398 Fieldbus control through the embedded fieldbus interface (EFB)
58.26 EFB ref1 type and 58.27 EFB ref2 type. See section About the control profiles
on page 376.
Actual values
Fieldbus actual signals (ACT1 and ACT2) are 16-bit or 32-bit signed integers. They
convey selected drive parameter values from the drive to the master. Whether the
actual values are scaled or not depends on the settings of 58.28 EFB act1 type and
58.29 EFB act2 type. See section About the control profiles on page 376.
About the control profiles
A control profile defines the rules for data transfer between the drive and the fieldbus
master, for example:
• if control word and status word are converted and how
• if signal values are scaled and how
• functionality and content of certain objects in section Object dictionary on
page 415).
You can configure the drive to receive and send messages according to one of the
four profiles:
• CiA 402
• ABB Drives
• Transparent 16
• Transparent 32
For the ABB Drives and CiA 402 profiles, the embedded fieldbus interface of the drive
converts the fieldbus data to and from the native data used in the drive. The
Transparent profiles perform no data conversion, but the Transparent 16 profile may
optionally scale the reference and actual values with a configured scaling value
(58.24 Transparent 16 scale).
CiA 402 profile
Control Word for the CiA 402 profile
Control word of the CiA 402 profile can be written to the object 6040h.
The table below shows the contents of the fieldbus Control Word for the CiA 402
control profile. The embedded fieldbus interface converts this word to the form in
which it is used in the drive.
Bit Name
0Switch on
1 Enable voltage
2 Quick stop
3 Enable operation
4...6 Operation -mode specific
To Next Page
Loading...
