Research Concepts RC2000C - Manual (Page 94)

86 RC2000C Az/El Tracking Antenna Controller Appendix E Communications Protocol
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bytes 30-31: These bytes are used to encode the alarm code. The alarm code (a byte
value) specifies the alarm condition that is presently active. See the table
below for the various alarm codes.
byte 30: least significant nibble of alarm status - binary data
7 6 5 4 3 2 1 0
0 0 1 0 $ _ _ _ _
least significant nibble
a a a a of the alarm code
3 2 1 0
byte 31: most significant nibble of alarm status - binary data
7 6 5 4 3 2 1 0
0 0 1 0 $ _ _ _ _
most significant nibble
a a a a of the alarm code
7 6 5 4
Alarm codes - See the system error codes in chapter 6 of the RC2000A manual.
a a a a $ a a a a
7 6 5 4 3 2 1 0
- - - - - - - -
0 0 0 0 0 0 0 0 0 - no alarm active
0 0 0 0 0 0 0 1 1 - low battery alarm
0 0 0 0 0 0 1 0 2 - azimuth alarm
0 0 0 0 0 0 1 1 3 - elevation alarm
0 0 0 0 0 1 0 0 4 - azim count alarm
0 0 0 0 0 1 0 1 5 - elev count alarm
0 0 0 0 0 1 1 0 6 - azim limit corrupt alarm
0 0 0 0 0 1 1 1 7 - elev limit corrupt alarm
0 0 0 0 1 0 0 0 8 - autopol data alarm
0 0 0 0 1 0 0 1 9 - simultaneous az/el alarm
0 0 0 0 1 0 1 0 10 - azim slow speed alarm
0 0 0 0 1 0 1 1 11 - elev slow speed alarm
0 0 0 0 1 1 0 0 12 - comm port data alarm
0 0 0 0 1 1 0 1 13 - geo elev position alarm
0 0 0 0 1 1 1 0 14 - track config data alarm
0 0 0 0 1 1 1 1 15 - antenna/receiver alarm
0 0 0 1 0 0 0 0 16 - time or data alarm
0 0 0 1 0 0 0 1 17 - az/el ang display alarm
0 0 0 1 0 0 1 0 18 - pol options alarm
0 0 0 1 0 0 1 1 19 - polarization alarm
0 0 0 1 0 1 0 0 20 - az/el options alarm
byte 32: This byte gives information that allows the user to determine the exact value of
the controller's internal polarization position representation. This may be used
with the auto$move command to position the polarization control device at a
specific value.
The RC2000 currently supports two polarization control devices, a Polarotor and a rotating feed
with potentiometer position sense feedback.