Yaskawa MP940 - Manual (Page 76)

3.5 Functions
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3.5.2 Creating User Functions
The body of the function (program) and the function definitions can be set by the user. The
maximum number of user functions is 32 per drawing.
The methods for creating user functions is explained according to the following procedure.
• For details on CP-717 operations, refer to MP9 †† Machine Controller User’s Manual Program-
ming Panel Software (SIEZ-C887-2.3 (for simple operation) (To be prepared), SIEZ-C887-2.4 (for
standard operation) (To be prepared)).
• For details on using instructions such as FSTART, refer to MP9 †† Machine Controller User’s
Manual Programming (SIEZ-C887-1.2).
3.5.3 Determining the I/O Specifications
When a user function is created, the function capabilities, the number of inputs and outputs
required to satisfy the function, and other specifications must first be determined. Determine
the four types of specification shown in the following table.
Table 3.8 Overview of Function Definition Values
∗ Indicates the number of pointers to be provided for the external function
registers used by the function.
Determining I/O Specifica-
tions
Determine the number of inputs and outputs and the data
types.
Defining Function I/O Input using the CP-717.
Programming the Function
Prepare in the same way as the drawings, except that differ-
ent registers are used. Program according to the correspon-
dence between the register numbers used in the body of the
function program and the I/O data used when calling the
function.
Preparing the Program for
Calling the Function
Input using the following procedure:
1. Use the FSTART instruction to input the function name.
2. Use the FIN instruction to connect the input data.
3. Use the FOUT instruction to connect the output data.
INFO
Specification to be
Determined
Overview
Function Name Up to eight characters can be input.
Number of Inputs The number of arguments input into a function. Up to 16 can be
input.
Up to 17 arguments are possible if the address input is also counted.
Number of Address
Inputs* The designated number of addresses required by the function. A
maximum of one value can be input.
Number of Outputs The number of outputs from the function. Up to 16 can be input.