Assignment of the connections

This chapter describes the assignment of the EtherCAT connections of an EP9224-2037 to their representation in TwinCAT. This assignment is required to correctly map an EtherCAT network in TwinCAT "offline" configuration.

An EP9224-2037 is represented by two I/O modules in the TwinCAT I/O tree:

Assignment of the connections 1:

Each I/O module has four ports. Some ports represent the EtherCAT connections, while others represent internal interfaces. The following table shows the assignment of the EtherCAT connections to the ports of the I/O modules in TwinCAT:

EtherCAT connection

I/O module in TwinCAT

Port

X40

Assignment of the connections 2: EP9224-3037

D

X41

B

X42

C

X43

Assignment of the connections 3: EP9224-2037

B

X70

A

X71

C

Below you will find examples of how to use the table.

Example: Appending an EtherCAT Box to EP9224-2037

Requirement: an EP9224-2037 is appended in the I/O tree in TwinCAT.
1. Decide to which connector of the EP9224-2037 the EtherCAT Box is to be connected.
(e.g. to X42)
2. Determine the corresponding I/O module and port with the help of the table.
(e.g. EP9224-3037, Port C)
3. In the I/O tree, right-click on the determined I/O module.
(e.g. EP9224-3037)
4. Click the menu item Add new Item…
5. In the window that appears select the EtherCAT Box to be added and the previously determined port.
(e.g. EP1008-0001, Port C)
Assignment of the connections 4:
6. Click the OK button
Result: The Box was added at the correct position in the I/O tree.

Example: Moving an EtherCAT Box that has already been added to another connection

1. Double-click on the EtherCAT Box in the I/O tree.
(e.g. an EP1008-0001 connected to X42)
2. Click the EtherCAT tab.
3. Determine the corresponding I/O module and port of the new connector with the help of the table.
(e.g. X43 → EP9224-2037, Port B)
4. In the Previous Port drop-down list box, select the determined I/O module and the port.
(e.g. "Box 1 (EP9224-2037) - B")
Result: The EtherCAT Box is connected to the new connector.

Checking the IO configuration graphically

1. Double-click the EtherCAT master device in the IO tree.
2. Click the EtherCAT tab.
3. Click the Topology button.
Result: A graphical illustration of the network structure created in TwinCAT appears.
Move the mouse pointer over the icons of the IO modules to display their description.