1

CLIENTS

2

EVENTS

3

GROUPS

4

ITEMS

5

PERIOD

6

READS

7

RUNNINGPROJECTS

8

TOTALPROJECTS

9

WRITES

1

CLIENTS

Point ID

\\STATISTICS\CLIENTS.VALUE

Description

Number of OPC clients currently connected to the CIMPLICITY OPC Server.

2

EVENTS

Point ID

\\STATISTICS\EVENTS.VALUE

Description

Number of  value updates have been sent to attached OPC clients in the last PERIOD (second).

3

GROUPS

Point ID

\\STATISTICS\GROUPS.VALUE

Description

Number of OPC Group objects have been created by all attached clients.

Note: Some OPC client applications initially create a large number of OPC groups and disable the subscription updates until needed. While this will not cause CPU loading problems, it could cause the initial connection and setup time with the CIMPLICITY OPC Server to be slow or for a large amount of memory to be used by the OPC Server.

4

ITEMS

Point ID

\\STATISTICS\ITEMS.VALUE

Description

Total number of  items (points) the groups contain.

Important

ITEMS is not the number of items available from the OPC server. It is the number of items that OPC clients have requested the values for.

The same item may appear in more than one group (or be referenced by more than one OPC client). Each reference is counted in this statistic.

5

PERIOD

Point ID

\\STATISTICS\PERIOD.VALUE

Description

How often the Toolkit updates the statistics

1000 = 1 second.

6

READS

Point ID

\\STATISTICS\READS.VALUE

Description

Number of read requests have been made by attached clients in the last sample PERIOD (second).

A read transaction is composed of one or more items and may be a cache read or device read.

Note: Cache reads are very efficient and do not typically cause significant CPU loading problems.)

7

RUNNINGPROJECTS

Point ID

\\STATISTICS\RUNNINGPROJECTS.VALUE

Description

Number of projects attached to the OPC Server that are running.

8

TOTALPROJECTS

Point ID

\\STATISTICS\TOTALPROJECTS.VALUE

Description

Total number of projects attached to the OPC Server, running and not running.

9

WRITES

Point ID

\\STATISTICS\WRITES.VALUE

Description

Number of write requests (set points) that have been made by attached clients in the last sample PERIOD (second).

Option 2. Use runtime statistics.