2. Remove the FC Bus connector from the
controller.
3. Set the address switch set to the desired N2
address.
4. Set the address switch segment labeled 128 to
OFF.
5. Reconnect the 24 VAC supply to the controller.
6. Using an SA bus connection, download the
firmware and controller application file. The
download process asks to confirm switching the
communication protocol to N2.
7. Click
OK
.
8. After the download is finished, disconnect the
24 VAC supply to the controller.
9. Set the address switch segment labeled 128 to
ON.
10. Reattach the FC Bus connector to the controller.
11. Reconnect the 24 VAC supply to the controller.
Removing the controller cover
CAUTION:
Electrostatic discharge can damage
controller components. Use proper electrostatic
discharge precautions during installation, setup, and
servicing to avoid damaging the controller.
Attention:
Disconnect all power sources to the
controller before removing cover and changing
the position of any jumper or the EOL switch on
the controller. Failure to disconnect power before
changing a jumper or EOL switch position can result
in damage to the controller and void any warranties.
The controller cover is held in place by four plastic
latches that extend from the base and snap into
slots on the inside of the housing cover.
To remove the controller cover:
1.
Place your fingernails under the two cover lift tabs
on the sides of the housing cover and gently pry the
top of the cover away from the base to release the
cover from the two upper latches.
2.
Pivot the top of the cover further to release it from
the lower two latches.
3.
Replace the cover by placing it squarely over the
base, and then gently and evenly push the cover
on to the latches until they snap into the latched
position.
Controller cover removed showing EOL
switch & current jumpers
Figure 10: Controller with cover removed showing
EOL switch and jumper positions
Setting the End-of-Line (EOL) switch
Each controller has an EOL switch, which, when set to ON,
sets the controller as a terminating device on the bus.
See the following figure for the EOL switch location. The
default EOL switch position is OFF.
Figure 11: End-of-Line switch positions
To set the EOL switch on a controller:
1.
Determine the physical location of the controller on
the FC bus.
2.
Determine if the controller must be set as a
terminating device on the bus.
Note:
Refer to the
MS/TP Communications Bus
Technical Bulletin (LIT-12011034)
for detailed
information regarding EOL termination rules and
EOL switch settings on FC buses.
3.
If the controller is a terminating device on the FC
bus, set the EOL switch to ON. If the controller is not
a terminating device on the bus, set the EOL switch
to OFF.
When a controller is connected to power with its EOL
switch set to ON, the amber EOL LED on the controller
cover is lit.
FEC26 Field Equipment Controllers Installation Guide
18
