Siemens CU240B-2 - Control Via Additional Fieldbuses; Modbus RTU

Advanced commissioning
6.2 Inverter control
Converter with the CU240B-2 and CU240E-2 Control Units
210 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
6.2.11
Control via additional fieldbuses
6.2.11.1
Modbus RTU
Settings for Modbus RTU
Parameter
Explanation
p2020
Fieldbus interface baudrate
(Factory setting: 7)
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
p2021
Fieldbus interface address
(Factory setting: 1)
Valid 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.
p2024
Fieldbus interface times
(Factory setting: [0] 1000 ms,
[2] 0 ms)
[0] Maximum permissible telegram processing time of
the Modbus slave
[2] dead time between two telegrams
r2029
Fieldbus interface error sta-
tistics
[0] number of error-free
telegrams
[1] number of rejected
telegrams
[2] number of framing
errors
[3] number of overrun
errors
[4] number of parity errors
[5] number of starting
character errors
[6] number of checksum
errors
[7] number of length er-
rors
p2030 = 2
Fieldbus interface protocol selection: Modbus RTU
p2031
Fieldbus interface Modbus
parity
(Factory setting: 2)
0: No parity
1: Odd parity
2: Even parity
p2040
Fieldbus interface monitoring time
(Factory setting: 100 ms)
p2040 = 0: The monitoring is deactivated