Setup and adjustments
Setting the device addresses
About this task:
FX-PCX 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 (Figure 10).
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 an FX-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
.
Figure 10: Device address DIP switch block set to Address 21
Note:
FX-PCX 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 FX-PCX 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 exam-
ple, 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 an FX-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.
FX-PCX17 and FX-PCX27 Expansion Input/Output Module Installation Instructions
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