Siemens SINAMICS V90 Operating Instructions Manual page 215

Description
⑩
Write the control word via PLC.
⑪
Write the setpoint and read the status word via PLC.
Example 1
This example shows the operating procedures when we use the setpoint and control word
from Modbus (p29008 = 1) as the Modbus control source in S control mode.
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SINAMICS V90, SIMOTICS S-1FL6
Operating Instructions, 09/2016, A5E36037884-002
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 S control mode.
Save the parameters and restart the drive.
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).
Note:
Bit 10 of the register 40100 must be set to 1 to allow the PLC
to control the drive.
You need to trigger a rise edge for OFF1 to enable SON sta-
tus for the motor, and OFF2 and OFF3 must be set to 1. The
step must be executed when you enable SON for the first
time.
Control functions
7.7 Communicating with the PLC
Comment
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