transferring data (with FC5 "AG_SEND" and FC6 "AG_RECV") with variable message lengths via the TCP protocol

가변 길이 Message 전송 (s7 plc)

https://support.industry.siemens.com/cs/document/8707570/transferring-data-(with-fc5-ag_send-and-fc6-ag_recv-)-with-variable-message-lengths-via-the-tcp-protocol?dti=0&lc=en-WW