Mitsubishi Electric MELSEC Q Series Programming Manual page 90

Element
Function return value
output
Function inverted
argument input
Function inverted return
value output
*1 Not applicable in FBD.
*2 A contact performs an AND operation or OR operation according to the connection of a ladder block and reflects in the operation result.
For a series connection, it performs an AND operation with the operation result up to that point, and takes the resulting value as the
operation result.
For a parallel connection, it performs an OR operation with the operation result up to that point, and takes the resulting value as the
operation result.
Parallel-connection contact
*3 Supported with GX Works2 Version 1.15R or later.
For the confirmation method of the version of GX Works2, refer to the following manual.
 GX Works2 Version 1 Operating Manual (Common)
The performance of return differs depending on the programs, functions, and function blocks being used.
• When used in the programs
End the execution of POUs
• When used in the functions
End the functions. Also, return to the next step of the instruction which called the functions.
• When used in the function blocks
The performance differs depending on whether "Use Macrocode" is checked or not on the Property screen.
When it is checked, end the execution of POUs.
When it is not checked, end the function blocks. Also, return to the next step of the instruction which called the
functions.
5 WRITING PROGRAMS
88
5.2 Structured Ladder/FBD
Ladder symbol Description
Outputs the return value from a function or function block.
Inverts and inputs an argument to a function or function block.
Inverts the return value from a function or function block and outputs it
Series-connection contact
( )