Description
3.3 Accessories
Installation and Operating Instructions SINAMICS G180
Operating Instructions, 02/2019, 4BS0751-007
61
Table 3- 6
Modbus board - external elements
component
Function
LED "Status Hardware
Settings"
Red, lit
DIL switches are set to "not active" status (all set to "off" or im-
permissible values)
Green, lit
DIL switch settings changed by software.
OFF
DIL switch settings are used and are OK.
LED "Bus ready"
Green, lit
bus OK, normal operation
Red, lit
Bus error, timeout
OFF
Board has not been correctly initialized
LED "Processing"
Flashing green
Board receives a request and produces a response
OFF
Board is not currently processing any requests
LED "Bus error"
Red, lit
Bus error
OFF
Normal operation or circuit board not initialized
Modbus connection
Sub-D female connector for Modbus
Switch for terminating
resistor
A bus line must be terminated with a terminating resistor. A terminating resistor can be fitted in
the connector. Select the switch position accordingly. Switch up = resistor On
Available Modbus ad-
dresses
You can set the Modbus address using the software as follows:
Under "P-INTERFACES/P-fieldbus/P-PB/PN/Modbus/P-Modbus RTU/BUS address", a value
0 … 247 can be set.
The address is set by the hardware if you enter a value of 0. In this case, set a binary address
from 1 to 127 with the DIL switches. (Switch 1 is MSB, switch 7 is LSB)
Configurable baud rate
You can set the baud rate using the software under
"P-INTERFACES/P-fieldbus/P-PB/PN/Modbus/P-Modbus RTU/baud rate".
If you enter a value of 0 under
"P-INTERFACES/P-fieldbus/P-PB/PN/Modbus/P-Modbus RTU/BUS-address", then the baud
rate is set by the hardware. Set the binary baud rate according to the following list:
•
000: not available
•
001: 1200
•
010: 2400
•
011: 4800
•
100: 9600
•
101: 19,200 (standard for RTU)
•
110: 38.400
•
111: 57.600