Time-Triggered Protocol (TTP/C) 113
– The concurrency control error records a violation of the non-blocking
write protocol [184].
• Time difference values: For every communication channel, the status area also
contains values denoting the difference between the expected arrival time and
the actual arrival time of the most recent received frame. Due to the reasonable-
ness condition of the global time-base [169, p. 52], this value must be between
−2Π and +2Π (where Π is the precision of the global time-base).
• Null frames and failed frames: Further diagnostic information consists of a
counter for the number of null frames and failed frames (i.e., invalid or incor-
rect) for each communication channel during the last TDMA round.
The third part of the ...