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PROFIBUS-DP external communication cards
POWERXL DG1 SERIES VFD
MN040010EN—September 2016 www.eaton.com
PROFIBUS—PowerXL DG1
General
Data transfer between PROFIBUS-DP master and slave
takes place via the input/output data field. The master writes
to slave’s output data and the slave answers by sending the
contents of its inputs data to master. The content of the
input/output data is defined in the device profile. The device
profile for drives is PROFIdrive.
PowerXL drive can be controlled by PROFIBUS-DP Master
using ST1 telegram of the PROFIdrive profile using the ST1
standard telegram in Drive profile mode, or using other
modules in Bypass Mode. The Modules where Process
Data values are returned can be used via the Bypass
Operation mode. When Fieldbus has been selected as the
active control place, the drive operation is controlled from
PROFIBUS-DP Master as long as PNU927 = 1 and PNU928
= 1 by default. When these bits are disabled, it only allows
monitoring values cyclic via acyclic commands.
Operation mode
The parameter Operation Mode BX.2.4 above defines how
the input/output data is handled on the option board.
PROFIdrive
Data transfer follows the document PROFIBUS Profile for
variable speed drives, PROFIdrive following the Standard
Telegram 1.
Echo
The OUTPUT data written by the Master is echoed back to
the Master in the INPUT field.
The data is not shown in the drive, but echoing is carried
out on the option board.
This mode can be used when the function of the bus
connection is tested.
Bypass
The information of the Process data field is transferred to
the application interface without handling.
The desired PPO Modules define the amount of data that
is transferred. Once drive is set in Bypass mode, it will give
the ability to set the desired PPO module.
PowerXL PROFIdrive interface
PowerXL has PROFIdrive profile 4.1, which allows—
•
Direct control of the drive using PROFIBUS Master
•
Full access to all drive parameters