blue PiraT2 / 5E / 5E
User Guide
Datum: 21.09.2016
Seite 44 von 71
blue_PiraT2_UserManual_V2.4.1.doc
The data logger is not an active part of the bus system because it is working in a spy mode. The
device is able to log messages immediately after wake up.
Before the logging data are saved on the internal memory, they are buffered in a ring buffer. In
the case of a data rate peak, which exceeds the storage rate of the internal memory, storage of
data is still possible.
If the MOST150 data rate is permanent higher than the maximum storage rate, the data logger
will stepwise deactivate channels: first the MEP and MDP channel, then the control channel and
at last the status messages.
To ensure logging of maximum continuous data blocks a hysteresis is implemented. Before log-
ging MEP and MDP messages again, the ring buffer data has to be fully stored on the hard disk.
Before starting the logging of the MEP and MDP
messages again the system sends a “Lost
Message”. This message contains information about how many messages of which type were
rejected.
10.8 ECL
Currently the ECL (Electrical Control Line) is only supported in conjunction with MOST150. In
general, the ECL is a slow LIN bus. The following ECL messages will be recorded:
EWU (Electrical Wake-Up)
STWU (System Test Wake-Up)
STP (System Test Parameters)
STR (System Test Results)
Undefined Pulse
