302 Fieldbus control with the embedded fieldbus
Communication profiles
The embedded fieldbus supports three communication profiles:
• DCU communication profile (DCU PROFILE)
• ABB drives limited communication profile (ABB DRV LIM)
• ABB drives full communication profile (ABB DRV FULL).
The DCU profile extends the control and status interface to 32 bits, and it is the
internal interface between the main drive application and the embedded fieldbus
environment. The ABB drives limited is based on the PROFIBUS interface. ABB
drives full profile supports two Control word bits not supported by the (ABB DRV LIM)
implementation.
ABB drives communication profile
Two implementations of the ABB drives communication profile are available: ABB
drives full and ABB drives limited. The ABB drives communication profile is active
when parameter 5305 EFB CTRL PROFILE is set to ABB DRV FULL or ABB DRV
LIM. The Control word and Status word for the profile are described below.
The ABB drives communication profiles can be used through both EXT1 and EXT2.
The Control word commands are in effect when parameter 1001 EXT1 COMMANDS
or 1002 EXT2 COMMANDS (whichever control location is active) is set to COMM.
Data conversion
Modbus
network
Embedded fieldbus
EIA-485/RS-232
Data conversion
for REF1/2
ABB drives profile
DCU profile DCU profile
DCU profile
Drive
Actual values selected
by parameter.
5310…5317
DCU PROFILE
ABB DRV LIM /
ABB DRV FULL
Control/Status word
Actual values selected
by parameter.
5310…5317
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