8 CIP Message Communications
8-42
NJ/NX-series CPU Unit Built-in EtherNet/IP Port User’s Manual (W506)
A logical segment is used to give the range of the CIP Object or variable (array) in the request path.
An 8-bit or 16-bit logical address can be used for the class ID and attribute ID.
An 8-bit,16-bit, or 32-bit logical address can be used for the instance ID.
8-4-3 Logical Segment
Logical Type
Meaning
4 3 2
000Class ID
0 0 1 Instance ID
010Member ID
0 1 1 Connection Point
1 0 0 Attribute ID
1 0 1 Special (Do not use the logical addressing definition for the Logical Format.)
1 1 0 Service ID (Do not use the logical addressing definition for the Logical Format.)
111Reserved
Logical Format
Meaning
1 0
0 0 8 bit logical address
0 1 16 bit logical address
1 0 32 bit logical address
11Reserved
Segment Type Logical Type
7 6 5 4 3 2 10
0 0 1
Logical Format
Segment Format Bits