User manual

MEX ASPERA-3
Ref.:
ME-ASP-MA-0002
Issue:
Issue 1 Rev. 4
Date:
15/2/2002
Page:
Page 45 of 58
ASPERA-3 EGSE User Manual
IFSI
CNR
The RPRO CCS protocol [RD1] is formed by a number of fixed length field (ASCII and bynary),
possibly followed by a variable length string preeceded by a binary field L(b4) indicating the number of
characters in the string.
In order to communicate with CCS, the user must provide the command acronym (first column of the
table above) followed by (only) the requested parameters strings separated by spaces or tabs (no spaces
are allowed inside a single parameter string). Binary fields are provided as a string of numeric
characters. Field L(b4) indicating the length of the following variable length string is computed at
transmission time and must not be supplied.
As an example in order to request timely telemetry packets for APID 980 and 981 issue the following
command which has only one variable length parameter string:
TM-D_SPECIF_OND mode=T,980,981
As shown on the figure on SCOE Interface, APID can be splinted as PID+CAT so that the above
command can be written as:
TM-D_SPECIF_OND mode=T,61+4,61+5
3.2.4 Commands sequence
See paragraph 3.1.3.5