| Elevation soft limits |
Automatic software override brings antenna to a gentle stop at the specified
limits. |
| Elevation shutdown limits: |
Antenna is placed in shutdown state if the upper or lower limit is
exceeded. |
| Elevation limit switch inputs |
EL Hi/Low TTL or switch closure. Antenna is placed in a shutdown state if a limit
switch is encountered. |
| Tachometer check watchdog |
The calibrated tachometer is compared to the differenced position for
consistency. Shutdown is invoked if the check fails. Protects against loss of tach or
position sensors. |
| Antenna response watchdog |
Based on an internal model of the antenna inertia and damping moments, the
response of the antenna to drive output requests is checked for consistency. Shutdown
is invoked if the check fails. This protects the antenna from a jammed or broken gear,
or if equipment such as a scaffold is inadvertently hit by the antenna. |
| Antenna max. speed watchdog |
Shutdown is invoked if the specified maximum speed of the antenna is
exceeded. |
| Antenna max. acceleration limit |
Based on the internal antenna model, this check limits the drive output to stay
within a specified acceleration limit. |
