Mitsubishi L02CPU User Manual page 73

(d) Precaution for Active open communication
Configure an interlock circuit using the Open completion signal (SD1282) and Open request signal (SD1284) in
the program.
The following chart shows on/off timings of the Open completion signal and Open request signal.
Open completion signal
(SD1282)
OFF
Open request signal
(SD1284)
OFF
<When disconnected by the CPU module>
ON
ON
SOCOPEN instruction
<When disconnected by the external device>
CHAPTER 7 SOCKET COMMUNICATION FUNCTION
TCP disconnection completed upon
response from the external device
TCP disconnection request from the CPU module
SOCCLOSE instruction
TCP disconnection request from the external device
TCP disconnection completed upon
response from the CPU module
SOCCLOSE instruction
7
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