System for transmitting data between a device data area and a variable data area of a memory according to a memory map based on an identifying data of a device detected

An extension board to be connected to a controller controlling a device connected to said controller;

• said extension board comprising:
• device detecting means for detecting a device connected to said controller and obtaining device identifying data on the detected device;
• memory map setting means for setting a device data area on memory means inside said controller, based on the obtained device identifying data, for transmitting and receiving data to and from said device and producing a memory map which correlates said device data area with a variable data area on said memory correlated to said device;
• and
• data transmitting means for transmitting data according to said memory map between said variable data area on said memory means and said device data area.

A communication unit for communicating with a device connected to and controlled by a controller containing a memory means;

• said communication unit comprising:
• device detecting means for detecting said device connected to said controller and obtaining device identifying data on the detected device;
• memory map setting means for setting a device data area on said memory means, based on the obtained device identifying data, transmitting and receiving data to and from said device and producing a memory map which correlates said device data area with a variable data area on said memory correlated to said device;
• communicating means for periodically transmitting and receiving data to and from said device in a data linking format according to said memory map by using said device data area on said memory means;
• and
• data transmitting means for transmitting data according to said memory map between said variable data area on said memory means and said device data area.