T_AmsPort

A variable of this type contains the ADS port number. ADS devices in the TwinCAT network are identified by an AMS network address and a port number. The following port numbers are invariably specified on every individual TwinCAT system.

TYPE T_AmsPort : UINT;
END_TYPE

Table with specified ADS port numbers:

Up to four independent PLC runtime systems (PLC projects) can run on a TwinCAT 2 system; each PLC project is to be regarded as a stand-alone PLC. The port number and the network address are both required as input parameters when the ADS blocks are called.

The ADS ports from 800 to 899 are generally available for the PLC in TwinCAT3. In order to separate TwinCAT 2 and TwinCAT 3 systems, however, we recommend using only the ports from 851 to 899.

If you set the ADS port with the help of the dialog, port 851 is displayed as the lowest port that can be set. In order to use the range 800-850, you need to type in the port number.

Proceed as follows to enter the port number via the dialog box:

To ensure separation between TwinCAT 2 and TwinCAT 3 systems, we recommend using only the ADS ports from 851 to 899. ADS ports outside the range from 800 bis 899 will not be accepted by the input system.