Door operating system with programmed control unit

Apparatus for the control of the operation of an automatic door, comprising:

• a door control unit comprising a microcomputer circuit including a door control program stored in a first non-volatile memory and responsive to sensor signals supplied thereto by sensor units and operating parameter values stored in a second non-volatile, read/write memory for controlling the opening and closing of an automatic door in response to said sensor signals and using door control parameters represented by said operating parameter values;
• said micro-computer circuit further including a communications interface and said control program further including instructions for communicating with a programming unit for receiving command signals therefrom and for storing parameter values in said second memory in response to said command signals and program instructions for generating parameter value signals representative of said stored parameter values and supplying said parameter value signals to said communication interface;
• and
• a programming unit arranged to be connected to said communications interface of said control unit for supplying said command signals thereto, said programming unit including a second microcomputer, a keyboard and a display, said second microcomputer including a second control program for generating said command signals in response to entries on said keyboard and for displaying parameter values on said display in response to parameter value signals received from said door control unit via said communications interface unit, said command signals representing operating parameter values to be stored in said non-volatile read/write memory in said door control unit, said second control program limiting the range of said parameter values according to a level of authority represented by said second control program.