48
FEM630 |
ELECTROMAGNETIC FLOWMETER | OI/FEM630-EN REV. A
HART® communication
Note
The HART® protocol is not secure, 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.
The process values of the HART variables can be set in the
device menu.
Modbus® communication
Note
The Modbus® protocol are not secure, 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.
6 . . .Electrical connections
Digital communication
HART output
Terminals
Active: Uco / 32
Passive: 31 / 32
Protocol
HART 7.1
Transmission
FSK modulation on current output 4 to 20
mA in accordance with the Bell 202 standard
Baud rate
1200 baud
Signal amplitude
Maximum 1.2 mAss
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
Factory setting of the HART process variables
HART process variable
Process value
Primary Value (PV)
Q
m
– Mass flow
Secondary Value (SV)
Q
v
– Volume flow rate
Tertiary Value (TV)
p – Density
Quaternary Value (QV)
T
m
– Measuring medium temperature
