<p>The method involves comparing a production program from a configuration data in a set of data memories (7a-7c) and a control value by a set of microcomputers (5a-5c). The verification code is transmitted from the microcomputers to output devices (12a-12c) over a set of transmission links (11a-11c). The configuration data stored in the data memories is utilized for running an operating program on the microcomputers to control machines (3a-3c). A release signal is produced by input devices (10a-10c) and transmitted to microprocessors (6a-6c) over another set of transmission links (9a-9c).</p>
