COMMUNICATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a communication system wherein controller equipment is provided with only a client function of a communication protocol and control target equipment is only a server function thereof in inter-equipment command transmission connected to a network. SOLUTION: In the system in which the communication protocol in which a request and a response correspond to one to one is used and two or more return values return for a control command, first equipment continuously transmits a first request for transmitting a command and one or more second requests for receiving the return value to second equipment, which returns the return value by using the response corresponding to the first and second requests.