Driver Statistics
- Last UpdatedAug 04, 2025
- 2 minute read
You can use the following driver statistic counters to help you debug the OFSOPC driver. These statistics can be viewed within the Plant SCADA Kernel using the Page Driver command and then by pressing the 'v' key to select verbose mode.
See the topic Runtime > Debug Runtime > The Kernel > Kernel Commands > Page Driver in the main Plant SCADA help for more information.
|
Statistic |
Description |
|---|---|
|
Total Tags |
Number of tags added to the OFSOPC driver, this might include the virtual tags. |
|
# Uncertain Reads |
The number of reads that cannot be completed immediately due to a stale cache value. When a tag is read that has uncertain quality, it will trigger item activation on the OFS server, allowing diagnosis of the tag status. |
|
# OPC Item Updates |
Number of items updated from OFS server via OnDataChange event. |
|
# Read Unsuccessful |
Number of unsuccessful ReadDCBs. |
|
# Writes Unsuccessful |
Number of unsuccessful WriteDCBs. |
|
Pending DCB Size |
Number of DCB not replied. |
|
Pending Tasks |
Number of tasks requested by the front-end and not served by the back-end driver. |
|
Pending Write Tasks |
Number of WriteDCBs not replied. |
|
Completed Tasks |
Number of tasks completed in the back-end. |
|
Configured OPC Items |
Number of OPC items added to the OFS server. |
|
Bad OPC Items |
Number of OPC items add to the OFS server unsuccessful. |
|
Inactive Items |
Number of deactivated OPC items (representing a total of the inactive items in groups 1, 2 and 3). |
|
Temp Group Items |
Number of items assigned to OPC temporary group. (This is the internal group used by the OFSOPC driver to hold temporary subscriptions.) |
|
Group1 Items |
Number of items assigned to OPC group 1. |
|
Group2 Items |
Number of items assigned to OPC group 2. |
|
Group3 Items |
Number of items assigned to OPC group 3. |
|
Push Data Items |
Number of items assigned to OPC push-data group. An item is considered a push-data item if its address is defined within the configured push-data address range. |
|
Batch Write Units |
Number of units that are currently have BatchWrite on mode. |
|
Batch Write Items |
Numbers of WriteDCBs in batch-write mode. |