Omron NX Series User Manual

Instruc-
tions
Name Description
Communica-
tions method
CIPOpen Open CIP Class 3
Connection
(Large_For-
ward_Open)
Opens a CIP class 3 connection (Large_Forward_Open)
with the specified remote node.
CIP class 3
connection
message
CIPOpen-
W
ithData-
Size
Open CIP Class 3
Connection with
Specified Data Size
Opens a CIP class 3 connection with the specified re-
mote node that allows class 3 explicit messages of the
specified data length or shorter to be sent and received.
CIPSend Send Explicit Mes-
sage Class 3
Sends a specified class 3 CIP command to the specified
remote Controller on the CIP network.
Refer to
10-2-8 Response Codes on page 10-19 and
10-5 CIP Object Services
on page 10-28 for informa-
tion on the service codes and response codes that are
used with the NJ/NX-series CPU Units.
CIPClose Close CIP Class 3
Connection
Closes the CIP class 3 connection that is specified by
the handle.
10-2-3
Using CIP Communications Instructions
CIP message communications include the following processes.
If CIP class 3 connections are used, the open and close processes are required before and after the
data is sent and received.
Process Description Instruction
Open process
(only for CIP class 3 con-
nections)
*1
Execute this process before you use a CIP message.
Open processing is continued until a CIP class 3 con-
nection is established.
CIPOpen
CIPOpenWithData-
Size
Sending CIP commands You can set the required CIP command. CIPUCMMSend
CIPSend
Close process
(only for CIP class 3 con-
nections)
This process closes the connection. CIPClose
*1. The maximum number of connection handles that you can obtain simultaneously through the opening proc-
ess is 32. Even if a connection is disconnected for a timeout, the handle is not released. Execute the CIP-
Close instruction to close the connection.
Precautions for Correct Use
You can execute up to 32 CIP communications instructions at the same time regardless of the
instruction types.
Use exclusive control in the user program so that the number of CIP communications instruc-
tions executed at the same time does not exceed the above number.
10-2-4
Route Path
The route path indicates the path from the source Controller of CIP communications instructions to the
destination Controller on the network.
Routing for CIP communications instructions is performed based on the route path. Set the route path
in the RoutePath input variable of the CIP communications instructions.
10 CIP Message Communications
10-4
NX-series EtherNet/IP Unit User's Manual (W627)

Omron NX Series Specifications

General

Programming Languages	Ladder, Structured Text, Function Block Diagram, Sequential Function Chart
Communication Ports	Ethernet, USB, RS-232C, RS-485
Memory Capacity	Varies by model
Program Memory	Varies by model
Data Memory	Varies by model
Operating Temperature	0°C to 55°C
Power Supply	24 VDC
Ethernet Ports	1 or 2 ports (depending on model)
USB Ports	1 or 2 ports (depending on model)
Dimensions	Varies by model
Weight	Varies by model