Control Via Additional Fieldbuses; Modbus Rtu - Siemens SINAMICS G120 Operating Instructions Manual

6.2.11

Control via additional fieldbuses

6.2.11.1

Modbus RTU

Settings for Modbus RTU
Parameter
p2020
p2021
p2024
r2029
p2030 = 2
p2031
p2040
Converter with CU230P-2 Control Units
Operating Instructions, 04/2015, FW V4.7 SP3, A5E34257946B AB
Explanation
Fieldbus interface baudrate
(Factory setting: 7)
Fieldbus interface address (Factory setting: 1)
Valid USS addresses: 1 ... 247.
The parameter is only active if address 0 is set at the Control Unit address switch.
A change only becomes effective after the inverter power supply has been switched
off and switched on again.
Fieldbus interface times
(Factory setting: [0] 1000 ms,
[2] 0 ms)
Fieldbus interface error sta-
tistics
Fieldbus interface protocol selection: Modbus RTU
Fieldbus interface Modbus
parity (Factory setting: 2)
Fieldbus interface monitoring time (Factory setting: 100 ms)
p2040 = 0: The monitoring is deactivated
5: 4800 baud
6: 9600 baud
7: 19200 baud
8: 38400 baud
9: 57600 baud
[0] Maximum permissible telegram processing time of
the Modbus slave
[2] dead time between two telegrams
[0] number of error-free
telegrams
[1] number of rejected
telegrams
[2] number of framing
errors
[3] number of overrun
errors
0: No parity
1: Odd parity
2: Even parity
Advanced commissioning
6.2 Inverter control
10: 76800 baud
11: 93750 baud
12: 115200 baud
13: 187500 baud
[4] number of parity errors
[5] number of starting
character errors
[6] number of checksum
errors
[7] number of length er-
rors
189