BUS Baud rate.
BIT 0 Error. If this error is constant, it normally indicates a direct short between CAN Lo and CAN Hi.
BIT 1 Error. If this error is constant, it normally indicates a direct short between CAN Lo and CAN Hi.
BIT 0 & Ack Error. If the error is toggling between these two messages, this normally indicates the CAN Lo and CAN Hi are reversed.

Command Bus Errors

Emtron Transmitting data , but receiving device is missing from the CAN Bus.

Emtron Transmitting data , but receiving device is missing from the CAN Bus and 120 Ohm terminating resistor missing.

CAN Bus Termination

CAN Bus High and Low are differential signals, so twisted pair MUST be used. Failing to do so will compromise the entire CAN Bus System.

Shielded twisted pair may be required to help with reliability and data integrity.

The less connectors in any transmission system the better. Unnecessary connectors are almost guaranteed to present an impedance discontinuity and hence may cause reflections and data loss.

CAN Bus termination must be done correctly by using a 120 ohm 0.25W resistor at each END of the bus system.

Maximum Stub length to a device from the main Bus is recommended at 0.3m, in accordance with High-Speed ISO 11898 Standard specification. See Figure 3.3.

The ELC devices do not include an on-board CAN termination resistor, allowing the device to be wired at any position on the Bus. CAN Bus termination must be done correctly by using a 120 ohm 0.25W resistor at each end of the bus system as mentioned above. Figures 3.1 and 3.2 show possible CAN Bus Implementation examples

Figure 3.1. CAN Bus Wiring Example. ECU and Dash at each end with 120 Ohm Termination

CAN Bus Wiring Example

ECU and ELC2 at each end with 120 Ohm Termination.
Stub Length less than 0.3m

CAN Bus Torque Modifier

This table is used to modify the torque calculation to be delivered as an output for use on an OEM Can Bus or other CAN bus applications. The Torque value can be “bent” allowing the user to change the behavior of a vehicle system e.g Traction or Gearshift . This gets applied as an offset to both the Engine Torque and Driver Demand Torque. Table range is +/- 500Nm.

The default table is a single cell without axis. However, both the X & Y axis are available and can be enabled at any time in the axis setup form.

CAN Custom RX Data Sets

Emtron can be configured to receive Custom Messages over CAN bus channels.

To Receive the Custom RX Data sets, select them under

Config -> Communications -> CAN Bus 1/2 -> DATA Set

** Scaling per data set will be fixed. IE - CAN Speed for Data Set 1 must all be the same

** Channels received are raw CAN runtimes. These channels must be assigned to “real” runtimes to be used in different sections of the ECU.

CAN Parameter Scaling

Info

All values are 16 bit unsigned intergers, LSB Byte Order

InfoUnlisted runtimes are raw

Type	Multiplier	Offset	Unit
Lambda	0.001	0	Lambda
Lambda Target Error	0.001	-10	Lambda
STFT/LTFT	0.01	-100	%
Cam Position	0.1	-200	Degree
MGP	0.1	-100	KPA
Fuel/Oil Pressure	0.1	0	KPA
PPS/TPS/Motor Position	0.1	-100	%
VE	0.1	0	%
IdleP	0.1	0	%
PP/TP Error	0.1	0	%
DBW Target Error	0.1	-100	%
Injector duty	0.1	0	%
Inj PW	0.001	0	ms
F/I Cut	0.1	0	%
Speed KPH	0.1	0	KPH
RPM ROC	1	-20000	RPM/second
PP/TP ROC	0.1	-100	%/second
ECU G	0.01	-10	G
Ignition angle	0.1	-100	Degree
Ignition trims	0.1	-100	Degree
FP Diff Offset	0.1	-1000	KPA
Voltage	0.001	0	Voltage
Drive Slip	0.01	-100	%
Temps	0.1	-50	Degrees C
Fuel Level	0.1	0	Liters
Fuel used	0.01	0	Liters
Gear	1	-10	Gear
Time Milliseconds	0.01	0	Milliseconds
Time Seconds	0.1	0	Seconds
Time Min	1	0	Min
Force	0.1	-100	KG
Mass flow /Sec	0.1	0	G/s
Mass flow /Cyl	0.001	0	G/cyl
Traction Target	0.1	0	%
Traction Target Error	0.1	-100	%
Power	1	0	KW
Torque	1	-1000	NM
Torque Reduction (Frictional loss)	-1	0	NM
Vehicle Accel (M/S/S)	0.01	-100	m/s/s
Vehicle Accel (KM/HR/S)	0.01	-100	km/hr/s

CAN Torque Limit

The ECU can receive Torque Limit Request(s) over the CAN Bus.

ImportantThis is available on firmware 2.20.0 or later.

The torque limit frame can be received from 3 different data sets. If more than one are received they are used with the following priority:

Emtron CAN Torque Limit (ID 1428).
Advanced Rx Data Set 1
Pre-defined Rx Set 1 v0.1 - Message 5 (ID 1428).

InfoThis is an Absolute Engine Torque Limit Request. Eg: If 350.0Nm is requested the Torque Limiting function will target 350.0Nm from the engine.

The frame contains 2 torque limits, the lowest one will be applied (assuming it’s the lowest of all other active torque limits).

CAN Rx ID: 1428 (0x594)

Signal	Start Bit	Length	Factor	Offset	Note
CAN Torque Limit 1 (NM)	0	16	0.1	-500	Absolute engine torque limit. -500 = Off.
CAN Torque Limit 2 (NM)	16	16	0.1	-500	Absolute engine torque limit. -500 = Off.
CAN Torque Limit 1 Strat Select	32	4	1	0	Selects the torque limit strategy used to apply the torque limit.
CAN Torque Limit 2 Strat Select	36	4	1	0	Selects the torque limit strategy used to apply the torque limit.
CAN Torque Limit 1 User Mode	40	4	1	0	Can be used to span a table axis. Values of 0-15.
CAN Torque Limit 2 User Mode	44	4	1	0	Can be used to span a table axis. Values of 0-15.
CAN Torque Loss	48	10	1	0	Applies a reduction to the ECU’s Uncorrected Torque calculation. Can be used to account for drive train losses. Should always be 0 unless you have very good reason to change it!

Note: All data is Unsigned, Little Endian (LSB First) format.

Example

Example CAN Channel Setup:

Received raw data can be viewed in the F3 window on the CAN Tab.

Final CAN Torque limit result is shown here:

The CAN Torque Limit User Mode 1 & 2 values are available to be used anywhere in the ECU as table axis’ or inputs to user functions.

To use the incoming torque limit, you must setup a User Torque Limit. This allows the tuner to decide how they want the ECU to act on the incoming torque limit request.

To use the CAN Torque Limit Strat Select value, set the Strat Mode to CAN Tq Request, otherwise you can force a Strat of your choosing.

InfoIf the CAN Torque Limit Strat Select value is zero and The User Torque Limit Strat Mode is set to CAN Tq Strat Request, no limit will be applied.

Setup the Torque Limit’s Main Table to utilize the CAN Rx Torque Limit value. You can also use the CAN Torque Limit User Modes like in the example below.

Here you can see the incoming request for is being modified for User Modes above 0:

EML-4 CAN Setup

EML-4 Setup.

Up the 3x EML-4 may be connected to the Emtron CAN bus. This allows the lambda data for up to 12 cylinders to be connected to the ECU. With the addition of every EML-4 module the CAN address for each data packet MUST use sequential addressing. The preferred addresses are listed below.

EML-4
- CAN Data Address = 65
- CAN Status Address = 66
EML-4
- CAN Data Address = 67
- CAN Status Address = 68
EML-4
- CAN Data Address = 69
- CAN Status Address = 70

ECU Setup.

ECU CAN Setup

Select an available CAN node, CAN1 or CAN 2
Select Baud Rate to 1Mbps
Turn the selected CAN channel ON
Select DATA Set = EML-4 (option 14)
Select CAN Address = 65 (On a single installation this address MUST match the EML-4 CAN Data address. With multiply EML-4 modules connected to the BUS use the lowest address. The ECU CAN protocol in the mode uses sequential addressing and expects the received CAN address to get larger.

NOTE: All other CAN settings are not used.

ECU Input Setup

The Software allows each EML-4 sensor channel to be assigned to a cylinder.

Select Input -> Input Pins Setup. Select the Lambda Cyls Tab
Select the Lambda Cyl you want to config.
Select the correct CAN Lambda Channel .In this example Cylinder 1 has been allocated to the LA 1 channel on the first EML-4 module.
The 1st EML-4 assigns LA1-4, the 2nd EML-4 assigns LA 5-8, the 3rd EML-4 LA 9-12.

Select Predefined Calibration to Lambda NTK EML-4. Don’t select Custom. Select Clamp Lo and Clamp Hi if required.

The Fault Settings are not used from this form, as this operation if performed internally by the EML-4 are transferred to the ECU over CAN.
The Engine Limit Table is still used.

Emtron 8 Way Keypad

Configure Emtron CAN as follows to use Emtron 8 Way Keypad

Set CAN Baud Rate to 1Mbps

Config -> Communications -> CAN Bus 1/2 -> CAN Bus 1/2 Setup

Set CAN Channel Settings as follows :

Config -> Communications -> CAN Bus 1/2 - Channel 1-6 -     40 : Emtron 8 - way Keypad

Configure the Keypad behavior as follows :

Config -> Communications -> Emtron CAN Devices -> Emtron Keypad

Keypad button behavior has multiple modes of configuration

0: Toggle (2 Position)

1: Sequential (3 Position)

2: Sequential (4 Position)

3: Binary (8 Position)

4: Momentary

Keypad Button1 Mode

Toggle: x2 Position

OFF - No LED

ON - Green LED

Sequential: x3 Positions

OFF - No LED

Position 1 - Green LED

Position 2 - Orange LED

Sequential: x4 Positions

OFF - No LED

Position 1 - Green LED

Position 2 - Orange LED

Position 3 - Red LED

Binary: x8 Positions

OFF - No LED

Position 1 - Green LED

Position 2 - Orange LED

Position 3 - Green & Orange LED

Position 4 - Red LED

Position 5 - Red & Green LED

Position 6 - Red & OrangeLED

Position 7 - Red & Green & Orange LED

Momentary: Green light ON while button is pressed

Assign Keypad inputs as follows :

Config -> Channels -> Input Setup ->

** When using Keypad input in multiple positions (sequential or binary), the keypad position runtime can be used in tables as in above example

Emtron EIC10 Setup

EIC10 ANV1-10 Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the Analog Channels 1 -10 are transmitted from the EIC10 device.

Applied to ALL connected EIC10 devices

EIC10 Frequency Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the Frequency data are transmitted from the EIC10 device.

Applied to ALL connected EIC10 devices

EIC10 #1 ANV7-10/Freq1-4 Pullup

0: OFF

1: ON

Enables 1k Pullup to 8.0V

EIC10 #1 Frequency 1-4 Edge

0: OFF

1: Falling

2: Rising

EIC10 #2 ANV7-10/Freq1-4 Pullup

0: OFF

1: ON

Enables 1k Pullup to 8.0V

EIC10 #2 Frequency 1-4 Edge

0: OFF

1: Falling

2: Rising

Emtron EIC16M Setup

EIC16M #1 ANV1-12 Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the Analog Channels 1 -12 are transmitted from the EIC16 device.

Applied to ALL connected EIC16 devices

EIC16M #1 ANV13-16 Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the Analog Channels 13 -16 are transmitted from the EIC16 device.

Applied to ALL connected EIC16 devices

EIC16M #1 Frequency Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the Frequency data are transmitted from the EIC16 device.

Applied to ALL connected EIC16 devices

EIC16M #1 ANV9-12 Pullup

0: OFF

1: ON

Enables 1k Pullup to 5.0V

EIC16M #1 Freq 1-4 Pullup

0: OFF

1: ON

Enables 1k Pullup to 8.0V

EIC16M #1 Frequency 1-4 Edge

0: OFF

1: Falling

2: Rising

Emtron ETC4 Setup

ETC4 CAN Data Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the EGT Channels are transmitted from the ETC device.

Applied to ALL connected ETC devices

ETC4 Fault Value

Controls the EGT value when the Input is in Fault or Open Circuit

Applied to ALL connected ETC devices

Emtron ETC8M Setup

ETC8M CAN Data Tx Rate

0: 200 Hz (default)

1: 50 Hz

2: 100 Hz

3: 500 Hz

Controls the rate the EGT Channels are transmitted from the ETC device.

Applied to ALL connected ETC devices

ETC8M Fault Value

Controls the EGT value when the Input is in Fault or Open Circuit

Applied to ALL connected ETC devices

Emtron Lambda to CAN (ELC/ELCM) Setup

For details :

Emtron Lambda CAN Manual

Click the link below to download or visit Emtron www Downloads

ELC

Reset CAN IDs to Default

0: OFF

1: ON

This will reset the ELC CAN IDs back to their default values

Channel 1 = 671, Channel 2 = 672

Set back to zero when finished.

Enable Heater Override

0: OFF

1: ON

When enabled, the ECU controls when the Lambda heater is ON or OFF. This is done through the “ELC HEater RPM Lockout” and “ELC Heater Post Start Lockout: settings.

When disable the ELC controls the heater(s) which will turn On 15 secs after the device power up.

Enable EMAP

0: OFF

1: ON

When enabled, the ECU will send EMAP data to the ELC. This units should be in kPa

** When enabled please make sure the EMAP is configured correctly inside the ECU.

ELC Heater RPM Lockout

RPM Below which heater will be locked out

ELC Heater Post Start Lockout

Timer before which heater will turned on Post Start up

ELC Lambda 1 Test Enable

Forces the ELC to send this Test Value over the CAN bus.

Allows the user to confirm the ECU calibration is setup correctly.

0 = OFF

ELC Lambda 2 Test Enable

Forces the ELC to send this Test Value over the CAN bus.

Allows the user to confirm the ECU calibration is setup correctly.

0 = OFF

Generic Dash Configuration

Configure Emtron CAN as follows to send Pre-Defined Data set for most Dash Systems

*** Emtron has provided Pre-Defined Data set to most dash manufacturers to match these settings

Set CAN Baud Rate to 1Mbps

Config -> Communications -> CAN Bus 1/2 -> CAN Bus 1/2 Setup

Set a CAN Channel Setting as follows :

Config -> Communications -> CAN Bus 1/2 - Channel 1-6

Parameter Scaling

ALL data/parameters transmitted from the ECU over CAN have units defined by the corresponding parameter calibration table(s). This can be setup and adjusted through the PC tuning software Emtune.

All Data is unsigned
All Data is 16 bits
Low byte of each word (16bit) is transmitted first.

Examples:

Temperature in degrees Celsius or Fahrenheit
Pressure in kPa, PSI, InHg
Speed in Kph, mph, m/s
- Speed in Kph, mph, m/s

Type	Units	Min Value	Max Value	Conversion Raw to Displayed Value
Position	%Posn	-100.0 %	100.0 %	Display = ECU value x 0.1 - 100 OR ECU value A: 0000 becomes -100.0 % ECU value B: 2000 becomes 100.0 %
Pressure	kPa/PSI	0.0	6500.0	Display = ECU value x 0.1 OR ECU value A: 0 becomes 0.0 kPa/PSI ECU value B: 1000 becomes 100.0 kPa/PSI
Temperature	oC / oF	-50.0	250.0	Display = ECU value x 0.1 - 50 OR ECU value A: 0 becomes -50.0 oC/ oF ECU value B: 1500 becomes 100.0 oC / oF
Lambda	La	0.000	2.000	Display = ECU value x 0.001 OR ECU value A 0 becomes 0.000 La ECU value B 1000 becomes 1.000 La

Type	Units	Min Value	Max Value	Conversion Raw to Displayed Value
Speed	Kph/mph	0.0	6500.0	Display = ECU value x 0.1 OR ECU value A 0 becomes 0.0 kph ECU value B 1000 becomes 100.0 kph
Ignition Angle	oBTDC	-100.0 oBTDC	100.0 oBTDC	Display = ECU value x 0.1 - 100 OR ECU value A 1000 becomes 0.0 oBTDC ECU value B 2000 becomes 100.0 oBTDC
Voltage	V	0.000	20.000	Display = ECU value x 0.001 OR ECU value A 0 becomes 0.000V ECU value B 20000 becomes 20.000V
Percentage1	%	0.0	100.0	Display = ECU value x 0.1 OR ECU value A 0 becomes 0.0% ECU value B 1000 becomes 100.0%
Percentage2	%	-100.00	100.00	Display = ECU value x 0.01 - 100 OR ECU value A 0 becomes -100.00% ECU value B 10000 becomes 0.00% ECU value C 20000 becomes +100.00%

Type	Units	Min Value	Max Value	Conversion Raw to Displayed Value
Rate of Change1	%/sec	-100.0	+ 100.0	Display = ECU value x 0.1 - 100 OR ECU value A 0 becomes -100.0 %/sec ECU value B 1000 becomes 0.0 %/sec Or ECU value B 2000 becomes +100.0 %/sec
Rate of Change2	rpm/sec	-20000	20000	Display = ECU value x - 20000 OR ECU value A 0 becomes - 20000 rpm/sec ECU value B 20000 becomes 0 rpm /sec Or ECU value B 40000 becomes + 20000 %/sec
G-Force	G	-10.00 G	10.00 G	Display = ECU value x 0.01 - 10 OR ECU value A 0 becomes -10.00 G ECU value B 1000 becomes 0.00 G or ECU value B 2000 becomes 10.00 G
RPM	RPM	0	300000	Display = ECU value x 1 OR ECU value A 0 becomes 0 RPM ECU value B 20000 becomes 20000 RPM
Pressure Diff	kPa/PSI	0.0	6500.0	Display = ECU value x 0.1 - 1000 OR ECU value A: 10000 becomes 0.0 kPa/PSI ECU value B: 8000 becomes - 200.0 kPa/PSI
Counter		0	65535	Display = ECU value OR ECU value A 0 becomes 0 ECU value B 10 becomes 10

VVT Position	Deg	-100.0	+100.0	Display = ECU value x 0.1 - 200 OR ECU value A: 2000 becomes 0.0 Deg ECU value B: 2304 becomes 30.4 Deg (Cam Advanced) ECU value 3: 1871 becomes -12.9. Deg (Cam Retarded)

Pre-defined Rx Set 1

This data set allows a huge range of parameters to be read from the CAN bus and used by the ECU.

The DBC file is available at [emnet.emtronaustralia.com.au](https://emnet.emtronaustralia.com.au/ “target="_blank”")

The data is received sequentially from ID 1424 to 1433.

Message 5 (ID 1428) includes the Emtron CAN Torque Limit Rx frame. It is received as part of this data set with the lowest priority.

Raw data received is displayed in the F3 window on the CAN Tab.

To use the data you must set the relevant input channel’s source to “CAN Predef Rx 1/Custom Rx1”.

Example: Wheel Speed Channels:

Example: Gear Detection:

Pre-defined Transmit Set 1

All 16 bit values have low byte transmitted first by the ECU. Sequential addressing is used. All parameters are transferred in the units defined inside the ECU. These can be rescaled if required by the receiving device.

Custom Packet 1 contains 10 Message Objects each with a different sequential address. This can be selected on CAN1 or CAN2 and on any of the 6 channels within that CAN node. In total the Custom Packet 1 transmits 40 parameters on one CAN Channel.

NOTE: If all 6 channels were used within one CAN node a total of 240 parameter could be transmitted