Installation for manufacturing differing mineral fibre products including manual controls for varying stored control signals

An installation for the continuous manufacture of differing mineral fiber products, comprising:

• plural control elements each for controlling a parameter of a product;
• plural reference value adjusting devices each for producing a control signal to be applied to one of said control elements associated with the adjusting devices;
• a memory for commonly storing control signals associated with each product, wherein the control signals associated with each product and stored in said memory are accessed by means of a common address for common retrieval of the control signals associated with each product;
• and
• plural manually operable correcting devices for making fine adjustments within pre-established limits to the control signals retrieved from said memory without modification of the stored control signals, thereby to control the quality of each product primarily based on the stored control signals, as finely adjusted by the manually operable correcting devices;
• a central processing unit for controlling application of retrieved control signals to said control elements;
• and
• switching means disposed between said central processing unit and said memory and said reference value adjusting devices for switching over from a manual operation mode to an automatic operation mode wherein control signals applied to said control elements are derived from said memory instead of said reference value adjusting devices, comprising
• means for switching an input line to said central processing unit from one of said reference value adjusting devices to one of said correcting devices when said switching means switches over to said automatic operation mode such that said central processing unit receives a correcting signal from said correcting device, modifies a corresponding retrieved control signal received from said memory based on the received correcting signal, and applies the modified control signal to a control element associated with the modified control signal.