Mitsubishi PLC to PLC Socket Comm( Active & Passive)(SP.SOCOPEN, SP.SOCRCV, SP.SOCSND)
TCP (Transmission Control Protocol) establishes a connection to a device with a port number, and performs reliable data communication.
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To perform socket communication using TCP, confirm the following in advance.
IP address and port number of the target device
IP address and port number of the Ethernet-equipped module
Which side will open a connection, the target device or Ethernet-equipped module? (Active open or Passive open)
SP.SOCOPEN : Establishes a connection. (CPU module dedicated instruction)
SP.SOCRCV : Reads the data received. (Read at END processing) (CPU module dedicated instruction)
SP.SOCSND : Sends data. (CPU module dedicated instruction)
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