OPTIONAL
(as implemented in Quinta Software for safety
reasons):
This command set checks for the MU, which is in
MU list position 1 (resp. 0x00), whether voting for
this MU was really activated.
This is necessary because the prompt to the T4
command is merely the feedback from the CU
that the command has arrived at the CU, but
does not give any feedback as to whether the
command was correctly transmitted via radio
and arrived at the MU.
In concrete terms, this is implemented by directly
addressing the MU in unicast mode via the M
command and then using the ~X command for
polling the x message. The following x message
can now be used to check whether the voting for
the corresponding MU has been activated or
not; x messages are received by the CU at
regular intervals anyway, but with large
command groups it may be necessary to check
the x message immediately to prevent an
unnecessarily long response time. With this
command structure, the x message is usually
expected in less than 0.5 seconds.
Please note that you will never use the ~X
command without a previous M command,
which addresses a specific MU in unicast mode,
as this will cause major problems in the further
course of the log data.
After querying the x message of a specific MU,
you must switch back to broadcast mode using
the M 0 command.
The retrieved x message of the MU with the MU
ID 0x79B7 provides the following information:
As the unset bit 7 in the binary number
representation of the hexadecimal value 7C
shows, voting for the MU with MU ID 0x79B7 is
disabled. Thus, the expected target state was
successfully checked.
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