Cyclic Communication - Siemens SINAMICS V90 Operating Instructions Manual

Control functions
7.7 Communicating with the PLC
7.7.2.2

Cyclic communication

Operating steps
Description
①
Configure the RS485 bus address by parameter
p29004.
②
Select the communication protocol by parameter
p29007.
③
Select the command and setpoint source by parame-
ter p29008.
④
Set the transmission baud rate by parameter p29009.
⑤
Set the monitor time for Modbus by parameter
p29019.
⑥
Set control mode for the drive by p29003.
⑦
Save the parameters and restart the drive.
⑧
Configure the PLC parameters.
⑨
Set a way for PLC sending message to slaves.
214
You can configure the slave address from 1 to 31.
p29007 = 0: No protocol
•
p29007 = 1: USS protocol
•
p29007 = 2: Modbus protocol
•
p29008 = 1: Setpoint and control word from Modbus PZD
•
p29008 = 2: No control word.
•
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
•
Sets the monitoring time to monitor the process data received
via the RS485 interface. If no process data is received within
this time, then F1910 is output.
The default vaule of p29019 is 0. If p29019 = 0, monitoring is
deactivated.
Note:
Keep the PLC baud rate the same as the drive setting.
Set even parity check for the PLC.
Note:
For broadcast 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.
Operating Instructions, 09/2016, A5E36037884-002
Comment
SINAMICS V90, SIMOTICS S-1FL6