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KT 8 CAN – the contrast scanner that can do more
Waldkirch, April 2005 – Parameter administration and downloads, process reporting in line with the CFR21 Part 11, online diagnosis and remote maintenance – the new KT 8 CAN can do more than just detect contrasts. Sensor integration into a machine controller is now possible via the CAN interface. However, in addition to process integration and greater user convenience the KT 8 CAN also offers important functional improvements, including autonomous switching threshold drift correction, automatic dazzle adaptation during print mark detection on foils, and a bar display for visualisation and adjustment of signal quality.

Technically, the KT 8 CAN meets modern detection reliability and operation requirements. The device uses a three-colour LED that automatically transmits the spectral range that generates the best contrast values. With its automatic drift correction and dazzle adaptation, the KT 8 CAN offers two further features that are of decisive importance for reliable contrast mark detection with a high repeatability accuracy. Moreover, during both commissioning and operation, operators can read out the detection quality from the new bar display on the device and, if necessary, make readjustments. The even quicker response time of the KT 8 CAN also permits use of the high-end sensor in powerful high-speed machines.

CAN integration for active communication with the machine

With its CAN interface, the KT 8 CAN is an integrated participant in the communication networks of intelligent machines. Thus any number of parameter sets (i.e. taught-in sensor settings) for differing packagings, for example, can be stored in the machine controller and transferred to the sensor when required.

When a new material is to be used, the teach-in process can be activated and the settings in the parameter library can be added at the controller. At the same time, e.g. in the pharmaceutical industry, this process allows simplified but nevertheless CFR21 Part 11-compliant process reporting, as the sensor setting need no longer be recorded in writing, but in the form of reproducible parameter sets stored directly in the machine’s automation system. In addition, one can “look into” the sensor from the controller (or even via a modem or the Internet) via the CAN interface, e.g. to check contamination or the current switching threshold, or for diagnosis on receipt of an error message. Thus the CAN connection assists in reducing equipping times, recognising critical sensor states in good time, facilitating preventive service measures and, if the worst comes to the worst, rapidly and efficiently correcting a fault.

The red, green and blue components of the target objects can be transmitted via the interface, and are thus available to the controller for evaluation purposes.