ABB ACS355 User Manual page 302

302 Fieldbus control with embedded fieldbus
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, eg digital and analog inputs.
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
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)