16. Add-on Modbus RTU
64
Dr. A. Kuntze
I
Gutes Wasser mit System
Robert-Bosch-Str. 7a
40668 Meerbusch
+49 (0) 2150-7066-0 / Fax -60
www.kuntze.com
16. Add-on Modbus RTU
Neon
®
instruments are optionally available with a serial interface RS 485 Modbus RTU. To use this
function you have to install the RS 485 circuit-board, observing the ESD-directive, and activate the
software with the appropriate add-on code obtained from Dr. Kuntze.
When setting up a bus with several instruments, mind that the instruments are connected in line, not
radially. Both ends of a long bus connection should be terminated with termination resistors of 120 Ohm.
With Neon
®
instruments, you can activate the termination via menu.
Note
Activate the bus termination only at the ends of the line. If you activate termi-
nations somewhere inbetween, this might cause malfunction in the bus com-
munication.
Select the symbol IN/OUT in the main menu and in the submenu,
select the symbol NETWORK. Here you can set the following
parameters:
Bus address
Assign a different number to each instrument in your bus system.
With this number, you can address the instrument from the master
instrument to read out data.
Bus termination
If you select ON from the drop-down list, the termination is activated
for this instrument.
