Method of updating program in stored program control unit, and stored control program unit

摘要

The present invention relates generally to the updating of control programs using the Internet. More particularly techniques are provided for the automatic and safe updating of a control program in a stored control program unit of a computer system.. A specific embodiment provides security and reduces the cost of updating a control program by first, executing the instruction to update the control program using a first connection, for example a public telephone line, and then using a second connection via the Internet to download the update to the control program. <IMAGE>