8
12 . To set the address for the 340MB transmitter, open the New
Address pull-down menu and select the correct polling ad-
dress which matches the polling address entered into the
master controller for this node of the Modbus network . Press
the Assign New Address button to transmit polling information
to the 340MB transmitter .
13 . To set the Dele baud rate for communication from the Modbus
buss to the Model 340MB transmitter, open the New Baud
Rate pull-down menu and select the desired value . The most
common baud rate is 9600 . Press the Assign New Baud Rate
button to transmit the symbol rate to the Model 340MB trans-
mitter . Press the Close button to return to the Main screen .
Modbus diagnostic utility
The MS/TP ReadBack diagnostic utility is provided as a helpful
tool to verify connection between the Model 340MB transmitter
and Modbus
network when installing a transmitter or while trouble-
shooting faulty communication between an individual node and the
master controller . To use this utility, the Model 340MB transmitter
must be connected to a PC or laptop and the Modbus network
as outlined below .
1 .
Connect the PC to the Model 340MB transmitter using
the Badger Meter Model A301 communications cable .
Plug the RS232 connector on the Model A301cable to
the 340MB socket labeled D .I .C . Comm Port, taking
care to properly align the tab on the plug and socket to
maintain polarity . Plug the DB9 connector on the op-
posite end of the Model A301 cable to an available PC
communications port . If a cable with a DB9 connector
is not available, a USB to DB9 adapter (e .g . IOGEAR
GUC232A) can be used .
2 .
If not already installed, connect the Model 340MB trans-
mitter to the Modbus network . Connect all three Model
340MB network terminals (+), (-), and REF to the Modbus
buss if the transmitter is the final node in a given network .
Otherwise, connect only terminals (+) and (-) to the Mod-
bus buss . Confirm the correct position of jumpers on the
Model 340MB transmitter . For the final transmitter in a
given Modbus network, NT, PU, and PD jumpers should
be in “open” position . Otherwise, NT, PU, and PD should
be in the “closed” position . Please refer to the Sample
Wiring Diagram to Modbus Network found on page 5 .
3 .
Open the Badger Meter Combo PC Software .
4 .
Follow steps 5 through 7 found on page 6 to open the
Model 340MB Main screen .
5 .
From the Main screen, select MS/TP ReadBack .
PRELIMINARY
