Mitsubishi Electric MELSEC iQ-R Series User Manual page 189

■Precautions for Active open
Use 'Open completion signal' (Un\G6291456) and 'Open request signal' (Un\G6291464) in the program to create an interlock
circuit. The on/off timing for the open completion signal and open request signal is shown below.
'Open completion signal' ON
(Un\G6291456)
OFF
ON
'Open request signal'
(Un\G6291464) OFF
OPEN instruction
■Precautions for Passive open
• Use 'Open completion signal' (Un\G6291456) and 'Open request signal' (Un\G6291464) in the program to create an
interlock circuit. The on/off timing for the open completion signal and open request signal is shown below.
ON
'Open completion signal'
(Un\G6291456)
OFF
ON
'Open request signal'
OFF
(Un\G6291464)
• With TCP/IP, one external device is connected to with one connection. To connect with multiple external devices with the
same own station port number, provide a connection for each external device. If more external devices than the prepared
number of connections are connected, the connection will be disconnected immediately.
• Connect from the external device after the CC-Link IE TSN Plus module enters the open standby state. The TCP/IP
connection request received from the external device between the time from CPU startup completion to open wait state
causes an error, and force close connection is returned to the external device. In this case, wait for the CC-Link IE TSN
Plus module to enter the open wait state and then retry from the external device.
• Do not execute the CONCLOSE instruction in the program. If the CONCLOSE instruction is executed, the open completion
signal and open request signal for the corresponding connection will turn off. The close processing will be executed and
send/receive will be disabled. To re-open a closed connection, execute the CONOPEN instruction.
<When disconnected by the CC-Link IE TSN Plus module>
TCP connection disconnection completed upon response from the external device
TCP connection disconnection request from the CC-Link IE TSN Plus module
CLOSE instruction
<When disconnected by the external device>
TCP connection disconnection request from the external device
TCP connection disconnection completed upon response from the CC-Link IE TSN Plus module
CLOSE instruction
TCP connection disconnection completed by the external device
TCP connection completed by the external device
Always on
9 FUNCTIONS
9.4 Ethernet Connection
9
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