1 Introduction to Instructions for Safety Control Units and Interpreting Instruction Descriptions
1 - 4
NX-series Safety Control Unit Instructions Reference Manual (Z931)
The Safety Control Unit classifies the following two data types to distinguish between safety signals and
standard signals.
• Safety data types: These data types represent signals related to safety control.
• Standard data types: These data types represent signals related to standard control.
The safety data type variables are prefixed with the “SAFE” before the name of the standard data type,
as in SAFEBOOL and SAFEBYTE.
You can input a signal for a safety data type variable to a standard data type variable. You cannot input
a signal for a standard data type variable to a safety data type variable. A building error will occur.
The valid range of a variable indicates the range of values that variable can take. The default value of a
variable indicates the value that is assigned to an input variable when the instruction is executed with-
out a parameter assigned to the input variable. These values are defined for each data type. If specific
values are not given for an instruction, then the valid ranges and default values of the data types are
applied. These variables are indicated by “depends on data type” in the valid range column of the table
that describes the variables and by “---” in the input variable default column. The valid ranges and
default values of the data types are given in the following tables.
Function
The function of the instruction is described.
Additional Informa-
tion
Additional information on the function of the instruction is provided. This includes related
instructions and helpful information for application of the instruction.
Precautions for Cor-
rect Use
Precautions for application of the instruction are given. The conditions under which errors
occur for the instruction are also given here.
1-2-2
Safety Data Types and Standard Data Types
1-2-3
Valid Ranges and Default Values of Variables
Classification
Safety/standard
data type
Data type
Range of values
Default
Boolean
Standard data
type
BOOL
TRUE or FALSE
FALSE
Safety data type
SAFEBOOL
Bit strings
Standard data
type
BYTE
byte#16#00 to byte#16#FF
byte#16#00
Safety data type
SAFEBYTE
Standard data
type
WORD
word#16#0000 to
word#16#FFFF
word#16#0000
Safety data type
SAFEWORD
Standard data
type
DWORD
dword#16#00000000 to
dword#16#FFFFFFFF
dword#16#00000000
Safety data type
SAFEDWORD
Integers
Standard data
type
INT
int#−32768 to int#32767
int#0
Safety data type
SAFEINT
Standard data
type
DINT
dint#-2147483648 to
dint#2147483647
dint#0
Safety data type
SAFEDINT
Durations
Standard data
type
TIME
t#0ms to t#2147483647ms
and t#0d0h0m0s0ms to
t#24d20h31m23s647ms
t#0s
Safety data type
SAFETIME
Item
Description
Содержание NX-SL series
Страница 8: ...CONTENTS 6 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 14: ...Terms and Conditions Agreement 12 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 28: ...Sections in this Manual 26 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 98: ...2 Standard Functions 2 64 NX series Safety Control Unit Instructions Reference Manual Z931 ...
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Страница 130: ...3 Safety Standard Function Blocks 3 20 NX series Safety Control Unit Instructions Reference Manual Z931 ...
Страница 265: ...I 1 I NX series Safety Control Unit Instructions Reference Manual Z931 Index ...
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