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● The corresponding bit of Open completion signal (address: 5000
H
) automatically turns off and the communication line is
closed in the following situations:
• A timeout has occurred in the alive check function. ( Page 194, Section 14.7)
• An E71 has received a close request and the ABORT (RST) instruction from a connected device.
• An E71 has received Alive open request from a connected device again with open completed in TCP.
After an E71 sends an ACK to a connected device, the E71 closes the connection when receiving the RST
command from the connected device. If the E71 with a different IP address or port number receives Active open
request from the connected device again, the E71 only sends the RST command. (It does not close the
connection.)
• A timeout has occurred upon transmission in TCP.
● After the connected device sends a close request to the E71, wait for 500ms or more before performing an open process
again.
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