Siemens SINAMICS V20 Operating Instructions Manual page 141

Parameter Function
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
SINAMICS V20 Inverter
Operating Instructions, 09/2014, A5E34559884
Setting
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 disa-
bled).
Sets the unique address for the inverter.
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 inverter. Dur-
ing the powercycle, wait until LED has gone off or the dis-
play 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
regardless 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
Communicating with the PLC
6.2 MODBUS communication
141