ISPSoft User Manual

Chapter 9 Function Block Diagram
(e) One node represents a symbol whose data type is WORD/DWORD/LWORD, and the other
node represents a symbol whose data type is INT/DINT/LINT. The data length of the output
node must be larger than or equal to the data length of the input node.
(f) Both nodes represent symbols whose data types are REAL/LREAL/STRING. The data lengths
of the nodes must be the same.
(g) If an input node has multiple output nodes, the output nodes must conform to the rules listed
above. 32 output nodes at most form a group. After users add an output node rightward, they
can create another group of output nodes.
• Graphical representation
• Example
Example 1: The state of the contact M0 is sent to M1.
Example 2: The data in D0 is sent to D1.
Example 3: There are three groups of output nodes. The first group begins with M100, the second
group begins with M200, and the third group begins with M300. 32 output nodes at
most form a group. After users add an output node rightward, they can create another
group of output nodes. There is no limit on the number of output nodes which can be
added rightward.
Example 4: Some incorrect examples are listed below.
Incorrect example
Description
The data type of the input node must not be different from
the data type of the output node.
The data length of the output node must not be less than
the data length of the input node.
The value of a symbol whose data type is REAL can not
be sent to a D device.
If the input node represents a symbol whose data type is
REAL, the output node must represent a symbol whose
data type is REAL. If the input node represents a symbol
whose data type is LREAL, the output node must
represent a symbol whose data type is LREAL.
The data length of the input node representing a symbol
whose data type is STRING and the data length of the
output node representing a symbol whose data type is
STRING must be the same.
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