4. Set a unique and sequential device address for each of the FX-PC controllers connected on
the SA or FC Bus, starting with device address 4. To ensure the best bus performance, set
sequential device addresses with no gaps in the device address range (4, 5, 6, 7, 8, 9, and so
on). The FX-PC controllers do not need to be physically connected on the bus in their numerical
device address order.
5. Write each FX-PC controller’s device address on the white label below the DIP switch block on
the controller’s cover.
Refer to the
FX-PC Series Controllers MSTP Communications Bus Technical Bulletin (LIT-12011670)
for
more information on FX-PC controller device addresses and how to set them on MSTP Buses.
Table 6 and Table 7 show and describe the valid FC Bus and SA Bus device addresses for Johnson
Controls MSTP communications bus applications.
Table 6: FC Bus device address descriptions
Device address
Address description
0
(Switch 128 OFF)
Reserved for FX Supervisory Controller (not valid for FX-PC controllers).
1 to 3
(Switch 128 OFF)
Reserved for peripheral devices (not valid for FX-PC controllers).
4 to 127
(Switch 128 OFF)
Valid for FX-PC Series Controllers on a
hard-wired
SA Bus or FC Bus.
Table 7: Wireless field bus device address
Device address
Address description
0 to 3
(Switch 128 ON)
Reserved addresses for wired subordinate devices (not valid for FX-PC
controllers).
Note:
FX-PC Series Controllers ship with 128 ON and the remaining
address switches OFF, rendering the controllers wired subordinate
devices, which do not operate on FX-PC Series Controller field buses.
4 to 127
(Switch 128 ON)
Valid for FX-PC Series Controllers on
wireless FC Buses only
.
Note:
Do
not
connect a an FX-PC Series controller with these device
addresses to an active
wired
SA or FC Bus. When a controller with
one of these device address is connected to a wired field bus, the
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 (1-255). However, these controllers require special configuration for
addresses above 127.
Use the following instructions for controller addresses greater than 127.
Notes:
21
FX-PCV1615/1626/1628/1630 Programmable VAV Box Controllers Installation Instructions
