Siemens SINAMICS V20 Operating Instructions Manual page 188

Communicating with the PLC
7.2 MODBUS communication
Basic converter settings
Parameter Function
P0010 Commissioning parameter
P0970 Factory reset
P0003 User access level
P0700 Selection of command source
P2010[0] USS/MODBUS baudrate
P2014[0] USS/MODBUS telegram off time [ms]
P2021 Modbus address
P2022 Modbus reply timeout [ms]
P2023 RS485 protocol selection
r2024[0] USS/MODBUS error statistics
...
r2031[0]
r2018[0...7] CO: PZD from USS/ MODBUS on
RS485
P2019[0...7] CI: PZD to USS/MODBUS on RS485
P2034 MODBUS parity on RS485
P2035 MODBUS stop bits on RS485
186
Setting
= 30: restores to factory settings
Possible settings:
= 1: resets all parameters (not user defaults) to their default
values
= 21: resets all parameters and all user defaults to factory
reset state
Note: Parameters P2010, P2021, P2023 retain their values after a
factory reset.
= 3
= 5: USS/MODBUS on RS485
Factory default: 1 (operator panel)
Possible settings:
= 6: 9600 bps (factory default)
= 7: 19200 bps
= 8: 38400 bps
...
=12: 115200 bps
If time set to 0, no fault is generated (i.e. watchdog disabled).
Sets the unique address for the converter.
Range: 1 to 247 (factory default: 1)
Range: 0 to 10000 (factory default: 1000)
= 2: Modbus
Factory default: 1 (USS)
Note: After changing P2023, powercycle the converter. During the
powercycle, wait until LED has gone off or the display has gone
blank (may take a few seconds) before re-applying power. If P2023
has been changed via a PLC, make sure the change has been
saved to EEPROM via P0971.
The state of the telegram information on RS485 is reported regard-
less of the protocol set in P2023.
Displays process data received via USS/MODBUS on RS485.
Displays process data transmitted via USS/MODBUS on RS485.
Sets the parity of MODBUS telegrams on RS485.
Possible settings:
= 0: no parity
= 1: odd parity
= 2: even parity
Sets the number of stop bits in MODBUS telegrams on RS485.
Possible settings:
= 1: 1 stop bit
= 2: 2 stop bits
Operating Instructions, 10/2019, A5E34559884-012
SINAMICS V20 Converter