Manual – Fieldbus Interface DFE24B EtherCAT®
37
5
Configuration of the EtherCAT
®
master for MOVITRAC
®
B/gateway with
Project Planning and Startup
5.3.4 Auto-setup for gateway operation
The auto setup function can be used to startup DFE24B as a gateway without a PC. The
function is activated using the "AS" (auto setup) DIP switch.
First, the DFE24B searches on the lower-level SBus for drive inverters. This process is
indicated by the LED H1 (system error) flashing briefly. For this purpose, different SBus
addresses must be set for the drive inverters (P881). We recommend assigning the ad-
dresses beginning with address 1 in ascending order based on the arrangement of in-
verters in the control cabinet. The process image on the fieldbus side is expanded by
three words for each detected drive inverter.
The H1 LED remains lit if no drive inverter was located. A total of up to eight drive invert-
ers is taken into account.
After the search is completed, the DFE24B cyclically exchanges 3 process data words
with each connected drive inverter. The process output data are read from the fieldbus,
divided into blocks of three and transmitted. The drive inverters read the process input
data, put them together and send them to the fieldbus master.
The cycle time of SBus communication is 2 ms per station.
Thus, for an application with 8 inverters on the SBus, the cycle time of the process data
update is then 8 x 2 ms = 16 ms.
3E2B.0hex
(15915.0dec)
30.0 PI16 Drive 6 PI1 UINT 2
3E2C.0hex
(15916.0dec)
32.0 PI17 Drive 6 PI2
3E2D.0hex
(15917.0dec)
34.0 PI18 Drive 6 PI3
3E2E.0hex
(15918.0dec)
36.0 PI19 Drive 7 PI1
3E2F.0hex
(15919.0dec)
38.0 PI20 Drive 7 PI2
3E30.0hex
(15920.0dec)
40.0 PI21 Drive 7 PI3
3E31.0hex
(15921.0dec)
42.0 PI22 Drive 8 PI1
3E32.0hex
(15922.0dec)
44.0 PI23 Drive 8 PI2
3E33.0hex
(15923.0dec)
46.0 PI24 Drive 8 PI3
Index.Subindex Offset in the PDO Name Assignment Data type Size in bytes
INFORMATION
Switching on the "AS" (auto setup) DIP switch causes the function to be performed
once. The "AS" DIP switch must then remain in the ON position. The function can
be performed again by switching the DIP switch off and back on again.
INFORMATION
If you change the process data assignment of the drive inverters connected to
DFE24B, you must activate Auto-Setup again because the DFE24B saves these val-
ues only once during Auto-Setup. At the same time, the process data assignments of
the connected drive inverters may not be changed dynamically after Auto-Setup.
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