Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) - Manual (Page 202)

4-48 Commissioning
7000A-RM001A-EN-P – January 2011 7000 “A” Frame
There is also a Gating Test that fires the individual devices one at a
time, in what is described as a Z-pattern. Basically, for each section,
the Top Left device will turn on for 2 seconds, then turn off. The
next device to the right will turn on for 2 seconds, and the pattern
will continue. When you reach the end of the first stack of devices,
the right device in the middle stack down will fire and the pattern
continues right to left until the end of the middle stack is reached.
Then the left device in the bottom stack will fire and the pattern will
continue to the last device, where it will then return to the top.
This is a test to show that the correct fiber optic cables are connected
to the corresponding devices.
Normal Gating Test mode will fire the inverter at the output
frequency corresponding to the active reference (speed) command.
System Test
Prior to applying medium voltage, it is necessary to verify the entire
low voltage control circuit to ensure the drive operates as desired.
Failure to perform this test may result in damage to the drive or
process in the event that the control does not operate as expected. This
section of the manual provides instruction for the following five tests:
• System Test Mode
• Start/Stop Contactor Control
• Status Indicators
• Analog I/O
• Configurable Alarms
System Test Mode
The following procedure explains how to enter System Test Mode.
This allows the drive to operate the drive’s low voltage control
circuit without medium voltage present.
Drive status I/O will be active while performing tests in System Test
Mode. If the drive I/O is monitored remotely, process control should
be notified in advance to avoid confusion.
A T T E N T I O N A T T E N T I O N Ensure that the drive is isolated from medium
voltage prior to starting this test.