The DIP switch block has eight switches numbered 128, 64, 32, 16, 8, 4, 2, and 1 (
Figure 9
). Switches 64 through
1 are device address switches. Switch 128 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
. Non-wireless devices may use addresses greater than 127
if they are using the N2 protocol.
Figure 9: Device Address DIP Switch Block Set to Address 21
Note: Metasys
FEC controllers ship with switch 128 ON and the remaining address switches off rendering the
controllers wired slave 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
Metasys
field 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 though 1) to ON, so that the sum of the switch numbers set
to ON equals the intended device address. See
Table 6
for valid device 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 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.
Refer to the
WNC1800/ZFR182x Pro Series Wireless Remote 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 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 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.
20
FEC1611 and FEC1621 Field Equipment Controller Installation Instructions