ABB ACH550-UH User Manual page 264

1-260
Details for the ABB Drives profile (which apply for all protocols) are provided in
drives profile technical data
Control interface
In general, the basic control interface between the fieldbus system and the drive
consists of:
• Output Words:
–
–
– Others: The drive supports a maximum of 15 output words. Protocols limits
• Input Words:
–
– Actual Value (speed or frequency)
– Others: The drive supports a maximum of 15 input words. Protocols limits may
Note: The words "output" and "input" are used as seen from the fieldbus controller
point of view. For example an output describes data flow from the fieldbus controller
to the drive and appears as an input from the drive point of view.
The meanings of the controller interface words are not restricted by the ACH550.
However, the profile used may set particular meanings.
Process I/O
(cyclic)
Service
Messages
(Acyclic)
Control Word
The
CONTROL WORD
system. The fieldbus controller sends the
switches between states according to the bit-coded instructions in the
WORD
• The drive is in remote (REM) control.
Fieldbus adapter
CONTROL WORD
(speed or frequency)
REFERENCE
may further restrict the total.
STATUS WORD
further restrict the total.
Fieldbus Controller
Fieldbus
Control Word (CW)
References
Status Word (SW)
Actual Values
Parameter R/W Requests/Responses
is the principal means for controlling the drive from a fieldbus
. Using the
CONTROL WORD
on page 1-269.
CONTROL WORD
requires that:
ACH550-UH User's Manual
ABB
to the drive. The drive
CONTROL