Communication control apparatus

A communication control apparatus comprising:

• a central processing unit for processing load control based on inputted data;
• an input/output unit for generating signals wherein an input side of said input/output unit is connected to a plurality of sensors and an output side of said input/output unit is connected to at least one load;
• input/output lines for connecting said input/output unit and said central processing unit to each other for inputting data thereto, said input/output lines include at least one digital data transmission line and an analog data transmission line;
• an A/D conversion means operatively employed in said central processing unit for converting analog signals from said input/output unit to digital signals;
• a bus controller employed in the input/output unit and a bus controller employed in the central processing unit operatively connected to each other by said at least one digital data transmission line, said bus controllers transmitting specific data indicating a sensor type of analog data through said at least one digital data transmission line when transmitting said analog data;
• and
• a control means operatively connected to said central processing unit for storing received analog data by associating said analog data with a sensor type of said analog data, wherein said control means includes said A/D conversion means connected to said analog data transmission line;
• a register for storing digital data resulting from conversion by said A/D conversion means;
• and a processing means for processing digital data read out from said register, wherein said A/D conversion means is used for sequentially converting input analog signals coming from a plurality of ports one signal after another into digital data;
• and upon activation of one of said internal switches in accordance with a request issued by said central processing unit, said input/output unit transmits a signal for permitting said processing means to read out data from said register after a time it takes for a voltage of an input signal to sufficiently rise as an analog signal and a time it takes for said A/D conversion means to convert input analog signals from each of said ports into digital data have lapsed.