Driver Kernel Additional Fields
- Last UpdatedDec 02, 2024
- 2 minute read
The Kernel Driver window, launched via the Page Driver Kernel command, displays information about each driver in the Plant SCADA system. The statistics it presents include read requests, physical reads, digital reads per second, register reads, cache reads, error count, timeouts, and so on. See the Plant SCADA User Guide for details on the general statistics it presents.
In the case of the ABCLX driver, the Kernel Driver window includes additional fields that are not normally supported. Press "V" to see these additional fields. They are:
|
Field |
Description |
|
Session Thread State |
Current state of the driver EIP session thread: 0 – Thread is stopped 1 – Thread is starting 2 – Thread is running 3 – Thread is stopping |
|
Session State |
Current state of the driver EIP session to the PLC: 0 – The session has not been initialized yet 1 – The session is connecting to the PLC and downloading the PLC tag database 2 – The session has connected to the PLC and downloaded the PLC tag database 3 – The session is subscribing the tags to the PLC 4 – The session is currently polling the subscribed tags 5 – The session has terminated unexpectedly and will be restarted |
|
Socket Thread State |
Current state of the socket to the PLC (same thread states as Session Thread State above) |
|
Backend Pending Resp |
Number of requests currently awaiting response from the PLC |
|
Cache Delayed Reply |
Number of cache read requests currently being delayed by driver |
|
Group Poll Counter |
Number of polls sent out by the driver |
|
Missed Group Polls |
Number of polls that were skipped by the driver |
|
Avg Group Poll Time |
Average time in milliseconds for a complete scan of the tags |
|
Forward Opens |
Number of Forward Open sessions to the PLC |
|
Optimized Blocks |
Number of optimized blocks created by the driver. Should match number of Forward Opens. |
|
Tags Subscribed |
Number of non Quality and non Timestamp Plant SCADA tags for this unit |
|
Good Tags |
Number of tags that were successfully resolved in the PLC |
|
Bad Tags |
Number of tags that were not successfully resolved in the PLC |
|
QTM Tags |
Number of Quality and Timestamp tags subscribed to |
|
Session Disabled |
Indicates whether session is currently disabled. Value of 1 indicates session is disabled. |
|
Tag Config Warnings |
Number of tags that still are considered good but have some issue that needs to be looked at |
|
Init Timeout |
Number of connection attempts that have been timed out |