Establishing A Connection Via Modbus Rtu - Fronius PVI1903OHM Operating Instructions Manual

Establishing a
1
connection via
Modbus RTU
2
3
Smart Meter
Smart Meter TS
In order to implement various settings, the WLAN connection must briefly be opened::
1
2
3
NOTE!
Access the Ohmpilot via the network.
In networks with a DNS suffix, the Ohmpilot can be accessed at http://ohmpilotW.<DNS-
Suffix>, e.g. http://ohmpilotW.fronius.com
104
Connect the bus cabling (B) to the Ohmpilot.
(The bus cabling is carried out in parallel via the TX+, TX- and GND cables with the
Fronius Smart Meter and the Fronius inverter or Datamanager 2.0).
Terminate the bus cabling with a resistor on the first and last device.
The resistor can be activated on the Ohmpilot using DIP switch number 5. See (A).
Set Modbus address using numbers 1-3
Default address: 40 (For future applications, the Modbus address can be changed
using the DIP switches on the Ohmpilot.)
Fronius Smart Meter
Rx Tx GND
M+ M- GND
120Ω
Press the button on the Ohmpilot 2x.
The blue LED flashes (twice) as long as the WLAN access point is active (30 minu-
tes). Before the access point is opened, it searches for available WLAN networks.
Activate the "Ohmpilot" WLAN network on your smart device or PC.
In the browser, enter the website http://192.168.250.181 or http://ohmpilotW.local.
Alternatively, the Ohmpilot can also be searched on the network using the Fronius
Solar.web app.
(A) DIP switches
DIP 1-3 = Modbus address BCD
DIP 4 = reserve
DIP 5 = terminating resistor (120 Ohm)
NOTE!
Avoid confusion of cables.
Use a data cable that is clearly distinguis-
hable from the mains cable, so that there
is no confusion and injury and damage to
property are avoided.
NOTE!
Faulty cabling.
This is indicated by the red LED indicator
flashing 1x.
Fronius Inverter
D+ D- -
SnapINverter
M1+ M1- GND
GEN24
OFF
Fronius Ohmpilot
D+ D- -
1 2 3 4 5