Figure 9: Device address DIP switch block set to
address 21
Note:
Metasys
field controllers ship with switch
128 ON and the remaining address switches off
rendering the controllers wired subordinate devices,
which do not operate on MS/TP buses, but will 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 the controllers:
1.
Set
all
of the switches on the 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.
Set the highest number switch that is less than or equal
to the intended device address to ON. Then continue set-
ting 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).
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 controller with switch 128
set to ON to an active (hard-wired) SA or FC bus.
When a controller with switch 128 set to 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.
Note:
Refer to the
WNC1800/ZFR182x Pro Series
Wireless Field Bus System Technical Bulletin
(LIT-12012356)
for more information on device
addresses in wireless applications.
4.
Set a unique and sequential device address for each
of the 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 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.
Table 7 describes the FC bus and SA bus devices
addresses for Johnson Controls MS/TP communications
bus applications.
Table 7: FC bus device address descriptions
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 master devices (field) that are hardwired to an SA Bus or FC Bus.
0 to 3
(Switch 128 ON)
Reserved addresses for wired subordinate devices (not for use on field controllers).
Note:
The controllers ship with switch 128 ON and the remaining address switches off rendering the
controllers wired subordinate devices, which do not operate on MS/TP buses.
4 to 127
(Switch 128 ON)
Valid for MS/TP Master controllers on
wireless FC Buses only
.
Note:
Do
not
connect a field 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 N2deviceaddressesprovidedby the N2 protocol
standard (1-254). However, these controllers require
special configuration for addresses above 127. Use the
following instructions for controllers with addresses
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.
FEC26 Field Equipment Controllers Installation Guide
17
