Project Module > Project parameters (detailed description) > Item designations 2 tab > Composition of item designations > Separator character independent item designations

Figure 401: The "Composition of item designations" section for separator character independent item designations

Composition of separator character independent item designations is defined in a different way than the composition of ordinary item designations (dependent). The first thing you will notice when you activate them, is that the composition is divided in two levels, where the designation part is composed separately. Therefore, each item designation type will have two compositions instead of one. The first one is called General composition and is displayed to the left. The second one is called Composition of the designation part and is displayed to the right. Please refer to the figure above.

When using separator character independent item designations, each available part in the first level, displayed to the left, is tied to its respective attribute, meaning that the content is fetched from a specific attribute for each part. This makes the whole system independent of separator characters.

As mentioned, there are four different types of item designations, three of which are handled in the Item designations 2 tab. The table below lists and explains them.

Device type	Explanation	Composition defined in
Conventional devices	A device that is not a PLC, a cable, a terminal or a connector, is regarded as a conventional device.	Item designations 2 tab
PLC	PLC's	Item designations 2 tab
Cables	Cables	Item designations 2 tab
Terminals	Terminals and connectors	Item designations 3 tab

The compositions of the three device types that are handled in the Item designations 2 tab are almost identical, as you can see in the figure above. You adjust the composition for each type according to the description in the Editing compositions for item designations topic.

The only difference between the device types that you can see directly, is that you have a check-box called Synchronise separator character with conventional devices for PLC and Cables, but for natural reasons not for Conventional devices. That check-box is explained in full detail in a separate sub-topic with the same name. You reach it with the link above.

There are however some practical differences. You can read about them in a separate sub-topic named Differences between Conventional devices, PLC's and Cables.

The corresponding composition for terminals is handled in the Item designations 3 tab.

•Terminals

As mentioned above, the composition is defined in two levels. Those two levels are described in separate sub-topics that are listed below, with convenient links to both.

•General composition

•Composition of the designation part