Manual

LogicPro User’s Guide Chapter 8: Ladder Diagrams
Doc.# 28002-00 Rev 3.00 Watlow Anafaze 91
Figure 8.7 Ladder Diagram Before Elements
Are Added to Function Block
Figure 8.8 Ladder Diagram After Elements
Are Added to Function Block
Function Blocks with More Than One Input and Output Bit
Some Function Blocks have more than one input and output
logical bit. For example, the CTUD (Counter Up Down)
Function Block has four logic input bits (CU, CD, R, LD) and
two logical bits (QU and QD) on the output side, as shown in
Figure 8.9 on page 92.
To insert a new element between the left power rail and the
second or lower logical input:
1. Select the element type from the toolbar.
2. Click and hold on the right side of the left power rail
directly across from the logical input of the Function
Block. Handles appear on the left power rail to indicate
that you have selected the correct part of the rail.
3. Drag the line to the connecting point on the Function
Block.
4. Release the mouse button. A rung appears with the
element on it, as shown in Figure 8.10 on page 92.