MoTeC ADL EDL - Manual (Page 21)

MoTeC Overview 19
Communications Overview
The ADL has two communications ports which are used to communicate with
other devices.
RS232 Communications Port
The RS232 communications port can be connected to an ECU or similar
device and to a Radio Telemetry device. A MoTeC telemetry kit is available
which provides high quality data transmission and flexible data display.
• Note that when connected to both an ECU via RS232 and to a Telemetry
device, the baud rates of the two devices must be the same (usually 9600
or 19200 baud).
CAN Communications Port
The CAN (Control Area Network) communications port can be connected to
other devices with a compatible CAN port. The advantage of CAN is that
many devices can be connected to the CAN bus at once, which allows all
connected devices to communicate with each other, also the CAN port
communicates at very at high speed.
Other MoTeC products that use CAN for intercommunication include the
M800, BR2, PLM and MDD.
Note that these communicate at 1Mbit/sec, so any other devices connected
on the CAN bus must also communicate at 1Mbit/sec.
The CAN communications port is also used for all PC communications,
including configuration of the ADL and unloading the logged data.
ECU Connection
The ADL can be connected to most Engine Management Systems (ECUs).
This avoids duplication of sensors and allows the ADL to display and log
many ECU parameters.
The ECU may send up to 40 values to the ADL. The update rate of these
values depends on how many values are transmitted, the communications
baud rate and if sent using CAN or RS232. For RS232 the typical update rate
is about 20 times per second and for CAN it is about 50 times per second.
Note that logging the ECU values faster than these rates is unnecessary and
will reduce the total logging time.