Research Concepts RC2500 - Manual (Page 67)

60 RC2500 Antenna Controller Chapter 7 Troubleshooting/Alarm Codes
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position at the A.I.U. This error may be reset only by moving the antenna away from the limit of the
offending axis. In the event that a limit is reached and the move key for that axis is held down for an
extended period, a jam error will occur. The jam will not be evident due to the higher priority of the
summary limit alarm. If this occurs, first reset the jammed error then, move the antenna away from the
limit. See Section 5.6. SUMMARY LIMIT is controlled by a current loop described in Sec. 3.3.2.
Interruption of this current loop by a broken connection or loop supply failure will also produce the error.
Refer to the controller specific appendices for details about this error in non-standard applications.
UP, DOWN, CW, CCW limits
For the ‘7134 Individual Limits’ firmware version, the arrival of the antenna at any of the six position limits
(AZ- CW/CCW, EL UP/DOWN, and POL- CW/CCW) will produce a Limit Display over the angular
readout for that axis. Antenna motion for the given axis and direction is not allowed. To clear the limit
and begin displaying the angular position, move the antenna away from the limit with the keypad in
manual mode. All axis limits are controlled by a current loops described in Sec. 3.3.2. Interruption of
these current loops by a broken connection or loop supply failure will also produce Limit displays. Refer to
the controller specific appendices for details about these errors in non-standard applications.
ANT AZIM, ANT ELEV, ANT POL
These alarm messages indicate that an error has been detected for the axis referenced in the alarm
message. When one of these alarms are detected, the axis is disabled. Go to RESET mode (section
5.6) to view the actual fault condition which was detected and to clear the fault.
AZIM SLOW SPEED, ELEV SLOW SPEED
The azimuth and elevation slow speed codes have been corrupted. The slow speed codes are entered
via the Azim and Elev Slow Speed CONFIG mode items. See Sections 5.8.6 and 3.4.3
COMM PORT
This error (caused by an incorrect checksum) indicates that the value of at least one of the following
CONFIG mode items has been corrupted: Remote Mode Enable, Comm Port Baud Rate, or Comm Port
Address. Remote Mode Enable is the controlling item for this group of CONFIG mode items - it must be
enabled to allow access to the Comm Port Baud Rate and Comm Port Address CONFIG mode items.
See section 5.8.3.
POL OPTIONS
This error (caused by an incorrect checksum) indicates that the value of at least one of the following
CONFIG mode items has been corrupted: Polarization Equipment Code. See sections 5.8.5 and 3.4.1.
AZ/EL OPTIONS
This error (caused by an incorrect checksum) indicates that the value of at least one of the following
CONFIG mode items has been corrupted: Az/El/Pol Drive Options Enable, Az/El Fast Slow Threshold,
Az/El Retry Attempts, Az/El Fast Deadband, Az/El Slow Deadband, Azim Coast Threshold, Elev Max
Position Error, or Simultaneous Az/El Enable. The Az/El Drive Options Enable CONFIG mode item is the
controlling item for most members of this group of CONFIG mode items - it must be enabled to allow
access to the other items. See sections 5.8.6 and 3.4.
TIME/DATE
This alarm code indicates either the Time or Date is corrupt. The time and date are entered via CONFIG
mode. See section 5.8.7.
ANT/RCVR CONFIG
This error codes indicates that at least one of the following CONFIG mode items is corrupt: AGC Polarity
Flag, AGC C Band Threshold, AGC K/L Band Threshold, Antenna Latitude, Antenna Longitude, Ant Size,
Azim Constant, or Elev Constant. See sections 5.8.8 and 5.8.9.