Connecting to OPC/UA Server

This section describes the steps to configure the OPC UA Server Settings in the display unit.

1. In Project Explorer window, go to [System Architecture] and click [Target01].
2. In Properties window, go to [Advanced] tab ➞ [Data Access] tab and click [OPC UA Server].
3. Select [Enable] and configure the below properties:

   Property	Description
   [Transport Protocol]	Select the transport protocol.
   [Port Number]	Set the Port Number for data communication.
   [Data Format]	Select the Data Format.
   [Security Policy]	Select required [Security Policy]. You can select [No Security] for communicating with the OPC UA Server without security. We recommend you to set the security policy. The following Security Policies are supported: No Security Aes256Sha256RsaPssSignAndEncrypt Aes256Sha256RsaPssSign Aes128Sha256RsaOaepSignAndEncrypt Aes128Sha256RsaOaepSign Basic256Sha256SignAndEncrypt Basic256Sha256Sign Basic256SignAndEncrypt Basic256Sign Basic128Rsa15SignAndEncrypt Basic128Rsa15Sign We recommend using one of the higher security policies based on AES (Advanced Encryption Standard), such as [Aes128Sha256RsaOaepSign].
   [Trusted Certificates] [Issuers Certificates]	Choose the desired option from following and set [Number of Certificates] and [Number of CRL]. [Trusted Certificates]: Use this for Self-signed or CA Certificates needed to be verified.   [Issuers Certificates]: Use this for CA certificates needed to be verified by a chain of CA. [Number of Certificates] Set the [Number of Certificates] and select the certificate file from [Certificate File Path]  . If no security is selected in [Security Policy], then no need to set [Number of Certificates]. Note: The maximum number of certificate files is 100. The file, which is already used in other [Certificate File Path] of [Trusted Certificates] or [Issuers Certificates], cannot be used. Even if the file has different name and same content with other, the file cannot be used. [Number of CRL] Set the [Number of CRL] and select the CRL (Certificate Revocation List) file from [Certificate File Path]. Note: The number of CRL files is equal to or less than the number of certificate files. The file, which is already used in other [Certificate File Path] of [Trusted Certificates] or [Issuers Certificates], cannot be used. Even if the file has different name and same content with other, the file cannot be used.
   [Security Setting]	When restricting the user according to the user access level of OPC UA, select [Enable] and set the security level. The user access level is as follows: User Access Level Description [Security Level For Browse] User can see the Server properties and variable names. [Security Level For Read] User has Browse level privilege and can see variable value. [Security Level For ReadWrite] User can Read/Write variable value. This includes Read level privilege.
   [Node ID Naming Format]	Select the naming format for variables shared by the OPC UA server with external devices on the network. [Simplified]: (default) Naming format consistent with OPC UA naming conventions. [Compatible]: Naming format compatible with screen editing software 3.3 Service Pack 1 or earlier. Note: You cannot use binding or script to dynamically change the value of this property. Variable Name Node ID Naming Format [Compatible] Version 3.3 Service Pack 1 or earlier [Simplified] Version 3.4 or later Var1[0] Target01.Var1.Var1[0] Target01.Var1[0] Var1[1,1] Target01.Var1.Var1[1,1] Target01.Var1[1,1] Var2.BOOL1 Target01.Var2.Var2.BOOL1 Target01.Var2.BOOL1 Folder1.Var1[0] Target01.Folder1.Var1.Folder1.Var1[0] Target01.Folder1.Var1[0] Changing the [Node ID Naming Format] may cause references by other devices on the network to not work anymore.
   [Save in] [Destination Folder]	Set the export destination of the OPC UA server certificate, which is used for the pre-registration of OPC UA clients. [Save in]: Select either external storage or local storage as the export destination. [Destination Folder]: Specify up to 256 characters for the path of the export destination. Use single-byte or multi-byte characters in the path, except for the following special characters. * ? " < > | Note: The OPC UA server certificate is exported from the hardware configuration screen. From the hardware configuration screen, open [OPC UA Server] and from the [Certificate: Export Certificate] field, touch the [Export] button. If the OPC UA server certificate needs to be regenerated as a result of it expiring or other reasons, from the [Regenerate Certificate] field, touch the [Generate and Reboot] button. Once the certificate is regenerated, previously exported OPC UA server certificates become invalid.

4. In Project Explorer window, click [All Variables] and create a variable.

5. Select the required option to share the variable data from [Data Sharing].

   Note: The OPC UA server cannot share the value of local variables on a screen. If you want to share the value of a local variable, associate the value of the local variable as a binding source to an internal variable set to [Data Sharing].

An Effective Data Type

The following data type can be used. The data type descriptions are different from OPC UA.

*1 When using a string variable with its [Variable Length] property enabled, the variable can store up to 512 bytes (UTF-8 encoding).

OPC UA Server's Certificate details

*1 When using OPC UA Server on Windows OS, it is displayed Windows' computer name instead of IP Address.

OPC Foundation Certified Details