5.
Write each field controller's device address on
the white label below the DIP switch block on the
controller's cover.
Table 6 describes the FC bus and SA bus devices
addresses for Johnson Controls
®
MS/TP communications
bus applications.
Refer to the
MS/TP Communications Bus Technical Bulletin
(LIT-12011034)
for more information on controller device
addresses and how to set them on MS/TP buses.
Refer to the
Modernization Guide for Legacy N2 Controllers
(LIT-12012005)
for more information on controller device
addresses and how to set them on N2 buses.
Table 6: SA/FC bus device address descriptions for MS/TP Controllers
Device address
Use on description
0
(Switch 128 Off)
Reserved for FC Bus Supervisory Controller (not for use on field controllers).
1 to 3
(Switch 128 Off)
Reserved for peripheral devices (not for use on field controllers).
4 to 127
(Switch 128 Off)
Used for MS/TP devices (field controllers) that are hardwired to an SA Bus or FC Bus.
0 to 3
(Switch 128 ON)
Reserved addresses for wired devices (not for use on field controllers).
Note:
Metasys
field controllers ship with switch 128 ON and the remaining address switches off
rendering the controllers wired devices, which do not operate on MS/TP buses.
4 to 127
(Switch 128 ON)
Used for MS/TP devices (field controllers) that are used in a ZFR or a ZFR Pro Wireless Field Bus System.
Note:
Do
not
connect a controller with switch 128 ON to an active (
hard-wired
) SA or FC bus. When a
controller with switch 128 ON and a device address from 4 to 127 is connected to a wired field bus, the
entire field bus is rendered inoperable until the controller is disconnected or switch 128 is set to Off.
Setting the N2 Controller Address to be Greater than 127
N2-configured controllers support the full range of
possible N2 device addresses provided by the N2 protocol
standard (1–254). However, these controllers require
special configuration for addresses above 127.
Use the following instructions for controllers greater than
127.
Note:
Before you perform this procedure, make
sure that your controller has been converted
from BACnet to N2 protocol first. Refer to the
Modernization Guide for Legacy N2 Controllers
(LIT-12012005)
for more information.
Note:
This special configuration is required because
controller addresses above 127 were originally
intended for use with the Wireless Field Bus system.
1.
Disconnect the 24 VAC supply from the controller.
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
Important:
Electrostatic discharge can damage
controller components. Use proper electrostatic
discharge precautions during installation, setup, and
servicing to avoid damaging the controller.
Important:
Disconnect all power sources to the
controller before removing the 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
(Figure 3) 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.
Metasys
System FEC1611 and FEC1621 Field Equipment Controller Installation Guide
15