Badger Meter Impeller Data Industrial 3100 Series, User Manual, Page: 21 / 28

Communication
RS-485 COM Port Configuration
The RS-485 is very simple to configure .
1 . Select the communications type: Modbus or BACnet .
2 . Choose the BAUD Rate: Auto, 300, 1200, 2400, 9600, 19200, 38400, or 76800 to match the rest of the devices on the
network . The factory default of 9600 is recommended for most systems . The lower the baud rates have greater stability,
and greater tolerance of wiring and other hardware issues .
3 . Configure the Modbus or BACnet are described in there respective sections .
Modbus
Network: RS485
Baud Rate: Selectable
Protocol: RTU or ASCII
Addresses: 001 to 248
Slave only
Read Input Registers 30001- 39999 (Function “04”)
Data Type: IEEE 754 Float (ABCD – CDAB)
Each variable is stored in two Modbus registers; lowest byte in the first and highest in the second .
Only the variable value is transmitted .
The associated units of measure must be manually configured in the receiving Modbus device .
1 Flow 1 Rate (Input Register 30002 + 30003)
2 Flow 2 Rate (Input Register 30004 + 30005)
3 Flow 1 Total (Input Register 30006 + 30007)
4 Flow 2 Total (Input Register 30008 + 30009)
BACnet
The Model 3100 can be configured to communicate on a BACnet RS-485 MSTP (Master Slave Token Passing) system .
Configuration is via the front panel key pad .
The following settings are required
• Baud Rate: [9600;19200;38400; or 76800] . The recommended factory default is 9600 .
• MSTP Address: [0-127] . Each device must have a unique address .
• MSTP MAX master: [0-127] . This range must be greater than the highest address on the network .
• Device Instance: [00000000-99999999] . This is a unique identifier for each device in the system .
Object Name I/O (Write/Read) Object Type Object ID Units
BACnet Address I/O Analog Value AV1
BACnet BaudRate I/O Multi-State MSV1 See Note 1
Flow 1 Rate O Analog Input AI1 Same as Displayed
Flow 2 Rate O Analog Input AI2 Same as Displayed
Flow 1 Total O Analog Input AI3 Same as Displayed
Flow 2 Total O Analog Input AI4 Same as Displayed
Note 1: 0 = Auto, 1 = 9600, 2 = 19200, 3 = 38400, 4 = 76800
Note 2: Units of measure are selected by installer from a list of pre-programmed units, or as custom units created by the
installer . BACnet will transmit in the same units as displayed on the Model 3100 front panel LCD .
Programming
Page 21 August 2014 CTL-UM-001026-EN-04