Bacnet Ms/Tp Communications; Bacnet Ms/Tp Description; Baud Rates On The Ms/Tp Bus; Baud Rate And Mac Address Configuration - GE PanaFlow MV80 User Manual

4.3 BACnet MS/TP Communications

4.3.1 BACnet MS/TP Description

The BACnet Master-Slave/Token-Passing (MSTP) driver implements a data link protocol that uses the services of the
RS-485 physical layer. The MS/TP bus is based on BACnet standard protocol SSPC-135, Clause 9. BACnet MS/TP
protocol is a peer-to-peer, multiple master protocols based on token passing. Only master devices can receive the token,
and only the device holding the token is allowed to originate a message on the bus. The token is passed from master
device to master device using a small message. The token is passed in consecutive order starting with the lowest
address. Slave devices on the bus only communicate on the bus when responding to a data request from a master
device.

4.3.2 Baud Rates on the MS/TP Bus

An MS/TP bus can be configured to communicate at one of four different baud rates. It is very important that all of the
devices on an MS/TP bus communicate at the same baud rate. The baud rate setting determines the rate at which
devices communicate data over the bus. The baud rate settings available on MV80 and MV 82 Vortex Mass Flow
Meters are 9600, 19200 and 38400.

4.3.3 Baud Rate and MAC Address Configuration

1. Power on the IUT.
2. Press to go to the configuration menu.
Enter
3. Give the factory password
4. Navigate to the Diagnostics menu.
5. Press and press the right button immediately.
Enter
6. Navigate to the Config Code screen by continuously pressing the down button.
7. After reaching the Config Code screen, press the right button to navigate to the Comm. Type screen.
8. Change the Comm. Type to "Modbus" and press
Note: Modbus will enable Baud Rate and MAC address screens.
9. Press twice to return to the Diagnostics Menu.
Exit
10. Navigate to the Output menu by using the right or left arrow buttons.
11. Press the down button until you reach the Baud Rate and MAC address screens.
12. Change the required settings and press the
13. Complete the steps from
14. Reboot the device by powering it off and on.
Note: a. IUT supports 9600, 19200, 38400 baud rates.
b. MAC address range is 0-127.
PanaFlow™ MV80 & MV82 User's Manual
(use Up and Down arrows to enter the digits).
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and
Exit
b to g , and change the Comm. Type to
.
Enter
buttons to save the configuration.
Enter
Hart .
Chapter 4. Serial Communications
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