Siemens SIMOTICS S-1FL6 - Page 276

Control functions
7.8 Communicating with the PLC
SINAMICS V90, SIMOTICS S-1FL6
274 Operating Instructions, 04/2019, A5E36037884-007
10.
Write the speed setpoint via the register 40101.
Note:
You can calculate the actual speed value with the scale factor. Value 0x4000 r
epre-
sents the value of 100% × motor rated speed. Therefore, 0x2000 represents half of
the motor rated speed.
Example 2
This example shows the operating procedures when no control word (p29008 = 2) is used in
S control mode.
1.
Set RS485 bus address for t
he drive.
•
p29004 = 1
2.
Select the Modbus protocol by p29007.
•
p29007 = 2
3.
Select Modbus control source by p29008.
•
p29008 = 2
4.
Set the transmission baud rate by p29009.
•
p29009 = 8 (38400 baud)
5.
Set the drive work mode to S control mode.
6.
Save the parameters and restart the drive.
7.
Configure the PLC parameters.
Note:
Keep the PLC baud rate the same as the drive setting.
Set even parity check for the PLC (parity = 2).