Identifiers

In IMMS, there are a number of different things which are identified through external identification, which in everyday practice is typically carried out by reading a label containing an RFID chip and/or a barcode. This revolves around the following kinds of things: items, transport units, locations (depending on their usage type), and chutes.


Items

The items are always identified by an Item ID that IMMS receives from the LMS. If an item needs a new Item ID, it must therefore be changed in the LMS, which then notifies IMMS about the change.

If IMMS is notified by the LMS that an item has changed Item ID, the old Item ID may then be reused for another item.


Transport units, locations, and chutes

Transport units, locations, and chutes may be created in IMMS without an associated label. Later, you can link them with a label either via the mobile client’s “Attach new label to...” function or the web client’s functions for editing the details of the three types of data.

For all three types of data, even if the identification is changed or deleted, the prior identification will still remain in the system and can be used to identify the original item. Therefore, it is not possible to reuse an identifier for another item. This principle is necessary since registrations - especially from the mobile clients - may be received late but are still able to be processed correctly even though the item has changed identity in the meantime.

Since an identifier that has already been used once remains active, IMMS does not permit an identifier to be reused for another item. The system will actively prevent this from happening.


Interpretation of data in barcodes and RFID chips

The 4 types of things mentioned above are identified via identifiers, which when viewed from the web client, are completely unrelated. A specific installation of IMMS is configured to support a specific way of distinguishing the 4 types from each other. This configuration can be adapted to accommodate identifiers already in use, but otherwise one of these two schemes are suggested:

Note: RFID chips and barcodes that based on the chosen scheme do not identify either a transport unit, a location, or a chute, identify an item. There are no further restrictions on Item-ID's.

Coding in the physical RFID chips and barcodes

IMMS supports one of two different encoding schemes for RFID chips:

A wide range of barcodes is supported, both 1D (e.g. Code-39 and Code-128) and 2D (e.g. QR Code and Data Matrix).