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How to read Part 5 and Part 6
The following illustration is for explanation purpose only, and should not be referred to as an actual documentation.
Function symbol
A function symbol followed by parentheses indicates multiple functions or function blocks. For example,
"BOOL_TO_DINT(_E)" includes two functions: "BOOL_TO_DINT" and "BOOL_TO_DINT_E".
Availability by the CPU module type (The function or function block cannot be used by the CPU module marked .)
Description formats of ladder diagram, structured text language, and FBD/LD
In the enclosed area, either of the following symbol should be described.
• Standard function: Function symbol
• Standard function block: Instance name and function block symbol
Execution condition is input to EN of each standard function or function block. And, execution result is output from ENO of
each standard function or function block.
The return value of functions are not displayed in FBD/LD programs.
For instances, refer to the following.
MELSEC iQ-R Programming Manual (Program Design)
Function symbol Meaning
Function symbol followed by "(_E)" This standard function or standard function block can write program with EN/ENO.
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