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

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.

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

MS/TP Communications Bus for the BCPro System Technical Bulletin