Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter - Manual (Page 57)

Rev. 8/02
-3. 19- TFXM
An RS485 driver and Modbus protocol is utilized by the TFXM
to communicate between the two channels located within the
TFXM flow meter enclosure (if so equipped), communicate with
satellite TFX flow meters and to interface with a personal com-
puter system. The TFXM can be used as the Primary meter
(Master) to program other Secondary (Slave) meters located
on the RS485 network. The TFXM contains a feature that per-
mits up to 8 flow measurement channels to be mathematically
manipulated. Software configuration is covered in Section 4 of
this manual.
RS485 interconnections are made at the terminal block located
within the TFXM Field Wiring Access Panel. See Figure 1.4 .
Utilize two conductor plus shield wiring cable for this purpose.
Avoid running these cables in wiring trays or conduits carrying
AC power or other electrically noisy devices.
RS485 MO
Select SLAVE for all of the TFXD meters.
RS485 BA
Select a Baud rate that is compatible with the operating system
– typically 9600.
ADDRESS
Each TFXD connected on the communications bus must have
an unique address number assigned.
PART 3 - KEYPAD CONFIGURATION