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4. CONTROL OF VIX DRIVES 67
Fault Status Reporting
Faults are classified into two groups:
Drive Faults DF (hardware faults present in the drive)
or
User Faults UF (user program faults)
Drive Faults
Hardware drive faults will cause the drive output stage to be turned OFF (de-energised).
This will cause the Drive LED to turn RED. Once the fault has been corrected the drive may
be re-energised using the ON command.
When read, DF reports a 32-bit double word pattern of the form:
*0000_0000_0000_---32 bit wide double word---_0000
1458 32Bit No.
Where a bit is set (displayed as a 1) its bit number can be determined and compared with
the bit number value given in Table 4-6 to determine the Drive Fault being reported.
Use the Read command to display the DF word pattern, that is ‘aR(DF)’.