Watlow LogicPro - Manual (Page 185)

LogicPro User’s Guide Chapter 11: User Defined Function Blocks
Doc.# 28002-00 Rev 3.00 Watlow Anafaze 169
6. Define the Variables that will be used as inputs and
outputs, as well as internally by the Function Block.
Refer to “In’s, Out's and Internals”
below .
7. Click [OK] to create the new UDFB
– or –
[Cancel] to terminate the process.
Figure 11.1 New UDFB Dialog Box
In’s, Out's and Internals
IN's - contains the symbol and type of Inputs to the UDFB.
OUT’s - contains the symbol and type of Outputs from the
UDFB.
Internal - contains the symbol and type of internal
assignment. They may also be used as extra inputs and
outputs, but they will not be displayed. The major differences
between Internals and Ins are that internals are:
• Not displayable in Ladder diagrams.
• Only constants.
NOTE! Variables can be used, but not changed on-line.
The symbol is the name of the particular input, output or
internal when the UDFB is graphically represented in the
Ladder diagram, and must be unique within the UDFB.
LogicPro does not allow two symbols of the same name in one
UDFB.