Timer Settings For Data Communication - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Timer Settings for Data Communication

Set the timer used for the following communications.
• Connection with MELSOFT products and a GOT
• Communications using the SLMP
• Communications using the predefined protocol
• Socket communications/Communications using the fixed buffer
• Communication using the random access buffer
• File transfer function (FTP server)
• File Transfer Function (FTP Client)
When changing the timer settings for data communication, refer to the precautions before setting. ( Page 261 Precautions
for settings)
Item
Change/Set Timer Value
TCP Resend Timer
Destination Alive Check Start Interval Timer
Destination Alive Check Interval Timer
Destination Alive Check Resend Count
Advanced Response Monitoring
Settings Timer
TCP ULP Timer
TCP End Timer
TCP Zero Window Timer
IP Assembly Timer
*1 Set in increments of 100ms.
2 PARAMETER SETTINGS
260
2.3 Application Settings
Description
Select whether to change timer values from the default.
The timer operates with its default value when "No" is selected.
Set the waiting time to resend ACK if it is not returned when a
connection is opened or data is sent in TCP/IP. This timer is also used
for Time to Live for the ARP function. (ARP is resent at intervals of
50ms if no response to an ARP request is returned.) This timer is also
used as the minimum set time for arrival monitoring time for data link
instructions.
Set the time interval between the reception of the last message from
the external device and the start of alive check.
Set the time interval for performing alive check again when no
response is returned from the external device of alive check target.
Set the number of times to perform alive check when no response is
returned from the external device of alive check target.
Set the following time.
• The time to wait for a response after sending command in
communications with a fixed buffer (procedure exists)
• The time interval between the first message and last message when
receiving the divided messages.
Set the time-to-live of the send packet in TCP/IP communications.
For example, when the TCP resend timer value is set to 10 seconds
and the TCP ULP timer value is set to 30 seconds, data will be resend
every 10 seconds if no response is returned from the external device
after data sending, and timeout error occurs if no response is returned
within 30 seconds.
When closing the TCP/IP connection by the own station, set the
monitoring time for waiting for a FIN from the external device after the
own station sends a FIN and an ACK is returned from the external
device. If a FIN is not received from the external device within the time
specified by the TCP end timer value, an RST is sent to the external
device and the connection is forcibly closed.
The window means the receive buffer on the receive side. If the receive
buffer on the receive side has no free space (window size = 0), data
sending is waited until the receive side has free receive buffer space.
At this time, the sending side sends packets for checking the send
window to the receive side according to the TCP zero window timer
value to check the receiving status.
The communication data may be divided at the IP level before being
sent due to the buffer limitation of the sending station or the receiving
station. Set the waiting time for the divided data in such a case.
Setting range
• No
• Yes
(Default: No)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 10s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 600s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 10s)
1 to 99999
(Default: 3)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 30s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 30s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 20s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 10s)
Unit [s]: 1 to 16383
*1
Unit [ms]: 100 to 16383000
(Default: 5s)