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Setup and Adjustments
Setting the Device Addresses
Metasys® field controllers are master devices on MS/TP
(SA or FC) buses. Before operating 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
Device addresses 4 through 127 are the valid addresses
for these controllers.
The DIP switch block has eight switches numbered 128,
64, 32, 16, 8, 4, 2, and 1. Switches 64 through 1 are
device address switches. Switch 128 is a mode switch
that enables a controller to operate on a ZFR/ZFR Pro
Series Wireless Field Bus. Set switch 128 to Off to enable
the hard-wired SA or FC bus application.
Figure 9: Device Address DIP Switch Block Set to
Address 21
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
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).
3. Set switch 128 to OFF to enable the hard-wired SA
or FC bus application.
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.
IOM1711 and IOM2711 Input/Output Module Installation Instructions
(Figure
for valid device addresses.
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.
9).
5. Write each 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.
Table 6: SA/FC Bus Device Address Descriptions
Device
Use on Description
Address
0
Reserved for FC Bus Supervisory Controller
(not for use on controllers).
(Switch
128 Off)
1 to 3
Reserved for peripheral devices (not for use
on controllers).
(Switch
128 Off)
4 to 127
Used for MS/TP master devices (controllers)
that are hardwired to an SA Bus or FC Bus.
(Switch
128 Off)
Removing the Controller Cover
Important: Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
Important: Disconnect all power sources to the
controller before removing cover and
changing the position of any jumper or the
EOL switch on the controller. Failure to
disconnect power before changing a jumper
or EOL switch position can result in damage
to the controller and void any warranties.
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