Digital Communication; Hart® Communication; Modbus® Communication - ABB SensyMaster FMT430 Operating Instructions Manual

SensyMaster FMT430, FMT450 THERMAL MASS FLOWMETER | OI/FMT430/450-EN REV. B

Digital communication

HART® Communication
Note
The HART® protocol is an unsecured protocol, as such the
intended application should be assessed to ensure that these
protocols are suitable before implementation.
In connection with the DTM (Device Type Manager) available to
the device, communication (configuration, parameterization)
can be carried out FDT 0.98 or 1.2 (DSV401 R2).
Other tool or system integrations (e.g. Emerson AMS / Siemens
PCS7) on request.
The necessary DTMs and other files can be downloaded from
www.abb.com/flow.
HART output
Terminals
Protocol
Transmission FSK modulation on current output 4 to 20 mA in
Baud rate
Signal amplitude
Factory setting of the HART® process variables
Process variable
Primary Value (PV)
Secondary Value (SV)
Tertiary Value (TV)
Quaternary Value (QV)
The process values of the HART® variables can be set in the
device menu.
Active: Uco / 32
Passive: 31 / 32
HART 7.1
accordance with the Bell 202 standard
1200 baud
Maximum 1.2 mAss
Process value
Mass flow
Temperature
Mass (counter)
Standard flow rate
Modbus® communication
Note
The Modbus® protocol is an unsecured protocol, as such the
intended application should be assessed to ensure that these
protocols are suitable before implementation.
Modbus is an open standard owned and administrated by an
independent group of device manufacturers styled the Modbus
Organization (www.modbus.org).
Using the Modbus protocol allows devices made by different
manufacturers to exchange information via the same
communication bus, without the need for any special interface
devices to be used.
Modbus protocol
Terminals V1 / V2
Configuration Via the Modbus interface or via the local operating
interface in connection with Asset Vision Basic
(DAT200) and a corresponding Device Type Manager
(DTM)
Transmission Modbus RTU - RS485 serial connection
Baud rate 2400, 4800, 9600, 19200, 38400, 56000, 57600,
115200 baud
Factory setting: 9600 baud
Parity None, even, odd
Factory setting: odd
Stop bit One, two
Factory setting: One
IEEE format Little endian, big endian
Factory setting: Little endian
Typical response time < 100 ms
Response delay time 0 to 200 milliseconds
Factory setting: 10 milliseconds
69