NetId Management tab
 | Address conflict All changes to AmsNetIds must not result in two or more identical AmsNetIds within a system. Two AmsNetIds representing the same address are identical even if one is defined absolutely and the other relatively. |
Local NetId | AmsNetId of the local system |
Change | Change the local AmsNetId. |
Target NetId | AmsNetId of the target system If the local system has been selected as the target system, then the "Local" entry indicates that the "Target NetId" matches the AmsNetId of the local system. |
Project NetIds | Lists the AmsNetIds of the projected I/O devices. If an entry is selected in the "Project NetIds" table, then the Change Project NetId button becomes active. |
NetId | AmsNetId of the device listed in the respective table row |
Owner | Name of the device to which the AmsNetId in the respective table row belongs. |
Type | Type of the device to which the AmsNetId in the respective table row belongs. |
Use Relative NetIds | Converts AmsNetIds to relative AmsNetIds In order for an AmsNetId to be converted to a relative AmsNetId, the first four numbers of an AmsNetId must match the first four numbers of the "Target NetId". For the AmsNetIds listed in the table column "NetId" for which this match is fulfilled, if the checkbox Use Relative NetIds is checked, the respective first four numbers are combined into a group. This related group is identified by being enclosed in square brackets. Also in the Project Routes tab, AmsNetIds are recognizable as relative NetIds by the fact that square brackets enclose the first four numbers. The square bracket surrounding the first four numbers of a relative NetId means that these numbers are set equal to the first four numbers of the Target NetID. In this way, addressing is based on the fifth and sixth numbers relative to the "Target NetId". For a configured I/O device, the first four numbers of a relative NetId are internally represented as zero. For example, the relative NetId [172.17.12.1].2.1 is stored internally as 0.0.0.0.2.1. You can change an absolute AmsNetId into a relative AmsNetId for a projected I/O device in the dialog Change NetId if you set its first four numbers to the value zero. As a consequence, the AmsNetId of the corresponding projected device is displayed in the table column "NetId" and also in the Project Routes tab as relative NetId. On a local system, a NetId is registered with a local router and can be used locally. In contrast, a remote router generally does not know a NetId. It tries to find a remote computer where the first four digits of the remote computer's address match the first four digits of the projected I/O device's NetId. Therefore a changed value compared to the "Target NetId" within the first four numbers of the AmsNetId generally results in the fact that the projected I/O device cannot be addressed remotely unless all four first numbers carry the value zero internally. If one of the first four numbers has been changed from the "Target NetId" and a relative NetId has not been defined, then this AmsNetId cannot be converted to a relative "Ams NetId". The use of relative NetIds ensures that configured I/O devices are addressed with valid AmsNetIds, provided that the fifth and sixth numbers of the assigned AmsNetIds exclude ambiguities. The fifth and the sixth number of a respective relative AmsNetId must make a respective relative AmsNetId distinguishable from all other assigned relative AmsNetIds. |
Change Project NetId | Opens the Change NetId dialog to change the AmsNetId of the entry marked in the "Project NetIds" table. |
Open "Change NetId" dialog
- 1. In the Project NetIds table, select the projected device whose NetId you want to change.
- The button Change Project NetId is activated.
- 2. Click on the button Change Project NetId.
- The Change NetId dialog opens.
Alternative:
- 1. Right-click on the device in the I/O tree whose AmsNetId you want to change.
- A context menu opens.
- 2. From the context menu, select the command Change NetId....
- The Change NetId dialog opens.
- The button OK of the dialog Change NetId changes the AmsNetId and closes the dialog. The Cancel button below closes the dialog without changing the AmsNetId.