Siemens SIMATIC S7-1200 System Manual page 1165

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10. Set the baud rate of the RS485 serial interface:

11. Enter the Slave address.

Each drive (a maximum of 31) can be operated over the bus.

12. Set the serial link timeout.

This is the maximum permissible period between two incoming data tele-

grams. This feature is used to turn off the inverter in the event of a communi-

cations failure. Timing starts after a valid data telegram has been received. If

a further data telegram is not received within the specified time period, the

inverter will trip and display fault code F0070. Setting the value to zero

switches off the control.

13. Transfer the data from RAM to EEPROM:

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK

Communication processor and Modbus TCP

13.4 Universal serial interface (USS) communication

P2010 Index 0= 4 (2400 baud)

5 (4800 baud)

6 (9600 baud)

7 (19200 baud

8 (38400 baud)

9 (57600 baud)

12 (115200 baud)

P2011 Index 0=(0 to 31)

P2014 Index 0=(0 to 65,535 ms)

0=timeout disabled

P0971=1 (Start transfer) Save the changes

to the parameter settings to EEPROM