Omron NX-SL3500

Input parameters
Output parameters
Function block name
Instance name
Settings of a function block instance in a program
Internal variables
Input variable Output variable
Created in the function definitions
Local Variable Table
Algorithm
 Programming in the FBD language
 Any instructions and user-defined
function blocks can be used
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Function Block Name or Instruction Name
This is the name of the user-defined function block or the instruction.
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Instance Name
You give an instance name to a function block instance in a program to enable managing it.
You specify an instance name when you call a function block definition from a program or another
function block.
l
Algorithm
Algorithms are programmed in the FBD language.
You cannot use the ladder diagram language (LD) or the structured text language (ST).
Y
ou can use any instructions or user-defined function blocks in the algorithm.
l
Local Variable Table
The local variable table contains the definitions for input variables, output variables, and internal
variables.
l
Parameters
• Input Parameters to Input Variables
An input parameter passes a value to an input variable in a function block when function block
execution begins. An input parameter can be either a variable or a constant.
• Output Parameters from Output Variables
An output parameter receives a value from an output variable in a function block when function
block execution is completed. A variable is given as the parameter.
Additional Information
You can omit input and output parameters. For details on the operation, refer to the NX-series
Safety Control Unit Instructions Reference Manual (Cat. No. Z931).
6 Programming
6 - 7
NX-series Safety Control Unit User's Manual (Z930)
6-1 POUs (Program Organization Units)
6
6-1-5 Details on Function Blocks