Setting a Device Address - BCPro - LIT-12011908 - General System Information - BCPro System - 4.0

MS/TP Communications Bus for the BCPro System Technical Bulletin

Brand
BCPro
Product name
BCPro System
Document type
Technical Bulletin
Document number
LIT-12011908
Version
4.0
Revision date
2020-03-16
Language
English

For most devices on an MS/TP bus, the (non-supervisory) device address is set by positioning the DIP switches on the device’s address DIP switch block. The DIP switch blocks are binary switch blocks, with each switch representing a binary numerical value when the switch is in the ON position. The CGM and CVM controllers have three rotary switches for setting the device address.

The device address set on the address DIP switch block or rotary switches applies to the device connection on the bus where the device is not the bus supervisor. For example, the rotary switches on CGMs or CVMs and the DIP switches on CH-PCAs, CH-PCGs, or CH-PCVs (master devices) set the device address for the device connection to the FC bus. If the C4-CGMs, C4-CVMs, CH-PCA, CH-PCG, or CH-PCV also supervise an SA bus, the CH-PCA's, CH-PCG's, or CH-PCV's address on an SA bus is 0 by default (Figure 1).

A CH-PCX has only one device connection, which can connect to either an FC bus or an SA bus (but not both); therefore, the device address set on a CH-PCX applies to the bus to which the A CH-PCX is connected. ( A CH-PCX is never a bus supervisor.)

Figure 1. MS/TP Bus Showing FC Bus and SA Bus Addresses

Table 1. Valid MS/TP Bus Address Values and Address Ranges for MS/TP Bus Devices

Address Value/ Address Range

Class

Devices

0

Bus Supervisor

FC Bus: BACnet Router

SA Bus: C4-CGMs, C4-CVMs, CH-PCA, CH-PCG, or CH-PCV

1–3

Reserved for JCI use

 

120-127

Reserved

ZFR1810 Wireless Field Bus Coordinator

4–127

Master Range

FC Bus:

C4-CGMs, C4-CVMs, CH-PCAs, CH-PCGs, CH-PCVs, CH-PCXs.

SA Bus: CH-PCXs

4–119 (Switch 128 ON)

Reserved

C4-CGMs, C4-CVMs, CH-PCAs/CH-PCGs/CH-PCXs/CH-PCVs: Wireless mode with address range of 4-127 and bit 128 active (where available)

128–254

Subordinate Range

Subordinate devices, VSDs, and NS network sensors on the SA Bus. Not Supported on the FC bus.

198

Reserved

VAV Balancing Sensor (handheld)

199

Reserved

Most NS Series Network Sensor models or VAV Balancing Sensor (wall-mounted)

200–203

Reserved

NS Series Network Sensors (specified models)

204–211

Reserved

NS-DTN7043-0 and NS-DTN7083-0 Network Sensors

212–219

Reserved

NS-BCN7004-0 Network CO2 Sensor

255

Broadcast

Do not apply address 255 to any device.

Important: On any CH-PCA, CH-PCG, CH-PCV, or CH-PCX that is hardwired to an MS/TP Bus, set the 128 DIP switch to the OFF position. Operating any CH-PCA, CH-PCG, CH-PCV, or CH-PCX that is hardwired to an MS/TP Bus with the controller’s 128 DIP switch set to the ON position results in communication failure on the bus.

As you set the device address on controllers with dip switch blocks, the best practice is to set the highest switch value first, then the next highest switch value, and so on, until the total of the switch values equal the intended device address. For example, positioning switches 16, 4, and 1 to ON sets the device address to 21 for a device on the FC bus.

Figure 2. Setting the Device Address on the address DIP Switch Block

Notes:

  • You must set switch 128 to OFF on all controllers that are hardwired to an FC bus.
  • Devices may go offline momentarily when a device address is changed on an active bus. A device reset is not required on CH-PC controllers or supervisory after changing the MS/TP address.

Some devices, such as the TEC26xx Series thermostats and third-party MS/TP devices, use their own configuration settings to establish the device address for their connection to the bus. Refer to the device manufacturer’s product documentation for instructions on setting the device address. The device address values for TEC thermostats and all third-party devices must comply with the rules and ranges described previously.