10-4-2
Logical Segment
A logical segment is used to give the CIP Object in the request path.
Segme
nt Type
Logi
cal Type
7 6 5 4 3 2 1 0
0
0 1
Logical Forma
t
Segment Fo
rmat Bits
Logical Type
Meaning
4 3 2
0 0 0 Class ID
0 0 1 Instance ID
0 1 0 Member 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.)
1 1 1 Reserved
Logical
Format
Meaning
1 0
0 0 8 bit logical address
0 1 16 bit logical address
1 0 32 bit logical address
1 1 Reserved
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.
10 CIP Message Communications
10-27
NX-series EtherNet/IP Unit User's Manual (W627)
10-4 Specifying Request Path
10
10-4-2 Logical Segment
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