SEW-Eurodrive DFE24B EtherCAT - Controlling MOVITRAC B Frequency Inverter (Gateway)

Manual – Fieldbus Interface DFE24B EtherCAT®
43
6
Controlling the MOVITRAC
®
B frequency inverter (gateway)
Operating Behavior on EtherCAT
®
6.2 Controlling the MOVITRAC
®
B frequency inverter (gateway)
The frequency inverters connected to the gateway are controlled via the process data
channel, which is up to 3 I/O words long for each inverter. When using an EtherCAT
®
master, the process data words are directly mapped in the process image and can so
be addressed directly by the control program.
PO = process output data / PI = process input data
The 24 process input and output data words in the PDO are transmitted from the gate-
way to up to 8 inverters connected via SBus as follows:
• Words 1, 2 and 3 to the inverter with the lowest SBus address (e.g. 1)
• Words 4, 5 and 6 to the inverter with the next highest SBus address (e.g. 2)
• ....
If fewer than 8 frequency inverters are connected to the gateway, the upper words in the
PDO have no significance - they are not transmitted.
6800525835
Unit = SBus-Address: 1 2 3 4 5 6 7 8
EURODRIVEEURODRIVE
EURODRIVE
MOVITRAC
®
B
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EURODRIVE
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EURODRIVE
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EtherCAT
Master
EtherCAT
acycl. Mailbox
Communication
cycl. InputData1
(Standard 24 PI)
acycl. Mailbox
cycl. OutputData1
(Standard 24 PO)
Ethernet
Header
Frame
Header
EtherCAT
Header
Data ... FCS
Drive
Communication
01
F1
EtherCAT
AS
RUN
DFE 24B
ERR
INX30OUTX31
OUTX31
INFORMATION
For more information about control via the process data channel, in particular regard-
ing the coding of the control and status word, refer to the "MOVITRAC
®
B Communi-
cation and Fieldbus Unit Profile" manual