Display monitor for multi-optical-path photoelectric safety apparatus and multi-optical-path photoelectric safety apparatus including a display monitor

A display monitor for a multi-optical-path photoelectric safety apparatus having a plurality of multi-optical-path photoelectric sensor units, each of the multi-optical-path photoelectric sensor units includes a light emitter comprising a plurality of light emission elements and a light receiver having a corresponding number of light reception elements as the plurality of light emission elements, the multi-optical-path photoelectric safety apparatus having a special function that can be set for each optical path of each unit, said display monitor comprising:

• a light incidence/light block status indicator lamp group including a plurality of indicator lamps each indicating a light incidence/light block state for each of the optical paths in one of optical path areas into which the optical paths in the multi-optical-path photoelectric safety apparatus are grouped;
• a mode state indicator lamp group having a corresponding number of indicator lamps as the plurality of indicator lamps of the light incidence/light block status indicator lamp group for displaying a setup state of the special function for each of the optical paths in the optical path area;
• a first selection section for selecting the unit to be displayed on the light incidence/light block status indicator lamp group and the mode state indicator lamp group from among the plurality of multi-optical-path photoelectric sensor units;
• a first group of indicator lamps for displaying the unit selected by using the first selection section;
• a second selection section for selecting the optical path area;
• a second group of indicator lamps for displaying the optical path area selected by using the second selection section;
• a third selection section for selecting the special function to be displayed on said display monitor;
• and
• a third group of indicator lamps for displaying the special function selected by using the third selection section.

A multi-optical-path photoelectric safety apparatus comprising:

• a multi-optical-path photoelectric sensor unit having a light emitter comprising a plurality of light emission elements and a light receiver comprising a corresponding number of light reception elements as the plurality of light emission elements in the light emitter, the light emission elements and the light reception elements forming a plurality of optical paths;
• and
• a control unit with a display monitor for receiving light incidence/light block information for each optical path from the multi-optical-path photoelectric sensor unit and displaying the light incidence/light block information for each optical path on the display monitor, said display monitor including:
• a first display section having a plurality of indicator lamps each that indicate a light incidence/light block status condition for each of the optical paths;
• and
• a first switch section for selecting an optical path area from among optical path areas into which the plurality of optical paths are grouped with the number of the indicator lamps of the first display section,
• wherein the optical path area is selected by operating the first switch section and information concerning light incidence/light block status condition of the optical paths in the selected optical path area is displayed on the first display section.

A display monitor for a multi-optical-path photoelectric safety apparatus having a multi-optical-path photoelectric sensor unit that includes a light emitter comprising a plurality of light emission elements and a light receiver having a corresponding number of light reception elements as the plurality of light emission elements, the light emission elements and the light reception elements forming a plurality of optical paths, said display monitor comprising:

• first display means having a plurality of indicator lamps that indicate a light incidence/light block status condition for each of the plurality of optical paths;
• and
• first switch means for selecting an optical path area from among optical path areas into which the plurality of optical paths are grouped with the number of the indicator lamps of the first display means,
• wherein the optical path area is selected by operating the first switch means and information concerning the light incidence/light block status condition of the optical paths in the selected optical path area is displayed on the first display means.