Rockwell Automation 2LW3000 LonWorks Communication Option Module for VTAC 7 Drives User Manual
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6-4
LonWorks Module for VTAC 7 Drives
P.062 Option Port: Communication Loss Response
(continued)
If P.062 = 2
The drive gets its speed/torque reference from the terminal strip analog input and its
stop input from the terminal strip stop input. All other inputs are held at the last values
received from the network.
This allows the network to continue controlling the drive reference with a direct-wired
analog output to input, and to stop the drive with a direct-wired digital output to input.
Note that if P.054 (Level Sense Start Enable) = OFF and the drive is stopped while in
this mode, it cannot be re-started until network communication is re-established or the
Control Source (P.000) is changed.
Note that in this configuration, it might not always be possible to stop the drive over
the network.
The response to network communication loss is:
•
The drive continues to operate, using the analog input from the Regulator board
terminal strip.
•
An entry is made into the drive’s error log for each active-to-inactive transition of
network communication status.
•
The front panel REMOTE LED blinks, indicating that the network is inactive.
If network communication is re-established, the drive will again follow the reference
and sequencing control inputs supplied by the network. Note that if P.054 = ON and
the start and stop inputs are on (1), the drive will start.
!
ATTENTION: If P.062 = 2 and P.054 (Level Sense Start Enable) = ON
and network communication is lost while the drive is running, the terminal
strip stop input will function as a STOP/RUN input. If the terminal strip
stop input is opened, the drive will stop. If the terminal strip stop input is
closed, the drive will re-start. Failure to observe this precaution could
result in severe bodily injury or loss of life.
!
ATTENTION: The drive is not equipped with a coast-stop pushbutton.
You must install a hardwired operator-accessible pushbutton that
provides a positive interrupt and shuts down the drive. See the drive
hardware instruction manual for wiring information. Failure to observe
this precaution could result in bodily injury.