Assignment of connectors

This chapter describes the assignment of the EPP1322-0001 connectors to their representation in TwinCAT. This assignment is required to correctly map an EtherCAT network in TwinCAT "offline" configuration.

An IO module that represents a Box in TwinCAT has four ports: A, B, C, D. Each port represents one connector. The following diagram shows the assignment of the connectors to the ports of an IO module in TwinCAT:

Assignment of connectors 1:
Connector designations

Type

Connector

Port in TwinCAT

EtherCAT input

X40

A

EtherCAT P output

X50

C

EtherCAT P output

X51

D

EtherCAT P output

X52

B

The following page contains examples of how to use the table.

Example: Attaching an EtherCAT P Box to EPP1322-0001

Requirement: An EPP1322-0001 is added to the IO tree in TwinCAT.
1. Decide to which connector the EtherCAT P Box is to be connected.
(e.g. at X52)
2. Use the table to determine the corresponding port.
(e.g. Port D)
3. Right-click EPP1322-0001 in the IO tree.
4. Click the menu item Add new Item…
5. In the window that appears select the EtherCAT P Box to be added and the previously determined port.
(e.g. EPP1008-0001, Port D)Assignment of connectors 2:
6. Click OK
Result: The Box was added at the correct position in the IO tree.

Example: Moving a previously added EtherCAT P Box to another connector

1. Double-click the EtherCAT P Box in the IO tree.
(e.g. an EPP1008-0001 that was previously connected to X52)
2. Click the EtherCAT tab.
3. Use the table to determine the port of the new connector.
(e.g. X51 → Port C)
4. In the Previous Port dropdown list box, select the junction IO module and the previously determined port.
(e.g. "Box 1 (EPP1322-0001) - C")
Result: The EtherCAT P 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.