IDEC WindSRV - Manual (Page 110)

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KEPServerEX5 Help
iFIX process database (PDB) tags and the server tags. To access this tab, click File | Project Properties.
Note: The iFIX PDB Settings dialog will only be displayed in Project Properties if iFIX is installed on the computer.
Note: It is recommended that users keep the default values for each field. Users should also ensure that the settings
meet the application's requirements.
General
Enable connectivity to iFix PDB.
This parameter is used to enable or disable support of the Client/Server protocols. If the iFix PDB operation is disabled,
the server will not respond to any request for iFix PDB data. For better performance and security when the server is
only being used for OPC connectivity, disable this parameter.
Wait xx seconds before timing out on requests between PDB and Driver
This parameter specifies the amount of time that the iFIX PDB will wait for a response from an add, remove, Read or
Write request before timing out. Once timed out, the request will be discarded on behalf of the server. A timeout can
occur if the server is busy processing other requests or if the server has lost communications with iFIX PDB. In the case
of lost communications, the iFIX PDB will automatically re-establish communications with the server so that successive
timeouts do not occur. The valid range is 5-60 seconds. The default setting is 5 seconds.
Enable Latched Data
Normally, the iFIX application's data links will display a series of question marks (such as "????") if a communication
failure has occurred. Users, however, may want to have a value displayed at all times. By enabling latched data, the
last value successfully read will be preserved on the screen. This feature is disabled by default.
Note: Data latching is not supported for AR and DR blocks.
iFIX PDB Read Inactivity
This parameter allows the server to automatically deactivate tags that have not been read by iFIX for the time period
specified. This reduces unnecessary polling of the process hardware. When iFIX PDB Read Inactivity feature is enabled,
the server will look through its list of tags every 15 seconds and will deactivate any that are idle. If iFIX has not
performed a Read request of a tag for the time period specified, the tag is considered idle. Since the server checks for