NORD Drivesystems BU0570 - Manual (Page 16)

EtherCAT bus module for NORD frequency inverters SK 5xxE
16 Subject to technical amendments BU 0570 GB-0312
3.3.2 Addressing
No settings need to be made on the SK TU3-ECT. Addressing of the bus participants is performed
automatically by the bus master according to their physical sequence on the bus.
Second Address
In modular applications, in which entire groups of bus participants are disconnected, the control unit would
have to continuously adapt its bus configuration.
This reconfiguration can be avoided by means of the so-called "Hot Connection Group" functionality and the
DIP address ("Second Address) of the SK TU3-ECT. With this functionality, the bus module is only
accessed via the DIP address ("Second Address"). The position of the module in the EtherCAT line is
irrelevant. Configured bus modules can still be removed or added at any time without the necessity for an
adaptation in the System Manager. Therefore various configurations of the EtherCAT bus can be operated
with a single SPS project. Assignment to the SPS variables is unique and always remains in effect.
For SK TU3-ECT which support the "Hot Connection Group" functionality, there is a 12-pole DIP switch on
the rear of the module for manual setting of the "Second Address". The address which is set there is
adopted when the bus module is switched on (Power On) and can therefore be used by the master. The
address which is set can be read out via the parameter P181.
Table 9 Addressing via the DIP switch on the SK TU3-ECT module
The following steps are necessary for settings in the TwinCAT System Manager:
 Highlight the SK TU3-ECT and select "Add to Hot Connection Groups" using the right-hand mouse
button.
 In the dialogue which opens, select "2. Address" and enter the DIP address (P181).
 Finish
ATTENTION
Devices without "Second Address" functionality must always be physically located at the
start of the bus. A device without this functionality may not follow a device with "Second
Address" functionality in the EtherCAT bus line.
DIP switches
12 11 10 9 8 7 6 5 4 3 2 1 Address
0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 1 1
0 0 0 0 0 0 0 0 0 0 1 0 2
- - - - - - - - - - - - -
1 1 1 1 1 1 1 1 1 1 1 1 4095