Rockwell Automation GMLC Reference Manual - Manual (Page 603)

Publication GMLC-5.2 - November 1999
566 Fault Variables
System Ground Fault 1394
A System_ground_fault_1394 occurs when the 1394 system module
detects that there is significant current flowing through the earth ground
connection to the drive. This usually results from improper installation of
the 1394 drive system.
System_ground_fault_1394 is a logical (Boolean) variable, with a value
of:
• 1 (true) if the 1394 system module detects that there is significant
current flowing through the earth ground connection to the drive, and
• 0 (false) if not.
This fault usually results from improper installation of the 1394 drive
system.
When System_ground_fault_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 program execution can be
resumed.
In the Tag Explorer select General System Variables, then select
System_ground_fault_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.