| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for a construction machine, capable of minimizing the correction parts of a program even when communication data or communication protocols between the controllers for the construction machine are changed. <P>SOLUTION: When transmission object data exceed the upper limit size of packets determined by the standard of multiple communication lines, a communication data generation part 17 of a communication data processing part 63 imparts a transmission object data identifier to a part of the transmission object data and prepares packet data according to the communication protocol determining the procedure of dividing the transmission object data into a plurality of packets and transmitting them. A communication session processing part 81 of the communication protocol processing part 62 exchanges communication session control packet data determined by the communication protocol with a communicating opposite party, and requests a communication data generation part 71 to prepare packet data at the point of time when transmission is possible. <P>COPYRIGHT: (C)2012,JPO&INPIT |
