is a mode switch that enables a field controller to
operate on a ZFR/ZFR Pro Series Wireless Field Bus.
Switch 128 must be set to OFF for all hard-wired SA
and FC Bus applications. Set Switch 128 to ON for
wireless FC Bus applications only.
Figure 9: Device Address Switches Set to 21
Note:
Metasys
field controllers ship with Switch
128 ON and the remaining address switches
OFF. This renders the controllers wired
subordinate devices, which do not interfere
on MSTP Buses and do not interfere with
bus operation. Set a valid and unique device
address on the controller before applying
power to the controller on the bus.
To set the device addresses on a
Metasys
field
controller:
1. Set all of the switches on the field controller’s
device address DIP switch block (128 through 1)
to OFF.
2. Set one or more of the seven address switches
(64 through 1) to ON, so that the sum of the
switch numbers set to ON equals the intended
device address. See Table 7 and Table 8 for
valid field controller addresses. Set the highest
number switch that is less than or equal to the
intended device address to ON. Then continue
setting lower numbered switches until the total
equals the intended address. For example, if
the intended device address is 21, set Switch 16
to ON first, then set Switch 4 ON, followed by
Switch 1 (16+4+1=21). See Figure 9.
3. Set Switch 128 to ON only for controllers
on a ZFR/ZFR Pro Series Wireless Field Bus
application. For all hard-wired SA and FC Bus
applications, ensure that Switch 128 is set to
OFF.
Note:
Do not connect a wirelessly enabled
field controller to a wired FC Bus.
Refer to the
WNC1800/ZFR182x Pro Series
Wireless Field Bus System Technical Bulletin
(LIT-12012356)
or the
ZFR1800 Series
Wireless Field Bus System Technical Bulletin
(LIT-12011295)
for more information on
device addresses in wireless applications.
4. Set a unique and sequential device address
for each of the field 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 field controllers do not need to
be physically connected on the bus in their
numerical device address order.
5. Write each field controller’s device address on
the white label below the DIP switch block on
the controller’s cover.
Refer to the
MSTP Communications Bus Technical
Bulletin (LIT-12011034)
for more information on field
controller device addresses and how to set them on
MSTP Buses.
Table 7 and Table 8 show and describe the valid
FC Bus and SA Bus device addresses for Johnson
Controls MSTP communications bus applications.
Table 7: FC Bus device address descriptions
Device address Address description
0
(Switch 128
OFF)
Reserved for FC Bus Supervisory Controller (not
valid for field controllers).
1 to 3
(Switch 128
OFF)
Reserved for peripheral devices (not valid for
field controllers).
4 to 127
(Switch 128
OFF)
Valid for MSTP Master field controllers on a
hard-wired
SA Bus or FC Bus.
Table 8: Wireless field bus device address
Device address Address description
0 to 3
(Switch 128 ON)
Reserved addresses for wired subordinate
devices (not valid for field controllers).
Note:
Metasys
controllers ship with 128
ON and the remaining address switches
OFF, rendering the controllers wired
subordinate devices, which do not operate
on
Metasys
field buses.
VMA1617 and VMA1632 VAV Controllers Installation Guide
16
