Omron NX-SID800 User Manual

7 Programming
7 - 10
NX-series Safety Control Unit User’s Manual (Z930)
You can access the input and output variables of a function block from outside the function block. Vari-
ables are written as follows:
InstanceName.VariableName
Example: To Access Output Variable B of Function Block Instance FB1_Instance
You can access the input and output variables for a function block only within the program that contains
the function block instance. However, you cannot access these variables from within other function
block instances even if they are in the same program. You cannot access them from other programs.
You cannot create user-defined functions for Safety Control Units. Only system-defined functions
(instructions) are allowed.
With the FBD language, functions are represented as rectangular boxes as shown below. A function
consists of the following parts. This function is expressed in the FBD language:
 Instruction Name
This is the instruction name.
 Instance Name
Functions do not have instance names.
Accessing Variables in a Function Block from Outside the Function
Block
7-1-6 Details on Functions
Structure of Functions
FB1_Instance
FB1_Instance.B
FB1_Instance.B
FB1
B
Instruction name
Output paramete
r
Input parameters
AND
Para1
Para2
Output1

Omron NX-SID800 Specifications

General

Brand	Omron
Model	NX-SID800
Category	Controller
Language	English