Protocol analysis
R&S
®
RTO6
632User Manual 1801.6687.02 ─ 05
Payload Trailer
Cycle
count
Header
CRC
Pay-
load
length
Frame ID
Reserved bit
Payload preamble
Null frame
Synch frame
Startup frame
Indicators
5 bits
"Payload pre-
amble"
Indicates a Network Management Vector in the payload segment.
The NMV allows the host processor to send data directly, without pro-
cessing by the communication controller
.
"Null frame"
Indicates a frame without usable data.
"Sync frame"
Indicates that the frame is used for synchronization of the FlexRay
system. Only sync nodes can send this frame type.
"Startup frame"
Indicates a startup frame used for startup of the network. Only spe-
cific start nodes can send this frame type.
Remote command:
SEARch:
TRIGger:FLXRay:
PLPReamble on page 1890
SEARch:TRIGger:FLXRay:NUFRame on page 1890
SEARch:TRIGger:FLXRay:SYFRame on page 1892
SEARch:TRIGger:FLXRay:STFRame on page 1891
Frame ID (min/max)
The frame ID contains the number of the slot in which the frame is transmitted. Each
frame ID occurs only once during a FlexRay cycle.
The setup conditions are the same as in the FlexRay trigger setup, see "Frame ID
(min/max)" on page 626.
Remote command:
SEARch:TRIGger:FLXRay:FCONdition on page 1889
SEARch:TRIGger:FLXRay:FMIN on page 1889
SEARch:TRIGger:FLXRay:FMAX on page 1889
Payload length (min/max)
The payload length contains the number of words transmitted in the payload segment.
Information is transmitted in 2-byte words, so the number of data bytes in the payload
segment is twice the payload length.
The setup conditions are the same as in the FlexRay trigger setup, see "Payload
length (min/max)" on page 626.
Remote command:
SEARch:TRIGger:FLXRay:PCONdition on page 1890
SEARch:TRIGger:FLXRay:PMIN on page 1891
SEARch:TRIGger:FLXRay:PMAX on page 1891
Cycle count (min, max), Step
The cycle count contains the number of the current FlexRay cycle.
FlexRay (option R&S RT
O6-K520)
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