Overview
AVEVA Plant SCADA receives time stamped variable data from OFS via OFSOPC driver and provides a display of:
Time stamped data
Time quality
Diagnostic information
The time quality information can be viewed on the and pages for AVEVA Plant SCADA.
AVEVA Plant SCADA minimizes the chance of time stamped data loss by replicating event data between redundant I/O server instances.
More details on AVEVA Plant SCADA configuration are provided in AVEVA Plant SCADA User Guide and AVEVA Plant SCADA Help. More details on redundancy configuration are provided in chapter Building Redundancy Into Your System of AVEVA Plant SCADA User Guide or AVEVA Plant SCADA Help, and in topic Configuring Redundancy of OFSOPC Driver html help file.
At source time stamping functionality and time quality is natively displayed from AVEVA Plant SCADA. It is supported by OFSOPC driver from version v2.05.09.001.
Variable Tag Configuration
A variable tag needs to be configured in AVEVA Plant SCADA to represent the corresponding time stamped variable in the PLC. The variable tag provides access to the current time stamped OPC item value, quality, and timestamp.
To configure a time stamped digital alarm, set the variable tag data type to .
More details on device communication setup and variable tag configuration is provided in the Setting up device communication and Configuring variable tags sections of OFSOPC help document.
Example of variable tag configuration screen:
Time Stamped Digital Alarm and Equipment Configuration
A time stamped digital alarm need to be configured in AVEVA Plant SCADA in order to display time stamped event data on the or page. The alarm is associated with the variable tag which receives time stamped event data.
It is recommended to add static information such as time stamped event source location in one of the 8 fields available (for example BMX CRA @IP address or Ethernet connection point @IP address used to reach the BMX ERT).
The name of the equipment on which the I/O is connected to generate the event (PLC1.Breaker1 for example) can be entered in the field or directly in the equipment database with AVEVA Plant SCADA.
More details on time stamped digital alarm configuration is provided in the Time-stamped Digital Alarm Properties section of AVEVA Plant SCADA User Guide or AVEVA Plant SCADA Help, and details on the equipment configuration is provided in the Using Equipment section of AVEVA Plant SCADA User Guide or AVEVA Plant SCADA Help.
Example of time stamped digital alarm configuration screen:
Example of equipment configuration screen:
