Siemens SINAMICS V90 Operating Instructions Manual page 218

Control functions
7.7 Communicating with the PLC
9.
10.
Example 3
This example shows the operating procedures when we use the setpoint and control word
from Modbus (p29008 = 1) as the Modbus control source in IPos control mode.
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6.
218
Set the motor to SON status.
You can servo on the motor with external terminal DI signal or simulated DI signal
(registers 40280/40281 and 40282/40283).
Write the speed setpoint via the register 40101.
Note:
You can calculate the actual speed value with the scale factor. Value 0x4000 repre-
sents the value of 100% × motor rated speed. Therefore, 0x2000 represents half of
the motor rated speed.
Set RS485 bus address for the drive.
• p29004 = 1
Select the Modbus protocol by p29007.
• p29007 = 2
Select Modbus control source by p29008.
• p29008 = 1
Set the transmission baud rate by p29009.
• p29009 = 8 (38400 baud)
Set the drive work mode to IPos control mode.
Save the parameters and restart the drive.
SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002