Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty - Manual (Page 121)

Troubleshooting the Drive 5-7
The drive indicates faults in the following ways:
• Inverter Status LED on the drive control panel (see section 5.2).
• Drive status parameters Drive Status 1 (209) and Drive Status 2 (210).
• Entries in the fault queue (see section 5.4.1).
• Pop-up screen on the LCD OIM. See figure 5.3. The screen displays:
• Fault number
• Fault name
• Time that has elapsed since fault occurred.
The fault screen is displayed until it is acknowledged by pressing any F-key or
cleared in the drive by other means.
5.4.1 About the Fault Queue
The drive automatically retains a history of faults that have occurred in the fault queue.
The fault queue is accessed using the OIM or VS Utilties software.
The fault queue holds the four most recent faults. The last fault to occur is indicated in
queue entry #1. As new faults are logged into the queue, existing fault entries are
shifted (for example, entry #1 will move to entry #2). Once the queue is full, older faults
are discarded from the queue as new faults occur.
All entries in the fault queue are retained if power is lost.
The Time Stamp
For each entry in the fault queue, the system also displays a fault code and time stamp
value. The time stamp value is the value of an internal drive-under-power timer at the
time of the fault. The value of this timer is copied to PowerUp Marker (242) when the
drive powers up. The fault queue time stamp can then be compared to the value in
PowerUp Marker to determine when the fault occurred relative to the last drive power
up.
The time stamp is cleared when the fault queue is cleared.
Figure 5.3 – Sample Fault Screen on the LCD OIM
Press any F Key to
Acknowledge the Fault
Fault Auto
ACKNOWLEDGE
- Fault - Fxxxxx
Fault Text String
Time Since Fault
xxxx:xx:xx