Interface to the pi system
Stopping Interface Running as a Service
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- Navigate this page:
- Configuring Buffering with PI ICU (Windows)
- Service Name The Service name displays the name of the PI API Buffering Service. Display Name
- Confirm password Reenter the password to verify it has been typed correctly both times. Dependencies
- Enable Buffering Enable the PI API Buffering feature. Maximum File Size
- Primary Memory Buffer Size
- Secondary Memory Buffer Size
- Max Theoretical Send Rate
Stopping Interface Running as a ServiceIf the interface was installed a service, it can be stopped at any time from PI ICU, the services control panel or with the command: blysem.exe –stop The service can be removed by: blysem.exe –remove To stop the interface service with PI ICU, use the This section describes starting and stopping the interface once it has been installed as a service. See the UniInt Interface User Manual to run the interface interactively.
BufferingFor complete information on buffering, please refer to the PI API Installation Instruction. PI Interface Node buffering consists of a buffering process which runs continuously on the local node, a PI API library whose calls can send data to this buffering process, and a utility program for examining the state of buffering and controlling the buffering process. Note: Change the Local Security Policy on Windows XP. 1. Open “Administrative Tools” from the control panel. 2. Open “Local Security Policy” from administrative tools. 3. Browse to “Security Options” under “Local Policies.” 4. Double click on “System Objects: Default owner for objects created by members of the Administrators group.” 5. Change the dropdown from “Object Creator” to “Administrators group.” The behavior of Bufserv should now be the same on Windows XP as it was for Windows and 2000. Configuring Buffering with PI ICU (Windows)Buffering is enabled through the PI Interface Configuration Utility’s Tools>API Buffering… menu. Unless buffering is explicitly enabled, the PI API will not buffer data, sending data directly to the home node. The API Buffering… dialog allows the user to view and configure the parameters associated with the PI API Buffering (bufserv) process. The user can start and stop the PI API Buffering process from the Service tab: 
Service TabThe Service tab allows for some PI API Buffering service configuration. For further configuration changes, use the Services applet. Service NameThe Service name displays the name of the PI API Buffering Service. Display NameThe Display name displays the full name associated with the PI API Buffering service. Log On AsLog on as indicates the Windows user account under which the PI API Buffering service is setup to start automatically on reboot, or manually. PasswordPassword is the name of the password for the Windows user account entered in the Log on as: above. Confirm passwordReenter the password to verify it has been typed correctly both times. DependenciesThe Dependencies lists the Windows services on which the PI API Buffering service is dependent. Dependent ServicesThe Dependent services area lists the Windows services that depend on bufserv to function correctly. Start / Stop ServiceThe Start / Stop buttons allow for the PI API Buffering service to be started and stopped. If the service is not created, this box will show Not Installed. After a change is made to any of the settings on the Settings tab, the OK button must be clicked to save these settings, and then the service must be stopped and restarted for the changes to be picked up by bufserv. Service Startup TypeThe Startup Type indicates whether the PI API Buffering service is setup to start automatically on reboot or manually on reboot, or is disabled.
Generally, the PI API Buffering service is set to start automatically. Create/Remove ServiceThe Create / Remove buttons allow for the creation or removal of the PI API Buffering service. Clicking the Create button will cause the service to be created using the Log on as and passwords given. Once the service is created the Start / Stop buttons will be activated. Settings TabThe Settings tab allows for configuration of the 7 configurable settings used by PI API Buffering. Default values are used if no other value is provided. 
Enable BufferingEnable the PI API Buffering feature. Maximum File SizeMaximum buffer file size in kilobytes before buffering fails and discards events. Default value is 100,000. Range is 1 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Send RateSend rate is the time to wait between sending up to MAXTRANSFEROBJS to the server (milliseconds). Default value is 100. Range is 0 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Primary Memory Buffer SizePrimary memory buffer size is the size in bytes of the Primary memory buffer. Default value is 32768. Range is 64 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Secondary Memory Buffer SizeSecondary memory buffer size is the size in bytes of the Secondary memory buffer. Default value is 32768. Range is 64 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Max Transfer ObjectsMax transfer objects is the maximum number of events to send between each SENDRATE pause. Default value is 500. Range is 1 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Pause RateWhen buffers are empty the buffering process will wait for this number of seconds before attempting to send more data to the home node. Default value is 2. Range is 0 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Retry RateWhen the buffering process discovers the home node is unavailable it will wait this number of seconds before attempting to reconnect. Default value is 120. Range is 0 to 2,000,000. The Use Default button places the default value into the text box. To keep this value, click the Apply button. Max Theoretical Send RateThis is the theoretical max send rate which is calculated like this: max = MAXTRANSFEROBJS / SENDRATE * 1000 Default value is 5000. This value is automatically calculated for the user and can not be changed. There are no additional steps needed to install buffering after installing the PI API. The delivered PI API library supports both buffered and un-buffered calls. Directory: interfaces interfaces -> Pi interface for Siemens Spectrum Power tg (Linux) interfaces -> Interface to the pi system Version 37 and Greater interfaces -> Citect Interface interfaces -> How to Contact Us interfaces -> How to Contact Us interfaces -> Emerson Deltav batch Interface Download 0.56 Mb. Share with your friends:
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button on the PI ICU toolbar.