Rockwell Automation GV3000/SE AC Drive AutoMax Network Communication Board, M/N 2AX3000 - Manual (Page 51)

3-4 AutoMax Network Communication Option Board for the GV3000/SE AC Drive
P.062 Option Port: Communication Loss Response
This parameter
specifies how the
drive responds to a
network
communication loss
when the Control
Source (P.000)
parameter is set to
OP (Option port). Parameter Range: 0 = IET fault
1 = Hold last reference
2 = Use terminal strip reference
Default Setting: 0
Parameter Type: Tunable
Refer also to parameters: P.000 Control Source
If the option port is not in control of the drive, but is only monitoring drive operation,
then loss of network communications has no effect on drive operation. In all cases,
the Network Option board, upon loss of communication with the network master, will
attempt to re-establish the communication link.
To eliminate extraneous fault conditions when a drive configured for network
operation is powered up, the drive will delay for approximately 20 seconds after
power up before annunciating a fault condition. A fault condition will be annunciated
if network communication is not established before the 20-second power-up timer
expires, or if network communication was established and then lost.
If the drive loses communication with the network, overspeed protection for the drive
will be in effect under all circumstances. For V/Hz regulation, you program
overspeed protection in H.022. For vector regulation, overspeed protection is fixed
at 130% of Maximum Speed (P.004). When the motor goes above the overspeed
limit, the drive faults and stops.
If P.062 = 0
The drive will consider a loss of network communication to be 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-established, you must reset the fault before the
drive can be re-started. See the drive software instruction manual for information on
resetting faults. (A fault reset does not clear the error log.)