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A
- 12
(b) Precautions for Telnet connection
If the line is disconnected during use of Telnet, it cannot be reconnected until TCP
connection including the Telnet on the C Controller module side is timed out.
If this occurs, reconnect it after timeout.
The timeout time for the C Controller module side Telnet (TCP) connection can be
changed by setting the values in the calculation formula by the following setting
methods.
[Calculation formula for the Q12DCCPU-V]
The timeout time is determined by the following calculation formula.
Timeout time =
net.inet.tcp.keepidle
+ (net.inet.tcp.keepintvl
Initial value for C Controller module: 30000 (30 seconds)
Initial value for VxWorks: 7800000 (2 hours and 10 minutes)
net.inet.tcp.keepidle:
net.inet.tcp.keepintvl: Retry interval (ms)
* 1 The number of retries cannot be changed.
[Setting method for the Q12DCCPU-V]
The following explains how to set the initial value to 30 seconds.
• Setting while the C Controller module is in operation
1) Connect the line to the C Controller module with the Telnet tool.
2) Execute the following two Sysct1() commands with the Telnet tool to set
the timeout time to the initial value.
Sysctl("net.inet.tcp.keepidle = 22000")
Sysctl("net.inet.tcp.keepintvl = 1000")
3) Close the Telnet connection.
• Setting at the timing of starting C Controller module
1) Describe the following two Sysct1() commands on the script file,
"STARTUP.CMD".
Sysctl("net.inet.tcp.keepidle = 22000")
Sysctl("net.inet.tcp.keepintvl = 1000")
2) Write the above script file, "STARTUP.CMD" to a CompactFlash card,
and insert it into the C Controller module.
3) Upon start of the C Controller module, the timeout time is set to the
initial value.
8 (number of retries)
Time from line disconnection to the first retry (ms)
Initial value for C Controller module: 22000
Initial value for VxWorks: 7200000
Initial value for C Controller module: 1000
Initial value of VxWorks: 75000
*1
) [ms]
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