4
Series 70
Servo NXT - EtherNet/IP
Installation, Operation and Maintenance Manual
3.1 Operational Modes
3.1.1 Remote Mode
By default, the operating mode of the Servo
NXT EIP is Remote Mode, where the valve
is positioned based on commands from the
EtherNet/IP network. Exiting another mode of
operation generally results in the Servo NXT EIP
returning to remote mode.
3.1.2 Local Mode
Local Mode is entered if a connection is made
to the Control Box terminals and one or both
terminal voltages are pulled low. This allows the
Servo NXT EIP to be controlled by a local control
box, mounted to or near the actuator.
This mode of operation prevents remote
operation of the Servo NXT EIP. Once exiting
Local Mode, the unit will return to Remote
Mode.
3.1.3 Manual Mode
This operating mode allows for the actuator to
be controlled directly from the buttons on the
Servo NXT EIP. By utilizing the keypad, the user
can change the position of the valve with a
single button press.
Manual mode is exited in the same way it is
entered: by pressing and holding the manual
mode button for 1 second. While in manual
mode, the indicator next to the manual mode
button remains lit. Manual mode can only be
entered when the unit is in Remote Mode.
This mode allows the unit to be positioned using
the buttons on the Servo NXT EIP.
• Up arrow button – energizes actuator in the
open direction
• Down arrow button – energizes actuator in
the close direction
• Enter button – brakes the actuator if it is
operating
This mode of operation prevents remote
operation of the Servo NXT EIP. Once exiting
Manual Mode, the unit will return to Remote
Mode.
3.1.4 Autocalibration Mode
The Servo NXT EIP uses an automated calibration
sequence to determine the operating points
for the application in which it is installed. These
operating points allow the Servo NXT EIP to
calculate the correct feedback position of the
product, making autocalibration an important
step during commissioning.
Servo NXT EIP units that have not been
calibrated will flash the indicator next to
autocalibration button to show that they are
using default values for calculating position.
Autocalibration Mode is entered by pressing
and holding the Autocalibration button for at
least 3 seconds. While in Autocalibration Mode,
the autocalibration indicator remains lit. Upon
completion of the autocalibration sequence, the
autocalibration indicator will no longer flash and
remain off, indicating that the new parameters
have been stored in memory.
If a fault occurs during autocalibration, then
the autocalibration sequence is aborted and
all the fault LEDs will start flashing to indicate
a failed autocalibration attempt. The unit will
not operate while this fault is active. To clear
the fault, the handwheel can be pulled out to
indicate operator interaction. Additionally, there
is also an output bit that can be toggled to clear
the fault.
No other operating modes can be entered during
autocalibration and entering Autocalibration
Mode will override any previous mode of
operation. This mode of operation prevents
remote operation of the Servo NXT EIP. Once
exiting Autocalibration Mode, the unit will return
to Remote Mode.
