Rockwell Automation GMLC Reference Manual - Manual (Page 598)

Publication GMLC-5.2 - November 1999
561
Important: Do not use an Equation block to clear this fault. The Reset
Fault block not only resets this variable to zero, it also resets
the Drive OK Relay inside the 1394 system module. This
relay must be reset before the System Bus can be reapplied.
In the Tag Explorer, select both Axis System Variables and the desired
physical axis, then select Axis_it_fault_1394 in the Tag Window.
System Bus Over Voltage Fault 1394
The System_bus_over_voltage_flt activates if drive bus reaches 810V.
This fault can be caused by exceeding the shunt regulator duty cycle.
System_bus_over_voltage_flt_1394 is a logical (Boolean) variable, with
a value of:
• 1 (true) if the drive bus reaches 810V, and
• 0 (false) if not.
This fault can be caused by exceeding the shunt regulator duty cycle.
When System_bus_over_voltage_flt_1394 = 1,
System_module_hard_fault_1394 = 1, and Drive_hard_fault_1394 = 1.
Clearing this fault clears Drive_hard_fault_1394.
Clear this fault with a Reset Fault block, set to Reset 1394.
Important: Do not use an Equation block to clear this fault. The Reset
Fault block not only resets this variable to zero, it also resets
the Drive OK Relay inside the 1394 system module. This
relay must be reset before the System Bus can be reapplied.
!
ATTENTION: A hard fault is a serious condition! Be
certain to correct the underlying cause of this fault,
before clearing the fault and reactivating the drive.