Mitsubishi Electric QJ71E71-100 User Manual page 95

After parameter communications, check that the initial process of the E71 is normally completed.
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(Initial normal completion signal (X19): ON)
After the initial process is normally completed, the connection enters open enable status and the E71 waits for an
open request from the connected device.
The E71 starts the open process upon receiving the open request (SYN) from the connected device. When the
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open process is normally completed, Open completion signal (address: 5000
communications are enabled.
The E71 starts the close process upon receiving the close request (FIN) from the connected device. When the
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close process is completed, Open completion signal (address: 5000
disabled.
After the internal process of the E71 is completed, the connection returns to the open acceptance enable status.
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*1 An open request (SYN) received after the normal completion of an initial process and before the E71 is in the open
acceptance enable status will cause an error, and the E71 sends a connection forced close (RST).
When the open/close processes are performed from the E71 side using a dedicated instruction, even if "Always wait for
OPEN" has been selected for the Ethernet operation setting, the connection will not return to the open acceptance enable
status after the close process is completed.
CHAPTER 7 COMMUNICATION PROCEDURE
(b0)) turns on and data
H
(b0)) turns off and data communications are
H
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