IDEC WindSRV - Manual (Page 126)

125
www.kepware.com
KEPServerEX5 Help
Ethernet operation. When a new device is added to the channel, the Ethernet Encapsulation settings can be used to
select an Ethernet IP address, an Ethernet Port number and the Ethernet protocol.
How To... Resolve Comm Issues When the DNS/DHCP Device Connected to the Server
is Power Cycled
Certain drivers support DNS/DHCP resolution for connectivity. These devices also allow users to assign unique Domain/
Network names for identification purposes. When starting and connecting to the network, the devices will request an IP
address from the Network DNS server. This process of resolving a domain name to an IP address for connectivity takes
time; thus, for greater speed, the OS will cache all of the resolved IP/Domain names and then re-use them. The
resolved names are held in cache for two hours by default.
If The Server Fails to Re-Connect to a Device
This issue normally occurs when the name of the IP address (associated with the device's Domain/Network) changes. If
the change is a result of the device being power cycled, it will acquire a new IP. It could, however, also be a result of
the IP being changed on the device manually. In both cases, the IP address that was being used no longer exists.
Resolving the Problem
The server automatically flushes the cache every 30 seconds; thus forcing the IP to be resolved. If this does not resolve
the issue, users can manually flush the cache by typing the command string "ipconfig /flushdns" in the PC's command
prompt.
Note: For more information, refer to the following Microsoft Support article
Disabling and Modifying Client Side
DNS Caching .
Error Descriptions
The following error/warning messages may be generated. Click on the link for a description of the message.
Server Runtime Error Messages
'' device driver was not found or could not be loaded
'' Server Started
'' successfully configured to run as a system service
'' successfully removed from the service control manager database
Attempt to add DDE item '' failed
Attempt to add FastDDE/SuiteLink item '' failed
Attempt to add OPC client item '' failed
Attempting to automatically generate tags for device ''
Auto generation for tag '' already exists and will not be overwritten
Auto generation produced too many overwrites, stopped posting error messages
Completed automatic tag generation for device ''
Configuration session assigned to '' as Default User has ended
Configuration session assigned to '' demoted to Read Only
Configuration session assigned to '' promoted toWrite Access
Configuration session started by ''
Configuration TCP/IP port number changed to ''
Data collection is '' on device ''
DDE client attempt to add topic '' failed
Delete object '' failed
Demo timer started. '' '' '' ''
Demo timer updated. 'ime remaining>'
Demonstration time period has expired
Demonstration time period has expired
Device '' has been auto-demoted
Device '' has been auto-promoted to determine if communications can be re-established
Failed to upload project XML
FLEXnet Licensing Service must be enabled to process your license