An object of the present invention is to provide a control system of an industrial machine that can efficiently and effectively match and equalize the content information of various data between devices of the industrial machine. The invention is a control system of an industrial machine for matching data in the present device with data in one or more other devices, wherein the control system comprises a changed data identification list including: the regions of a type data storage unit serving as the superordinate class of type data; the regions of a subdivision data type storage unit serving as a subordinate class; and an identifier storage unit indicating identifiers which, when data in each of the regions is changed, identify the change of the data, the present device comprises: a changed data identification list storage unit storing the changed data identification list; a present-device-side data storage unit storing various data; and an updated data processing unit, and the other device comprises: an other-device-side data storage unit storing various data; and an operation execution unit using the various data to perform a desired operation.

A communication system according to one aspect of the present disclosure is a communication system in which a plurality of communication devices are connected to a network. The plurality of communication devices include a time master including a master clock that manages time of the communication system and a plurality of time slaves each of which includes a slave clock time-synchronized with the master clock. Each of the plurality of time slaves includes a synchronization unit that performs time synchronization with another communication device connected adjacent to a master side on the network and a communication unit that notifies the time master of time synchronization information indicating time synchronization accuracy of the own device obtained by the synchronization unit.

A communication system according to one aspect of the present disclosure is a communication system in which a plurality of communication devices are connected to a network. The plurality of communication devices include a time master including a master clock that manages time of the communication system and a plurality of time slaves each of which includes a slave clock time-synchronized with the master clock. Each of the plurality of time slaves includes a synchronization unit that performs time synchronization with another communication device connected adjacent to a master side on the network and a communication unit that notifies the time master of time synchronization information indicating time synchronization accuracy of the own device obtained by the synchronization unit.

An object of the present invention is to provide a control system of an industrial machine that can efficiently and effectively match and equalize the content information of various data between devices of the industrial machine. The invention is a control system of an industrial machine for matching data in the present device with data in one or more other devices, wherein the control system comprises a changed data identification list including: the regions of a type data storage unit serving as the superordinate class of type data; the regions of a subdivision data type storage unit serving as a subordinate class; and an identifier storage unit indicating identifiers which, when data in each of the regions is changed, identify the change of the data, the present device comprises: a changed data identification list storage unit storing the changed data identification list; a present-device-side data storage unit storing various data; and an updated data processing unit, and the other device comprises: an other-device-side data storage unit storing various data; and an operation execution unit using the various data to perform a desired operation.