Rockwell Automation 7000 PowerFlex Medium Voltage AC Drive (B Frame) - Classic Control - Manual (Page 471)

Troubleshooting 7-49
7000 “B” Frame 7000-UM150I-EN-P – June 2013
WARNING
MESSAGE
WARNING
CODE
DESCRIPTION RECOMMENDED ACTIONS
2U1A Device Wrn 264 PWM RECTIFIER SGCT WARNING
FOR REDUNDANT DEVICE CAPABILITY
ONLY
This warning will occur during the initial
contactor closure, the diagnostic sequence
after a start command, or the diagnostic
sequence after a stop command. The
rectifier monitors the state of the feedback
before a gate pulse is given, and monitors
the feedback after a gate pulse has been
sent. The SGCT has smart diagnostics, so
the feedback may indicate short before
firing, and if the pulse is received and the
device is really shorted, the diagnostic will
toggle the feedback to let you know the
problem is with the device, or the power
supply for that device.
The firmware now completes a diagnostics
sequence immediately after any drive reset,
with the goal of detecting warnings before
any destructive action is taken from the next
action. The main example of this is closing
the input contactor on a shorted bridge.
– Complete a resistance check per the
instructions in the manual
– NOTE: SGCTs may not have completely
shorted, and still could read in the kΩ
range – Any devices with low suspect
readings should be changed
– Check the LED status of the SCGT gate
driver card for abnormal readings
– Complete a Gating Test mode check on
the devices
– Verify the associated 20V power supply
is powered and active
– Verify all the power connections to the
SCGT firing card are seated properly
– NOTE: There is only the Redundant
option available on the Rectifier, and
only on 6P drives (SCR orPWM). You
can not have N-1 operation on the
rectifier since we can not control the line
voltage.
2U1B Device Wrn 270
2U1C Device Wrn 282
2U4A Device Wrn 267
2U4B Device Wrn 273
2U4C Device Wrn 285
2V3A Device Wrn 266
2V3B Device Wrn 272
2V3C Device Wrn 284
2V6A Device Wrn 269
2V6B Device Wrn 275
2V6C Device Wrn 287
2W2A Device Wrn 265
2W2B Device Wrn 271
2W2C Device Wrn 283
2W5A Device Wrn 268
2W5B Device Wrn 274
2W5C Device Wrn 286
2U1A Online Wrn 252 PWM RECTIFIER SGCT WARNING
FOR REDUNDANT DEVICES CAPABILITY
ONLY
This warning will occur during operation of
the drive. The drive has detected that the
feedback from the device was not correct,
and does not wait to determine the exact
problem. The drive polls the entire bridge 3
times before and 3 times after each gating
command. All 6 of these readings for each
device must be consistent for the warning to
occur. There is also a parameter called
Rectifier Device Diagnostic Delay (P266),
which allows you to change the number of
consecutive firings to eliminate nuisance
warnings. It will still poll 3 times before and
after each firing, but will now require the
condition to exist for the number of
consecutive firings set in the Diagnostic
Delay parameter for a warning to occur.
The firmware now completes a diagnostics
sequence immediately after any drive reset,
with the goal of detecting warnings before
any destructive action is taken from the next
action
– Complete a resistance check per the
instructions in the manual
– NOTE: SGCTs may not have completely
shorted, and still could read in the kΩ
range – Any devices with low suspect
readings should be changed
– Check the LED status of the SCGT gate
driver card for abnormal readings
– Complete a Gating Test mode check on
the devices
– Verify the associated 20V power supply
is powered and active
– Verify all the power connections to the
SCGT firing card are seated properly
– Reset the drive and let the offline
diagnostics further define the problem
– For nuisance faults, contact the factory
about extending the Diagnostic Delay
– NOTE: There is only the Redundant
option available on the Rectifier, and
only on 6P drives (SCR orPWM). You
can not have N-1 operation on the
rectifier since we can not control the line
voltage.
2U1B Online Wrn 258
2U1C Online Wrn 276
2U4A Online Wrn 255
2U4B Online Wrn 261
2U4C Online Wrn 279
2V3A Online Wrn 254
2V3B Online Wrn 260
2V3C Online Wrn 278
2V6A Online Wrn 257
2V6B Online Wrn 263
2V6C Online Wrn 281
2W2A Online Wrn 253
2W2B Online Wrn 259
2W2C Online Wrn 277
2W5A Online Wrn 256
2W5B Online Wrn 262
2W5C Online Wrn 280