| VI Server Method Information
|
| Method ID
|
7F8
|
| Scope
|
Basic Development Environment
|
| Data Name
|
Conn Responsive.Info
|
| Short Name*
|
Conn Responsive.Info
|
| Long Name*
|
Connection Responsiveness:Information
|
| * Displayed here in English. Short and Long names appear in the language of the LabVIEW IDE.
|
| Owning Class ID
|
1
|
| Owning Class Name
|
Application Class
|
| Return Data Type
|
No return value
|
| Invoke Node
|
|
| Available in Real-Time Operating System | Yes |
| Available in Run-Time Engine | Yes (Read/Write) |
| Remote access allowed | Yes |
Gets and sets how often LabVIEW checks if a VI Server connection is responsive.
Set the PingDelay and PingTimeout parameters of this method to configure how LabVIEW checks the connection. If LabVIEW does not receive a message in the time you specify in PingDelay, LabVIEW sends a query to prompt the VI Server network connection for a message. After sending the query, if LabVIEW does not receive a message in the time you specified in PingTimeout, LabVIEW considers the connection unresponsive. Then, all VIs and functions waiting on the connection return network connection error code 1130.
For example, if you set PingDelay to 3000 and PingTimeout to 1000, LabVIEW sends a query to verify the status of the VI Server network connection every time 3 seconds elapse without LabVIEW receiving a message over the connection. If LabVIEW does not receive a reply from the network, LabVIEW waits 1 second before all VIs and functions waiting on the connection return network connection error 1130, which you can handle on the block diagram.
Default for PingDelay and PingTimeout is 10,000 ms, which means LabVIEW checks the connection every 10 seconds and waits up to 10 seconds for the connection to respond.
| Note If a network operation times out according to the timeout value you specify in PingTimeout, LabVIEW considers the connection unresponsive but does not close the connection. All current and future calls waiting on the connection return a connection error. LabVIEW does not send another message to query the connection status until LabVIEW considers the connection responsive again. A connection becomes responsive again when LabVIEW receives a message over the connection.
|
Parameters
| Data type
|
Name
|
Required
|
Description
|
|
Ping Delay
|
No
|
|
|
Previous Ping Delay
|
No
|
|
|
|
Ping Timeout
|
No
|
|
|
|
Previous Ping Timeout
|
No
|
|
Uses
History
| Version
|
Change(s)
|
|
More info to come.
|
See Also
External Links
