8.6 Faults and Tracking

There are different faults which could occur during operation. Please also refer to chapter Operation . Below is a collection of all this faults.

There are the following cases for a fault of one axis. 'TIMEOUT' and 'FAULT' are releasable during a tracking cycle. A 'STOPPED' fault have to be released with the RESET button:

• Jump Values of angle encoder; 5° in azimuth and elevation or 10° in polarisation ('STOPPED')
• Antenna moves 5sec into the wrong position ('STOPPED')
• Motor timeout occur because of no antenna movement within the entered time ('TIMEOUT')
• Motor fault input triggered for example from frequency converter ('FAULT')

There are the following cases for a 'STOPPED' fault of all axes together, which have to be released with the RESET button:

• Trigger emergency stop input
• Click the STOP button on the web interface

All faults are released by clicking the RESET button on the web interface or by sending the remote command mrst=0. The RESET button activates the 'MOTOR RESET' outputs of all three axes for a quarter second and delete the fault flags. All target angles are set to the actual value to suppress an immediate movement of the antenna.

If a 'TIMEOUT' or 'FAULT' occur during a tracking cycle in one axis and the cycle is canceled, the ACU will retry after 2min again according to the setting of 'Retry after motor fault' (NEVER/ONCE/FOREVER). The retry is a RESET which activates the 'MOTOR RESET' outputs of all three axes for a quarter second and delete the fault flags. All target angles are set to the actual value to suppress an immediate movement of the antenna. This is also valid for tracking faults like a 'PEAKING FAULT'.

If a fault stay active in one axis and don't disappear during a RESET, the tracking stops the operation. For example if the polarisation have a fault, azimuth and elevation stop the tracking operation.