ISPSoft User Manual

Chapter 9 Function Block Diagram
Example 2: The contacts M0, M1, and M2 are assigned to the AND block, and the result of the
operation is sent to M3. In other words, after M0, M1, and M2 are connected in series,
the coil M3 will be driven if M0, M1, and M2 are ON.
Example 3: The use of an AND block and an OR block in a function block diagram is equivalent to
the use of a serial connection and a parallel connection in a ladder diagram.
• Inserting an AND/OR block
(1) Select a position into which an AND/OR block will be inserted in the working area. Users are
allowed to insert AND/OR blocks into the positions marked with red frames in the figure
below.
(2) In addition to the structure in the figure above, users may be allowed to insert an AND/OR
block into another structure. If users are allowed to insert an AND/OR block into the position
selected, / on the toolbar can be clicked.
After
is clicked, an AND block will be inserted.
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