Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual

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COMMUNICATIONS
BACnet Communication
120
BACnet Communication
The VFD can be controlled and monitored through the BACnet MS/TP protocol over an RS-485 connection.
The VFD operates as an MS/TP master device, for which the protocol can support addressing for up to 128
master devices in a single MS/TP network.
BACnet conveys control and monitoring data as a collection of BACnet objects. The X-Drive BACnet protocol
supports 3 object types: Device, Analog Value (AV), and Binary Value (BV). The Read Property and Write
Property services can be used to interface to these objects. If the drive is configured to accept commands
via remote communications, it can be commanded to start, stop, run at a specified output frequency, target
a setpoint in PID control, and reset faults.
X-Drive Configuration for BACnet
Use the X-Drive’s internal COM1 Port to connect to a BACnet net -
work. COM1 can be accessed either through terminals SG+ and SG–
(1) or through one of the RJ45 connectors (2). RJ45 pins 4 and 5 are
connected in parallel with SG+ and SG– and pins 3 and 6 are parallel
with SGND and Ground.
To enable BACnet communications, set the following parameters:
Communication Parameters Setup
• PLC Com Type [PLC–23]: Set to
1_BACnet
. This enables BACnet on COM1 with the format RTU 8, N, 1.
When BACnet is enabled, Modbus communication, and PLC communication are disabled on COM1.
• BACnet MAC ID [Comm–24]: This should be set to BACnet’s MS/TP station number. Default = 10.
Range = 0 to 127.
• BACnet Speed [Comm–25]: This should be set to the BACnet communication baud rate. Default =
38400. Range = 9600, 19200, 38400, or 76800 bps.
• Device ID Lo [Comm–26] and Device ID Hi [Comm–27]: The combination of these two parameters is
the Device Object Identifier. [Comm–26] is usually set as the unique device number in the trunk. [Comm–
27]
is usually set to the trunk or building floor number. Refer to “BACnet Device ID Setup” on page 121 .
• Max Address [Comm–28]: This is the maximum number of Master nodes available in the trunk. Com -
munications will be faster if the setting is equal or close to the actual number of Master devices.
• Password [Comm–29]: Enter the BACnet password. If setup is successful, the keypad will display
8888.
System Parameters Setup
• HOA Mode Source [SET–60]: Set to 2_RS485 Serial . This enables BACnet to switch between Hand and
Auto modes.
• Auto Speed Ref [SET–07]: Set to 5_RS485 Serial . This enables BACnet to control the speed when in Auto
mode.
• Auto Run Cmd [SET–08]: Set to 2_RS485 Serial . This enables BACnet to initiate a Run Command in Auto
mode.
• Hand Speed Ref [SET–09]: Set to 1_RS485 Serial . This enables BACnet to control the speed when in Hand
mode.
• Hand Run Cmd [SET–10]: Set to 2_RS485 Serial . This enables BACnet to initiate a Run Command in Hand
mode.
MI1 MI3 MI5 MI7 SGND
MI2 MI4 MI6 MI8 SG+ SG–
1
2
8 1 8 1