Omron CS1W-FLN22 Operation Manual page 244

FL-net Profile
Supplementary Profile Information
Summary of ASN.1 Transfer Syntax Format
A summary of the basic encoding rules for ISO/IEC 8825 ASN.1 (Abstract Syntax Notation One) relevant to FL-
net are provided below.
Simple Format: ASN.1
Type
Length
Structure Type Example with Signed ASN.1
Type Length
Type Field
• Structure (Single Octet)
Structured type flag: 0 = Primitive type
C C F
8 7 6 5
Tag class 00 UNIVERSAL TAG
01 APPLICATION TAG
10 CONTEXT-SPECIFIC TAG
11 PRIVATE TAG
• Tag Number (UNIVERSAL TAG)
Tag number
(hexadecimal)
00 (Reserved.)
01 BOOLEAN
02 INTEGER
03 BIT STRING
04 OCTET STRING
05 NULL
06 OBJECT IDENTIFIER
07 ObjectDescriptor
08 EXTERNAL
09 REAL
0A ENUMERATED
0B to 0F (Reserved.)
10 SEQUENCE and SEQUENCE OF 1D to 1E
218
Value
Length Value
Type
1 = Constructed type
Tag number
4 3 2 1
Type
Value
Length
Type
Tag number
(hexadecimal
11 SET and SET OF
12 NumericString
13 PrintableString
14 TeletexString
15 VideotexString
16 IA5String
17 UTCTime
18 GeneralizedTime
19 GraphicString
1A VisibleString
1B GeneralString
1C CharacterString
(Reserved.)
Appendix E
Value
Type