Mitsubishi Electric MELSEC iQ-R C R12CCPU-V, User Manual

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6 Ethernet COMMUNICATION FUNCTIONS
6.7 Parameter Settings
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6
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TCP retransmission processing
In TCP connection, the retransmission processing is performed for the number of retransmission and at the retransmission
interval shown below when the TCP protocol ACK response is not returned from a target device against transmission. When
no TCP protocol ACK response is returned in 60 seconds after the last retransmission, the connection is terminated as being
determined the target device has an error.
• Number of retransmission: 12 times
*1
• Retransmission interval
*2
: (The number of retransmission
×
the number of retransmission
×
RTO
*3
)
÷
1024 (seconds)
*1 After 30 seconds from establishment of the connection, destination device error is assumed and the connection is terminated even if the
number of resends does not reach to 12 times.
*2 The maximum value of the retransmission time is 60 seconds.
*3 RTO (retransmission timeout) is a value increases exponentially based on RTT (round-trip time).
FTP server settings
Set the FTP function.
[Module Parameter]  [Application Settings]  [FTP Server Settings]
Window
Displayed items
Password Setting
■
Current password
Enter the current password for login to a C Controller module.
Change the password when using the FTP function.
Otherwise, unauthorized access may be caused.
■
New password and confirmation password
To change the password, enter a new password in "New Password" and "Confirm New Password".
Item Description Setting range Default
FTP Server Select whether to use the FTP function of a C Controller module. • Not Use
• Use Use
Login Name Set the login name to be used for file transfer request (login) from the
target device. Up to 12 characters target
Advanced
Settings Password Setting Set the password to be used for file transfer request (login) from the
target device. 8 to 32 characters password