CJ1W-EIP21 Omron, CJ1W-EIP21 Datasheet - Page 412

• Manufacturer Part Number: CJ1W-EIP21
• Description: Ethernet I/P Module
• Manufacturer: Omron

Specifications of CJ1W-EIP21

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

According to CIP Specifications, the Segment Type specifications are decided as follows:
The specifications of Segment Format are different for each Segment Type.
The following sections describe Port Segment, Logical Segment, and Data Segment which are needed to use
the CIP message communications instructions.
Port Segment
The Port Segment is used to specify the path described above.
Set the ID of the port in Port Identifier.
The Port Identifier is 4 bits, so it can have a value between 0 and 15. A port identifier of “0” is reserved and not
available. A port identifier of “1” indicates the backplane port.
A port identifier of “15” has a special meaning, which indicates that the size of Port Identifier is larger than
1 byte, and the 4-bit port identifier (15) is followed by 2-byte Port Identifier. The port identifier does not exceed
1 byte when using the EtherNet/IP Unit or built-in EtherNet/IP port, so this special case is not explained here.
Set the Extended Link Address Size to “1” when that port’s Link Address is larger than 1 byte.
The following diagram shows the Port Segment value when the Extended Link Address Size is set to “0.”
384
CIP Message Communications
0
0
0
0
1
1
1
1
7
Segment Type
0
0
1
1
0
0
1
1
Segment Type
Segment Type
7
0
7
0
6
6
0
6
0
0
1
0
1
0
1
0
1
5
0
5
0
5
Port Segment
Logical Segment
Network Segment
Symbolic Segment
Data Segment
Data Type
Data Type
Reserved
Extended Link
Extended Link
Address Size
Address Size
4
4
0
Description
3
3
Port Identifier
Port Identifier
2
2
1
1
0
0
7
6
Link Address
5
4
3
2
1
0
Appendix D