Rockwell Automation GMLC Reference Manual - Manual (Page 599)

Publication GMLC-5.2 - November 1999
562 Fault Variables
In the Tag Explorer select General System Variables, then select
System_bus_over_voltage_flt_1394 in the Tag Window.
System Bus Under Voltage Fault 1394
If at any time the drive bus falls below 275V, the
sysem_bus_undr_voltage_flt_1394 activates.
System_bus_undr_undr_voltage_flt_1394 is a logical (Boolean) variable,
with a value of:
• 1 (true) if the drive bus falls below 275V at any time, and
• 0 (false) if not.
When System_bus_under_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.
In the Tag Explorer select General System Variables, then select
System_bus_under_voltage_flt_1394 in the Tag Window.
!
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.