Allen-Bradley ControlLogix 1756 - IREF and OREF Guidelines; IREF and OREF Examples

Publication 1756-RM084F-EN-P - July 2002
Entering Function Block Diagram Logic 5-7
Where:
IREF and OREF guidelines
•
If the Operand is not a qualified tag or literal value, the
IREF/OREF will not be verified.
•
The X and Y grid locations are a relative position from the
upper-left corner of the sheet. X is the horizontal position; Y is
the vertical position.
IREF and OREF examples
IREF (ID := 8,
X := 200,
Y := 380,
Operand := PMUL_InitVal)
END_IREF
OREF (ID := 9,
X := 480,
Y := 340,
Operand := FB_PMUL)
END_OREF
Item: Identifies:
ID
the IREF or OREF identifier; uniqueness is important for
wiring
enter unsigned, 32-bit integer value
Specify:
ID := ” number ”
X
x-coordinates on internal grid
enter unsigned, 32-bit integer value
Specify:
X := ” number ”
Y
y-coordinates on internal grid
enter unsigned, 32-bit integer value
Specify:
Y := ” number ”
Operand
the reference (optional)
enter tag or literal value for IREF; enter tag for OREF
Specify:
Operand := ” tag ”
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