General Dynamics 7200 - 6.2 Axis Reversed; 6.3 Axis Runaway; 7.0 Position Loop Errors

7200 TROUBLESHOOTING
E - 15
6.2 Axis Reversed
An Axis reversed error may be caused by the following conditions:
1. At installation time, the motor phasing was reversed -- check the phasing and
correct if necessary.
2. A sudden slew from one direction to the other could be caused by a low
setting of the Immobile/reversed timeout [ms] -- reset the parameter.
3. Miswired encoders -- check the wiring on the encoders.
6.3 Axis Runaway
If an Axis runaway error is displayed at the ACU, check the following conditions:
1. Runaway angle is set too tight -- reset the parameter.
2. Encoder failure (typically cable failure or ground loop) -- check for both
conditions.
3. RDC failure -- check and replace if necessary.
4. Drive cabinet interface cable failure -- check the cable and replace if necessary.
5. I/O board failure -- output is "stuck on". Check the board, and replace if
necessary.
7.0 Position Loop Errors
7.1 Overshooting (Motor Turning On and Off Repeatedly)
NOTE: For flyaway/small antennas only: decrease Positioning
deadband [deg] in the Position loop parameters... menu.
If the motor is turning on and off repeatedly, decrease tracking speed until the
overshooting ceases.