User manual OMRON CJ1W-EIP21 REV 02-2010

[. . . ] W465-E1-05 SYSMAC CS and CJ Series CS1W-EIP21 (100Base-TX) CJ1W-EIP21 (100Base-TX) CJ2H-CPU6@-EIP (100Base-TX) CJ2M-CPU3@ (100Base-TX/10Base-T) EtherNet/IP Units OPERATION MANUAL CS1W-EIP21 (100Base-TX) CJ1W-EIP21 (100Base-TX) CJ2H-CPU6@-EIP (100Base-TX) CJ2M-CPU3@ (100Base-TX/10Base-T) EtherNet/IP Units Operation Manual Revised February 2010 iv Notice: OMRON products are manufactured for use according to proper procedures by a qualified operator and only for the purposes described in this manual. The following conventions are used to indicate and classify precautions in this manual. Always heed the information provided with them. Failure to heed precautions can result in injury to people or damage to property. !DANGER !WARNING Indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. [. . . ] (See note. ) Set the routing tables with CX-Integrator, and transfer it to each PLC. Create a ladder program that includes the SEND(090), RECV(098), and CMND(490) instructions. Note Routing tables are required in the following situations: · When communicating with a PLC or computer on another network (e. g. , remote programming or monitoring using FINS messages or a CX-Programmer). · When multiple Communications Units are mounted to a single PLC (i. e. , CPU Unit). · When routing tables are used for one or more other nodes on the same network. It is not necessary to set routing tables if one Communications Unit is mounted to the PLC and the nodes are connected as one network. 201 FINS/TCP Method Section 8-3 8-3 8-3-1 FINS/TCP Method Overview The FINS/TCP method is a FINS communications method that uses the TCP/ IP protocol. TCP/IP is a connection-type communications protocol. Before a message is sent from one node to another, it is necessary to establish a virtual circuit, i. e. , a connection. Once a connection has been established, communications are quite reliable. The arrival of data that is sent via the connection is confirmed by an acknowledgement (ACK) response, and retries are executed automatically as required. When FINS/TCP is used, it must be determined which node is the server and which nodes are the clients. For communications between a personal computer and a PLC, the computer should normally be set as the client and the PLC as the server. For communications between two PLCs, either one can be set as the client and the other as the server. Node (Client) Node (Server) FINS/TCP Features Request to establish a connection Notification of establishing connection Acknowledgement Connection established Data transmission 1 Acknowledgement An acknowledgement is received whenever a connection is established or data is sent, so transmissions are more reliable but somewhat slower. Compared to the FINS/UDP method, the FINS/TCP method has the following characteristics. · Data transmission is more reliable, due to factors such as retry processing at the TCP/IP layer. The FINS/TCP method is thus better suited to dealing with communications errors in an IP network that spans several layers. · Remote clients can be restricted by means of settings at the server (i. e. , the server can be protected from access by non-specified IP addresses). · TCP/IP has various retry procedures, and this tends to lower its performance in comparison with UDP/IP. · There is a limit to the number of connections that can be made (i. e. , 16 connections maximum), and any given node can communicate only with up to 16 other nodes at a time. 202 FINS/TCP Method Section 8-3 · After a FINS/TCP connection (connection number, remote IP address) has been set in the FINS/TCP Tab Page of the Network Configurator's Edit Parameters Dialog Box, it can be dynamically changed from the ladder program using a FINS command (i. e. , FINS/TCP CONNECTION REMOTE NODE CHANGE REQUEST). FINS/TCP Frame Format The following diagram shows the structure of a TCP packet sent over an Ethernet network. Ethernet Ver. 2 IP TCP FINS/TCP header FINS frame FCS TCP packet As the diagram shows, a nested structure is used with the FINS/TCP method, i. e. , Ethernet Ver. 2, IP frame, TCP frame, FINS/TCP header frame, and FINS frame. A TCP data section (FINS/TCP header + FINS frame) that exceeds the segment size (default setting of 1, 024 bytes in the EtherNet/IP Unit or built-in EtherNet/IP port, with automatic adjustment for optimum values between the nodes) is split into TCP packets for transmission. The split TCP data is then joined automatically at the remote node's TCP/IP protocol layer. [. . . ] Select Control Panel from the Windows Start Menu and change the display to Classic View. 2. Open the Administrative Tools and select Windows Firewall with Advanced Security from the dialog box that is displayed. 3. Select Inbound Rules under Windows Firewall with Advanced Security on Local Computer on the left side of the Windows Firewall with Advanced Security Dialog Box. 4. Select New Rule under Inbound Rules in the Actions Area on the right side of the dialog box. 5. [. . . ]