Basic Settings For Communication - Siemens SINAMICS G110M Function Manual

5.4.1

Basic settings for communication

Overview
Depending on the particular inverter, you have the following options when setting
communication via Modbus RTU:
● Default setting 21 "USS Fieldbus" for all inverters with RS485 interface
● Default setting 109 "BT Mac 9: Modbus RTU Fieldbus" only for CU230P-2 HVAC /
CU230P-2 BT.
For additional information, please refer to the operating instructions of your inverter.
Procedure with default setting 21 "USS Fieldbus"
Proceed as follows to set communication via Modbus RTU:
1. Activate communication via the RS485 interface using one of the following options:
– with STARTER under Control Unit/Configuration "Default settings of the
– With the BOP-2 during the basic commissioning under step "MAc PAr P15":
– using the expert list or parameter number:
2. Set the bus protocol
– With STARTER under Control Unit/Communication/Fieldbus:
– using the BOP-2 via parameter p2030:
3. Set the inverter address.
4. Make additional changes based on the parameters listed in the following section.
5. If you are working with STARTER, back up the settings with
This means that you have made the settings for communication via Modbus.
Fieldbuses
Function Manual, 01/2016, FW V4.7 SP6, A5E34229197B AC
Overview of the manuals (Page 235).
setpoint/command sources":
21: USS fieldbus
FB USS
p0015 = 21
2 Modbus
p2030 = 2
Communication via RS485
5.4 Communication using Modbus RTU
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