Owner's manual

DIN-MON™ SMART METER
62-0442—04 34
5.0 COMMUNICATION PROTOCOLS
The Din-Mon™ meter supports multiple communication protocols. Refer to section 2.1
Ordering Information to check your meter model configuration to determine which
protocol(s) it supports.
• Refer to section “Wiring the Communications” for wiring details.
• Refer to section “Setting Communication Protocol” for selecting available protocols.
If the protocol you need is not listed in the menu selection, verify the model number
you ordered.
• Refer to the Appendices for Modbus point maps, BACnet objects, and LonWorks
SNVTs.
5.1.1 Modbus RTU
The Din-Mon™ Modbus RTU meter communicates with building automation
equipment over a 3-wire (3-conductor) RS-485 network using Modbus RTU protocol.
The meter is shipped with a Modbus ID number of 1. The Modbus ID range is 1 to 247.
There can be no duplicate numbers on a RS-485 network, so caution must be taken
when assigning a meter ID number prior to its installation on the network.
5.1.2 BACnet MS/TP
The Din-Mon™ BACnet MS/TP meter communicates with building automation
equipment over RS-485 network using BACnet MS/TP protocol.
The meter is shipped with a BACnet instance device ID number of 1 and MS/TP MAC
of 1; both of these numbers must be unique within an MS/TP network.
The meter MS/TP MAC can be numbered from 0 to 127; the MAX Master range is 1 to
127; the BACnet instance device ID range is 0 to 4194303.
5.1.3 Baud Rate and Settings on RS-485
RS-485 communication can operate at different baud rates (speed). The baud rate is
selected via the LCD display menu. There are 4 baud rate selections: 9600 (factory
default), 19200, 38400, and 76800 baud; higher baud rates would require shorter
cable length. The setting is 8-parity bits, no-parity, 1-stop bit.