Setup and Adjustments
Setting the Device Addresses
FX-PCG controllers are master devices on MS/TP (SA
or FC) buses. Before operating FX-PCG controllers on
a bus, you
must
set a valid and unique device address
for each controller on the bus. You set a controller's
device address by setting the positions of the switches
on the DIP switch block at the top of the controller (
). Consult the appropriate Communication Technical
Bulletin to find valid addresses for these controllers.
Figure 9: Device Address DIP Switch Block Set to
Address 21
Note:
FX-PCG 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.
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
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
3. Set switch 128 to ON
only
for controllers on an
FX-ZFR 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
FX-ZFR Series Wireless Field Bus
System Technical Bulletin (LIT-12011660)
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 FX-PCG's device address on the white
label below the DIP switch block on the controller's
cover.
describes the FC bus and SA bus devices
addresses for Johnson Controls
®
MS/TP
communications bus applications.
Refer to the
FX-PC Series Controllers MS/TP
Communications Bus Technical Bulletin
(LIT-12011670)
or
MS/TP Communications Bus for
BCM System Technical Bulletin (LIT-12011908)
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
Use on Description
Device
Address
Reserved for FC Bus Supervisory Controller
(not for use on FX-PC controllers).
0
(Switch
128 Off)
Reserved for peripheral devices (not for use
on FX-PC controllers).
1 to 3
(Switch
128 Off)
18
FX-PCG16 General Purpose Programmable Controller Installation Instructions
