MoTeC ADL EDL - Manual (Page 10)

8 Overview
Power
The ADL power can be turned off at any time without losing the logged data.
The ADL uses FLASH memory which does not require an internal battery to
keep it alive.
Logging Rate
The ADL can store any value at up to 1000 times per second, which can be
individually set for each logged item.
The rate at which the values are logged is very important – the value must be
logged fast enough to record all variations in the reading. If the value is
logged too slowly then the readings can be totally meaningless. For example
suspension position normally needs to be logged at 100 times per second or
more.
Note, however, that if a value is logged faster than necessary it will not
improve the accuracy of the logged data, it will just reduce the total logging
time available. For example, the engine temperature only needs to be logged
at once per second.
Update Rate
Not all values are updated 1000 times per second, and logging them faster
than their update rate will simply waste memory.
The update rates for all input types are listed below:
Input Type Update Rate
(times per second)
Analog Voltage Inputs 1 to 4 & 11 to 14 1000
Other Analog Voltage Inputs 500
Analog Temp Inputs 500
Lambda Inputs 100
Digital Inputs & Speed Inputs 100
RS232 & CAN Communications 50 max *
* Note that the RS232 & CAN Communications update depends on how
frequently the data is sent from the device. Typically the update rate from an
M4, M48, M8 or M800 ECU is about 20 times per second using RS232, and
about 50 times per second for the M800 using CAN.