Establishing A Connection Via Modbus Rtu - Fronius Ohmpilot Bedienungsanleitung

Establishing a 1. Connect the bus cabling (B) to the Ohmpilot. (The bus cabling is carried out in parallel
Connection via
Modbus RTU
2. Terminate the RS485 bus with a resistance at the first and last device. The resistance
3. The Modbus address can be set using numbers 1-3.
Fronius Smart Meter
INPUT
1 3 4 6 7
86
via the TX+, TX- and GND cables with the Fronius Smart Meter and the Fronius
inverter or Datamanager 2.0).
can be activated on the Ohmpilot using DIP switch number 5. See (A).
Default address: 40
(For future applications, the Modbus address can be changed using the DIP switches
on the Ohmpilot.)
OUTPUT
RS 485
Rx / T x GND
-
+
9 11 A B C
120Ω
(A)
(A) DIP switches
DIP 1-3 = Modbus address BCD
DIP 4 = Reserve
DIP 5 = Terminating resistance
(120 Ohm)
(B) IMPORTANT! In the case of incorrect
cabling, this will be displayed by the
red LED flashing 1x.
Fronius
Datamanager
DT/PE
2.0
D
- D+ D-
OFF
WARNING! Use a data cable
that is clearly distinguishable
from the mains cable, so that
there is no confusion and
injury and damage to property
are avoided.
Fronius
Ohmpilot
1 2 3 4 5
D+ D- -
120Ω