Non-contact measurement with light

Kopfbild Start 960x280 VLM500 en

vlm lengthoffset deVLM 500 – Comfortable distance set up of two light barriers

The latest revision of the firmware of the newest VLM generation comes with an additional parameter. Now it is possible to add an offset value to the optical noncontact measured length with a simple command called “LENGTHOFFSET”. In this manner the distance of two light barriers can be programmed directly with the help of the VLMTool. This can be done with a command input or with the parameter mask. So far an input of the light barrier distance was only possible by formatting the text output. The text output is used by the digital interfaces (USB, RS232/RS422/RS485 or Fieldbus) of the VLM500. In order to be compatible to older software revisions it is still possible to format the text output. In contrast to older models two light barriers can be connected directly to the VLM500. The 24V power supply comes from the VLM. This reduces the cable work for the customer. To adjust the new parameter comfortable with the VLMTool an update is recommended. Both device firmware and VLMTool can be downloaded from the ASTECH website under

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