Typical tasks of the LUT9 IO-Link in the packaging machines segment include the detection of cutting marks on foil packaging, checking the presence and position of labels, as well as the detection of package inserts and fluorescent authenticity or security seals.
Advantages of integration via IO-Link
IO-Link technology is characterized by a standardized producer-independent protocol for exchanging data between a sensor and the IO-Link field module, from which the data is transmitted to a bus system. This allows the LUT9 IO-Link to detect and transmit not only binary information, but also comprehensive peripheral and service data from the plant’s surroundings without a separate bus system or additional cable. Whereby the data is transmitted via the cable that is anyway present, so that no extra costs for wiring or shielded cables arise. Another advantage regarding IO-Link, for packaging machine producers for example, is that the concept is compatible with switching and connection technology not originally designed for IO-Link. As a result, both standard and IO-Link sensors can be used in a machine within the same communication topology. Thus IO-Link is ideal as a technology for equipping new plants – because it can be integrated without major effort.
The LUT9 IO-Link can be parameterized via the controller, and the luminophore marks to be detected can be taught-in. This allows adjustment of the sensor with little effort, even after mounting in a difficult-to-reach location in the packaging machine. During operation, connection via IO-Link (with its transmission of operating and peripheral data) and the availability of a variety of filters (for cutting out background luminescence) ensure a high level of process reliability. The sensor’s continuous signaling of the intensity of the luminescence helps, for example, check the application of fluorescent ink and, if necessary, initiate replacement of the ink cartridge. Potential interfering effects, e.g. contamination on the sensor optics, can also be detected in good time via IO-Link and preventively corrected (i.e. without an unplanned packaging machine problem).
Error-free and versatile
The LUT9 IO-Link is a very reliable and versatile sensor regarding the detection of fluorescent objects or marks. The device emits UV transmission light during its inspections. If an object with an invisible luminophore (e.g. a label or a package insert) is present within the sensor’s field of view, the fluorescent material is excited and it emits long-wave light in the visible spectrum that is optically detected by the LUT9 IO-Link, triggering transmission of a switching signal. The long scanning distance of up to 250 mm often means that no mechanical height adjustment of the sensor is necessary when there is a change of product. Teach-in of the sensor during commissioning takes place easily and rapidly via 2-point teach-in or dynamic teach-in directly on the device, or using IO-Link via the controller. Visualization of luminescent intensity is also user-friendly: it is displayed using a bar graph on the device as well as on the machine’s control panel. Depending on the packaging process, the sensor offers three operating modes: high resolution with 500 Hz, 2.5 kHz switching frequency for standard applications, and 6.5 kHz for rapid packaging applications. Whether checking the alignment of bottles during transport, detecting decorative or content labels, checking pharmaceutical packaging for the presence of package inserts, or inspecting authenticity marks, the LUT9 IO-Link combines maximum sensor performance, flexibility and automation benefits for improved availability of packaging plants.