Rockwell Automation GV3000/SE 230VAC 1-20 HP GP & Vector Drive Ver. 6.04 Software Start-Up and Ref. - Manual (Page 135)

4-49 Programming Reference
P.062 Option Port: Communication Loss Response (continued)
If P.062 = 0
The drive will consider a loss of network communication a drive fault resulting in an
IET-type stop sequence.
When P.062 is set to IET fault (0) and communication is lost:
• The drive latches a fault condition and performs a coast stop.
• The network communication loss fault is generated (nCL is displayed).
• The front panel REMOTE LED blinks, indicating that the network is inactive.
When network communication is re-establiched, you must reset the fault before the
drive can be restarted.
If P.062 = 1
The drive continues to operate using the last reference received from the network
master.
ATTENTION: In volts/hertz regulation, if P.000 (Control Source) is set
to OP (Option Port), and P.062 is set to 1 (Hold Last Reference), and
the drive loses communication with the network, the drive will maintain
the last frequency command sent to it. Ensure that driven machinery,
all drive-train mechanisms, and application material are capable of
safe operation at the maximum operating speed of the drive. Failure to
observe this precaution could result in bodily injury.
ATTENTION: In vector regulation, if U.000 (Torque Reference
Source) is set to 2 (Option Port), and P.062 is set to 1 (Hold Last
Reference), and the drive loses communication with the network, the
drive will no longer be regulating speed. Instead, motor speed will
vary according to the load, up to the overspeed limit. Ensure that
driven machinery, all drive-train mechanisms, and application material
are capable of safe operation at the maximum operating speed of the
drive. Failure to observe this precaution could result in bodily injury.
ATTENTION: When P.055 is set to ON, the STOP/RESET key is
functional only from the selected control source. As a safety
precaution,Reliance Electric recommends that an emergency stop
pushbutton be located near the drive in an easily accessible location.
As a further safety precaution, the user should post a warning on the
drive to alert personnel that the STOP/RESET key is not functional.
Failure to observe this precaution could result in severe bodily injury or
loss of life.
The response to network communication loss is:
• The drive continues to operate using the last reference received from the
network master.
• An entry is made into the drive's error log for each active-to-inactive transition of
the network communication status.
• The front panel REMOTE LED blinks, indicating that the network is inactive.
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