OPCLX Device-specific Parameters
- Last UpdatedDec 16, 2021
- 1 minute read
The following table describes the citect.ini parameters that are specific to the OPCLX driver.
|
[OPCLX] |
Allowable values |
Default value |
Description |
|---|---|---|---|
|
Active |
0 - deactivate tag. 1 - leave tag active. |
Value of LeaveTagsActive parameter. |
Allows you to override the global default value of LeaveTagsActive parameter individually to specify whether tags should be left active or inactive for a particular OPCLX I/O device. Replace the placeholders <IOServerName> and <IODeviceName> in the parameter with the names of the OPC I/O server and I/O device you want to override and be active. Determines whether individual OPCLX tags are left active even though Plant SCADA is no longer requesting them from the driver. Normally tags are made inactive 5 seconds from the last time they are requested. See the ItemLifeTime parameter in Driver-specific Parameters. |
|
Update |
Time (seconds) |
5 |
Determines the time in before a tag is deemed inactive. The global LeaveTagsActive parameter overrides the ItemLifeTime parameter to force OPCLX tags to remain active even though Plant SCADA is no longer requesting them from the driver. The ItemLifeTime parameter can be individually overridden for any Allen Bradley OPC device by the active parameter. |
|
UseAsyncWrites |
0 - use synchronous writes. 1 - use asynchronous writes. |
0 |
Determines whether writes are synchronous or asynchronous. |