Pi interface for Bailey Infi90



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PI BaInfi90 1.8.4.9
Buffering
58

API Buffer Server Service
Use the API Buffer Server Service page to configure Bufserv as a Service. This page also allows you to start and stop the Bufserv Service
Bufserv version 1.6 and later does not require the logon rights of the local administrator account. It is sufficient to use the LocalSystem account instead. Although the screen below shows asterisks for the LocalSystem password, this account does not have a password.



PI Interface for Bailey Infi90
59
Configuring Buffering Manually
Buffering is enabled through the use of a configuration file, piclient.ini
. Unless this file is modified to explicitly enable buffering, the PI API will not buffer data, sending data directly to the home node. 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.
Note: When buffering is configured to be on, the bufserv process must be started before other programs using the PI API, so that these programs can access the shared buffering resources. Any program that makes a connection to a PI Server has this requirement even if it does not write to PI. Configure buffering through entries in the piclient.ini file. The file is found in the dat subdirectory of the
PIHOME
directory (typically c:\program files\pipc\dat
). This file follows the conventions of Microsoft Windows initialization files with sections, keywords within sections, and values for keywords. Enter all buffering settings in a section called
[APIBUFFER]
. To modify settings, edit the piclient.ini file in a text editor, such as Notepad. The following settings are available for buffering configuration
Keywords
Values
Default
Description
BUFFERING
0, 1 0 Turnoff on buffering. OFF = 0, ON = 1,
PAUSERATE
0
– 2,000,000 2 When buffers are empty the buffering process will wait for this long before attempting to send more data to the home node (seconds)



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