Yaskawa MP900 Series Ladder Programming Manual - Manual (Page 351)

5.11 C-language Control Instructions
5.11.1 Call C-language Function (C-FUNC)
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The parameters are described in the following table.
∗ This error is detected even when Execute is OFF.
( 3 ) Programming Example
In the following programming example, the CFUNC1 C-language function is executed.
First the CFUNC1 C-language function is loaded into the Controller.
Next, when the C-FUNC execution command (MB000000) turns ON, the CFUNC1 C-language function is executed
by the C-FUNC instruction.
The MA00100 and MA00200 addresses are passed to the C-language function as the arguments and the return value
from the function is set in DL00002. Options 1 and 2 are not used, so 0 is set for them.
Parameter Name Description I/O
Execution flag (Execute) The C-FUNC function is executed when this command turns ON. IN
Option 1 (Option1) Option specification 1 (for future use) IN
Option 2 (Option2) Option specification 2 (for future use) IN
Function name (C_Name)
Specify the first register address to pass to argument 1 of the user C-language
function.
IN
Argument 1 (C_Arg1)
Specify the first register address to pass to argument 1 of the user C-language
function.
IN
Argument 2 (C_Arg2)
Specify the first register address to pass to argument 2 of the user C-language
function.
IN
Completion flag (Complete) Turns ON when execution of the C-FUNC function is completed. OUT
Error flag (Error)
Turns ON when one of the following errors occurs.
• Register limit exceeded for C_Name, C_Arg.1, or C_Arg.2. *
The sizes of C_Arg.1 and C_Arg.2 are not considered.
• The function specified by C_Name does not exist.
OUT
Return value (Return) Stores the value that is returned by the user C-language function. OUT