Abstract: In an electronic control system for a construction machine, a governor control unit (17), an excavator body control unit (23), and an electric lever control unit (33) are interconnected for transmission and reception of data.

Abstract: A system having a monitoring function in addition to a control function is able to suppress an increase in the amount of data communication and the communication frequency via a common communication line, and is flexibly adaptable for the addition of a new function without causing mutual interference between control data and monitor data. In particular, a hydraulic excavator 1 includes a first control unit 17 for a prime mover 14, a second control unit 23 for a hydraulic pump 18, a third control unit 33 for control valves 24, 25 and 26, and first and second monitor units 45, 46. A first common communication line 39 for control and a second common communication line 40 for monitoring are further provided as common buses for data communication.

Abstract: An information display unit 47 is provided inside a cab of a hydraulic excavator 1 and has a display portion 471 capable of displaying plural kinds of information including body information and maintenance information. A screen image displayed on the display portion 471 comprises one main screen and a plurality of sub-screens. The main screen displays information regarding one of a plurality of information categories in detail and the plurality of sub-screens respectively correspond to the plurality of information categories. The sub-screens corresponding to the information categories other than the information category, for which information is displayed on the main screen in detail, display the corresponding information categories in the simplified form. The information category displayed on the main screen can be selected and changed with key manipulation made on an operating portion 470.

Abstract: A system having a monitoring function in addition to a control function is able to suppress an increase in the amount of data communication and the communication frequency via a common communication line, and is flexibly adaptable for addition of a new function without causing mutual interference between control data and monitor data.