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82 Program features
Communication
The communication between the controller and the drive consists of data sets of
three 16-bit words each. The controller sends a data set to the drive, which returns
the next data set to the controller.
The communication uses data sets 10...33. The contents of the data sets are freely
configurable, but data set 10 typically contains the control word and one or two
references, while data set 11 returns the status word and selected actual values.
For ModuleBus communication, the ACS880 can be set up as a "standard drive"
or an "engineered drive" by parameter 60.50. ModuleBus communication uses
data sets 1...4 with a "standard drive" and data sets 10...33 with an "engineered
drive".
The word that is defined as the control word is internally connected to the drive
logic; the coding of the bits is as presented in section
Control word (ABB Drives profile) (page
word is as shown in section
profile) (page
737).
By default, data sets 32 and 33 are dedicated for the mailbox service, which enables
the setting or inquiry of parameter values as follows:
Controller
Parameter write to drive
Transmit address
Value = 4865*
Transmit data
Value = 1234
Transmit addrss
feedback
Value = 4865*
Parameter read from drive
Inquire address
Value = 6147**
Inquire data
Value = 4300
Inquire address
feedback
Value = 6147**
*19.01 → 13h.01h → 1301h = 4865
**24.03 → 18h.03h → 1803h = 6147
735). Likewise, the coding of the status
Contents of the fieldbus Status word (ABB Drives
Data set
32.1
Data set
32.2
Data set
33.1
Data set
32.3
Data set
33.2
Data set
33.3
Contents of the fieldbus
ACS880
Par.
Value
19.01
1234
1
.
.
24.03
4300
.
.
.
.
.
.
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