Setup And Adjustments; Setting The Device Addresses - Johnson Controls IOM3711 Installation Instructions Manual

Setup and Adjustments

Setting the Device Addresses

Metasys field expansion modules are master devices on
MS/TP (SA or FC) buses. Before operating expansion
modules on a bus, you must set a valid and unique
device address for each expansion module on the bus.
You set a expansion module's device address by setting
the positions of the switches on the DIP switch block at
the top of the expansion module
addresses 4 through 127 are the valid addresses for
these expansion modules.
The DIP switch block has eight switches numbered 128,
64, 32, 16, 8, 4, 2, and 1
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 and FC bus application.
Figure 9: Device Address DIP Switch Block Set to
Address 21
To set the device addresses on Metasys field expansion
modules:
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). See
3. Set switch 128 to OFF to enable the hard-wired SA
and FC bus application.
IOM3711 Input/Output Module Installation Instructions
(Figure 3). Device
(Figure 9). Switches 64 through
for valid device addresses.
Figure 9.
Note: Do not connect a expansion module with
switch 128 set to ON to an active (hard-wired)
SA or FC bus. When a expansion module 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 expansion module is disconnected or
switch 128 is set to Off.
4. Set a unique and sequential device address for each
of the expansion modules 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 expansion
modules do not need to be physically connected on
the bus in their numerical device address order.
5. Write each expansion module's device address on
the white label below the DIP switch block on the
expansion module'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)
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