The GagePort Mitutoyo OPC Server has several pre-defined Item ID's used for referencing server performance statistics. The Item ID for each statistic is listed below. An OPC client can reference a statistic to monitor the performance of the OPC Server. Refer to the section "Runtime Statistics" for more information on working with the statistics.
Note:
Statistic Item IDs follow the same naming convention as a device
point. The statistics are assigned to a "fictitious" serial port
called STATISTICS.
|
Item ID |
Description |
|
STATISTICS.CLIENTS.VALUE |
Displays the number of OPC clients currently connected to the CIMPLICITY OPC Server. |
|
STATISTICS.GROUPS.VALUE |
Displays the number of OPC groups currently configured in the OPC Server. |
|
STATISTICS.ITEMS.VALUE |
Displays the number of OPC item references currently configured in the OPC Server. Note that an item may appear in more than one group (or be referenced by more than one OPC client). Each reference is counted in the statistic. |
|
STATISTICS.READS.VALUE
|
Displays the number of synchronous and asynchronous read transactions performed by the OPC Server in the last sample period. A read transaction is composed of one or more items. |
|
STATISTICS.WRITES.VALUE
|
Displays the number of synchronous and asynchronous write transactions performed by the OPC Server in the last sample period. A write transaction is composed of one or more items. |
|
STATISTICS.EVENTS.VALUE
|
Displays the number of client subscription updates (i.e. unsolicited updates to an OPC client) performed by the OPC Server in the last sample period. A single subscription update is composed of one or more items. |
|
STATISTICS.PERIOD.VALUE |
The currently configured sample period for calculating reads/period, writes/period, and subscriptions/period statistics. |
|
|
GagePort Mitutoyo OPC item naming convention. |
