Using the Redirector :: The Serial/IP Control Panel

Restore Failed Connections to Server

This option causes the Serial/IP Redirector to attempt to restore failed network connections to the server.

To set Restore Failed Connections

In the Serial/IP Control Panel:

Select a virtual COM port.
Select the check box Restore Failed Connections to Server.
The setting becomes effective without further action.

The new setting will be used the next time this virtual COM port is opened.

Settings

Disabled (default)

The redirector takes no independent action to re-establish the connection.
For this virtual COM port, a connection to the server will not be restored until the application closes and reopens the virtual COM port.

Enabled

When the redirector notices that the TCP connection is broken, it will immediately attempt to reconnect to the server.
If that attempt fails, the redirector tries again at increasing intervals until the connection is restored or the application closes the virtual COM port.
The maximum interval between attempts is determined by the setting of the advanced option Max Connection Recovery Interval. details

Tips

The Restore Failed Connections option should be used if the application can continue normal operation if a failed connection is automatically restored. Whether this is possible depends on:

What has happened on the server when the connection failed? Is the device still in an operable state?
If the redirector reconnects, will it get the same device?
Can the application tolerate a delay in detecting the failed connection and the time it takes to reconnect?

Notes

If the COM Port Control protocol is being used, the redirector uses keep-alive messages to discover a failed network connection more quickly. The interval between these messages is configurable with the advanced option Keep-Alive Interval. details