Siemens SINAMICS V20 Operating Instructions Manual page 137

Parameter Function
P2012[0] USS PZD (process data) length
P2013[0] USS PKW (parameter ID value) length
P2014[0] USS/MODBUS telegram off time [ms]
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
Defines the number of 16-bit words in PZD part of USS
telegram.
Range: 0 to 8 (factory default: 2)
Defines the number of 16-bit words in PKW part of USS
telegram.
Possible settings:
= 0, 3, 4: 0, 3 or 4 words
= 127: variable length (factory default)
If time set to 0, no fault is generated (i.e. watchdog disa-
bled).
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
6.1 USS communication
137