ABB ACS355 series User Manual page 314

314 Fieldbus control with embedded fieldbus
The pin configuration of the RS-232 connector is shown below.The maximum length
of the communication cable with RS-232 is restricted to 3 meters (9.8 ft).
PC RS-232
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
RI
Shield housing
Drive
The drive can be set to receive all of its control information through the fieldbus
interface, or the control can be distributed between the fieldbus interface and other
available sources, for example, digital and analog inputs.
1
2
3
4
5
6
7
8
9
1)
RS-232
panel connector
X3
FMBA-01
Modbus adapter
Data flow
Control word (CW)
References
Status word (SW)
Actual values
Parameter R/W
requests/responses
Drive
RJ-45
1
2
3
4
5
6
7
8
Fieldbus controller
Fieldbus
Other
devices
1)
1)
Embedded fieldbus
EIA-485
(Modbus) connection is
X1
either RS-232 or EIA-485.
Process I/O (cyclic)
Service messages (acyclic)