Siemens SINAMICS V90 - Page 140

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140 Operating Manual, 04/2017, A5E36618042-003
5.
Configure the PLC parameters.
Note:
Keep the PLC baud rate the same as the drive setting.
Set even parity check for the PLC.
6.
Set a way for PLC to send the message to slaves.
Note:
For broadc
ast mode, you need to set the slave address to 0 on the PLC side.
For unicast mode, you need to set the desired target slave address on the PLC side.
For example, if you want to send the message to slave 1, you need to set the slave
address to 1 on the PLC side.
7.
Write the control word via the PLC.
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 status for the motor, and OFF2
and OFF3 must be set to 1. The s
tep must be executed when you enable SON for the
first time.
8.
Write the setpoint and read the status word via PLC.
Example
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.
1.
Set RS485 bus address for the drive.
•
p29004 = 1
2.
Select the Modbus protocol by p29007.
•
p29007 = 2
3.
Select Modbus control source by p29008.
•
p29008 = 1
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.