Siemens SINAMICS V90 Operating Instructions Manual page 211

Note
There is no priority when BOP, V-ASSISTANT, and USS access the same parameter at the
same time, the value of the parameter depends on the last access operation.
Operating steps
Main step
①
Configure the setup and program the PLC.
②
Configure the RS485 bus address by parameter
p29004.
③
Select the USS communication protocol by parameter
p29007.
④
Set the transmission baud rate by parameter p29009.
⑤
Set control mode for the drive.
⑥
Save the parameters and restart the drive.
⑦
Access the parameters via USS.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2015, A5E36037884
Sub step/comment
The RS485 bus is used to transfer current absolute position of
the servo drive to the upper controller/PLC. You can configure
the slaver address from 1 to 31.
p29007 = 0: no protocol
•
p29007 = 1: USS protocol
•
p29007 = 2: Modbus protocol
•
5: 4800 baud
•
6: 9600 baud
•
7: 19200 baud
•
8: 38400 baud
•
9: 57600 baud
•
10: 76800 baud
•
11: 93750 baud
•
12: 115200 baud
•
13: 187500 baud
•
For IPos control mode, you can change the following parame-
ters via USS:
p2617[0...7], p2618[0...7], p2572, p2573
•
For S control mode, you can change the following parameter
via USS:
p1001 to p1007
•
Ten monitor parameters can be read by USS:
r0020, r0021, r0026, r0027, r0031, r0032, r0034, r0807,
•
r2556, and r2521
Control functions
7.7 Communicating with the PLC
211