Creating Virtual Data Objects In The Logic Processor Ied - ABB COM600 series 5.1 User Manual

1MRS756738
3.5.
COM600 series 5.1
Logic Processor User's Manual
Figure 3.4-2 The Cross references tool
4. Click the desired Data attribute in the tree, and click Apply to confirm the change
change in the table.
5. The Direction field is used for setting the direction of the value transfer, either from
data object data attribute to logic variable (->) or from logic variable to data object
data attribute (<-).
6. After completing the configuration of cross-reference, click Save to save the changes,
and close the Cross References tool.
The following special attribute names can be used in addition to those available in the
source data objects:
•
With SPS and SPC: attribute EaCnt, that is incremented with 1 each time stVal is
updated with the value True. The value is reset to 0 each time stVal is updated with
the value False. This allows logic processor to catch several consecutive updates
of the object with the value True.
• With SPC: new attribute EiCtlVal with the type Integer (VT_I4). It behaves as
ctlVal, so that writing a value > 0 corresponds to writing True to ctlVal. Writing
a value <= 0 corresponds to writing False to ctlVal. This allows logic to control
multiple times to the same direction, for example, by writing values 1, 2, 3, and so
on for True and 0, -1, -2, and so on for False.
Creating virtual data objects in the Logic Processor
IED
Cross references are used to enable communication through OPC DA access, to a PLC
Application executing in Logic Processor. Typical cross references scenarios include:
• Transferring status/monitoring data from an OPC communication server (for example
DNP/IEC 61850) that is defined in SAB communication structure to a PLC
Application to trigger a logic,
Adding_Cross-references.png
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