Setting the device address - Facility Explorer - Part No. 24-10143-616 - Field Device - PCA: Advanced Application Programmable Controller

About this task

FX-PC Series controllers are master devices on an MS/TP (SA or FC) bus. Before you operate FX-PCA controllers on a bus, you must set a valid and unique device address for each controller on the bus. You set an FX-PCA3611 controller's device address by setting the positions of the switches on the DIP switch block at the top of the controller (Figure 1). Device addresses 4 through 127 are the valid addresses for these controllers on an MS/TP FC Bus.

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 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 1. Device address DIP switch block set to address 21

Note: Field controllers ship with switch 128 ON and the remainining adress switches off rendering the controllers wired subordinate devices, which do not operate on MSTP buses, but do 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-PCA controllers, complete the following steps:

Procedure

Set all of the switches on the address DIP switch block (128 through 1) to OFF.
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.

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 totalequals theintendedaddress. Forexample, 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 1.
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 an FX-PC controller with switch128set to ON toanactive(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 Wireless Field Bus System Technical Bulletin (LIT-12011660) for more information on device addresses in wireless applications
Set a unique and sequential device address for each of the FX-PC 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.

Write each controller's device address on the white label below the DIP switch block on the controller's cover.

The following table describes the FC bus and SA bus devices addresses for FX-PC Series controllers communications bus applications.

Refer to the FX-PC Series Controllers MS/TP Communications Bus Technical Bulletin (LIT-12011670) for more information on controller device addresses and how to set them on MS/TP buses.

Table 1. SA/FC bus device address descriptions
Device address	Use on description
0 (Switch 128 Off)	Reserved for FC Bus Supervisory Controller (not for use on controllers).
1 to 3 (Switch 128 Off)	Reserved for peripheral devices (not for use on controllers).
4 to 127 (Switch 128 Off)	Used for MS/TP master devices (controllers) that are hardwired to an SA bus or FC bus.
0 to 3 (Switch 128 ON)	Reserved addresses for wired subordinate devices (not for use on controllers). Note: FX-PC 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.
4 to 127 (Switch 128 ON)	Valid for MS/TP Master controllers on wireless FC Buses only. Note: Do not connect a controller with switch 128 ON to an active (hard-wired) SA or FC bus. When a controller with switch 128 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.