
Figure 9: Device address switches set to 21
Note:
PC Series controllers ship with Switch 128 ON and the remaining address switches OFF.
This renders the controllers wired subordinate devices, which do not interfere on MS/TP Buses
and do not interfere with bus operation. Set a valid and unique device address on the PC
controller before applying power to the controller on the bus.
To set the device addresses on PC Series Controller:
1. Set all of the switches on the PC controller’s device address DIP switch block (128 through 1) to
OFF.
2. Set one or more of the seven address switches (64 through 1) to ON, so that the sum of
the switch numbers set to ON equals the intended device address. See Table 6 for valid PC
controller 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 Figure 9.
3. Set a unique and sequential device address for each of the 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 PC controllers do not need to be physically
connected on the bus in their numerical device address order.
4. Write each PC controller’s device address on the white label below the DIP switch block on the
controller’s cover.
Table 6 shows and describe the valid FC Bus and SA Bus device addresses for Johnson Controls MS/
TP communications bus applications.
Table 6: FC bus device address descriptions
Device address
Address description
0
(Switch 128 OFF)
Reserved for PC controllers
1 to 3
(Switch 128 OFF)
Reserved for peripheral devices (not valid for PC controllers).
4 to 127
(Switch 128 OFF)
Valid for PC Series Controllers on a
hard-wired
SA Bus or FC Bus.
19
PCV1617 and PCV1632 VAV Box Controllers Installation instructions