Using the remote ECU Data Logger 

The data logger must be configured with the C-ComWP that will be used to extract the logged data. This is to ensure the correct relationship between the logged ECU raw data and the C-Com dashboard used to configure the logged sensors. The data logger will use the exact logging parameters as programmed into C-ComWP for online logging. If you change any of C-Com’s logging parameters or dashboard, you must also re-configure the data logger or unpredictable results will occur when scaling raw data downloaded from the logger.

Arming

Switch the ARM wire to a ground potential. The ECU must be connected to the logger with the link cable. The Green LED will blink rapidly. If the Red LED illuminates, an error occurred while the logger was communicating with the ECU. While the logger is armed or logging, communication is only possible between the logger and the ECU. To download logged data or to configure the logger’s logging parameters, the logger must be in the idle state (unarmed). Caution: Re-arming the data logger will erase any stored data in its memory.

Triggering

Switch the TRIGGER wire to a ground potential. The Red LED will begin to blink slowly while the Auto-Trig sensor is being polled. Triggering cannot occur until the logger is armed. It may be desirable to leave the TRIGGER wire grounded and only use the Auto-Trig mode. If an Auto-Trig sensor is programmed, this sensor will be immediately polled and evaluated against the Auto-Trig threshold. When the programmed threshold is exceeded, logging will begin and continue for the programmed number of frames regardless of ARM or TRIGGER status. If an Auto-Trig sensor is not programmed (set to none), logging will commence immediately after the TRIGGER is asserted.  While logging is in progress, The Green and Red LEDs will blink quickly in an alternating pattern.  If power is lost while logging, the successfully logged (valid) data will remain and can be downloaded.

Wiring

RED: +12VDC

BLACK: GROUND

VIOLET: ARMING (Switch to ground)

BLUE: TRIGGER (Switch to ground)

 

LED Indicators

 

GREEN LED

RED LED

ON

IDLE / NO DATA

ERROR

OFF

UNPOWERED

  

SLOW FLASH

DATA AVAILABLE

TRIGGERED / AUTO-TRIG

FAST FLASH

ARMED

LOGGING

 

Configuring the Data Logger

Because the Data Logger has no built-in knowledge of any of the ECU’s calibration parameters, it must be programmed into the logger through the logger configuration utility of C-Com WP.  In order for certain sensors to be scaled properly, the logger needs to know what size MAP sensor is used, the injector flow rate, number of cylinders, table cell width, etc.  It is equally important that the logger is configured for whatever dash is currently configured in C-Com WP; unpredictable results may occur otherwise.  Configuration of the Data Logger needs to occur only once or whenever C-Com WP’s logging parameters are changed.

To ensure proper logging and accurate readings,  either go online with the ECU to be logged -or-  load the current calibration into C-Com WP offline before configuring the Data Logger from C-Com WP.

The Data Logger is an extension of the logging features of C-Com WP and must be used in tandem with C-Com WP.  If any of the logging parameters are changed in C-Com WP,  the Data Logger must be reconfigured before its next use.

Installation of the Data Logger

Connect the red wire to a 12 volt source.  Connect the black wire to ground.  To utilize the “arm” feature, connect the violet wire to a switched ground.  To utilize the “trigger” feature, connect the blue wire to a switched ground.  The arm and trigger wires may be connected together and then switched to ground to arm and trigger simultaneously.  Alternatively, the trigger wire may be permanently connected to ground if the hardware trigger function is not needed.  If no auto-trig sensor is selected in C-ComWP, logging will commence immediately upon the trigger wire being switched to ground (If armed).  If an auto-trig sensor is selected, the sensor will be polled immediately upon the trigger wire being switched to ground, but logging will not begin until the conditions for auto-triggering are met.

The data logger may be left installed in the car or it may be removed from the car and operated with a 9V battery for data retrieval.

 

ECU Data Logger Tutorial

-          Configuration

o   Execute C-ComWP

o   Go online with the ECU to be logged or Load the current calibration file for the ECU to be logged offline (this synchronizes C-ComWP with ECU and sensor configuration)

o   Make certain all the data logging parameters for C-ComWP are correct for your intended logging session

o   Make certain C-ComWP is offline and communication cable is connected to logger

o   From the Logging menu, select Send Log Config to Data Logger (any unsaved data in logger will be erased)

 

-          Initiating a Log

o   Make certain logger is connected to ECU with the logger jumper cable

o   Switch the Arm wire to ground (this erases any log currently in memory).  Logger is on standby and waiting for Trig signal to be switched to ground

o   Switch the Trig wire to ground (this causes the logger to poll the ECU for the value of the auto-trig sensor (if programmed) and tests it against the programmed auto-trig sensor threshold).  If an auto-trig sensor is not programmed, logging will commence immediately. Otherwise, logging will not begin until the trigger threshold is crossed (The Trig wire may be left permanently connected to ground or switched with the Arm signal if hardware triggering is not desired)

 

-          Reading Data from ECU Data Logger

o   Make certain logger is unarmed and powered on

o   Connect logger to communication cable and from C-ComWP’s Logging menu, select Read Data Logger

 

Frequently Asked Questions

-   Do I need to re-configure data logger every time I log?

o   No.  Only when the data logging parameters are changed in C-ComWP or the first time the data logger is used.  The configuration is stored in non-volatile memory in the logger.

 

-   For how much time can I log with the logger?

o   This depends on many factors.   Typically, a 14 sensor dash can be logged for 2000 frames (10 frames per second = 3.3 minutes). An 8 sensor dash can be logged for 3200 frames(10 frames per second = 5.3 minutes).

 

-   How long will data stay in logger memory when not powered?

o   Data retention of the non-volatile memory in the logger is specified by the manufacturer to be 10 years.

 

-   Should I erase the data logger’s memory after reading the data?

o   This is up to the user.  Once it is erased from the logger, it can no longer be extracted.  In any event, the data logger memory will be erased the next time it is armed, so it is not mandatory to erase the logger after it is read.

 

Troubleshooting

-          Communication Errors

o   Is the communication cable connected to the Data Logger?

o   Is C-Com WP offline from the ECU?

o   Is the Data Logger unarmed?

o   Is the Data Logger powered on?

 

-          Red light illuminates when arming

o   Is the data Logger connected to the ECU with the jumper cable?

o   Is the ECU powered?

 

-          Will not log

o   Is the Data Logger trigger wire properly grounded?

o   Is the Data Logger configured for auto-triggering with valid sensor parameters?

 

-          Logged data is corrupt

o   Was the Data Logger properly configured from C-Com WP?

o   Have any of the data logging parameters of C-Com WP changed without re-configuring the data logger? 

 

-          Logged data is improperly scaled

o   Was the Data Logger properly configured from C-Com WP?

     Was a valid calibration file loaded into C-Com WP prior to the data logger’s configuration?