All SIMATIC MV440 stationary code readers are basic units under the terms of "Text-Genius" license. The text recognition functionality is enabled by transferring the license key from the USB flash drive on which it is supplied to the MV440 code reader by means of SIMATIC License Manager.

If a light source is used from the range of accessories of SIMATIC MV440, the MV440 must be configured accordingly and text recognition must be started by triggering the reader. The measurement result is output immediately after measurement on the predefined process interface. Special sources of light can be used at any time. Their connection is described in the chapter "MV440". A decisive factor in the selection of lighting is the required homogeneity of the illumination and contrast obtained.