OPC-UA Protocol
1. Enter Simple Connector Page
Click the plus sign next to the channel list to add the OPC-UA protocol.
2. Add PLC connection under the channel
After adding a channel with the OPC-UA protocol, click the plus sign to the right of the channel name to add a PLC connection under it.
After selecting the equipment instance, you need to fill in the PLC information.
| Field | Description |
|---|---|
| Equipment Instance | Select the equipment instance under this channel. |
| Endpoint URL | The OPC-UA connection IP address and port number. |
| Anonymous Login | Whether password login is required. If not anonymous login, then username and password need to be filled in. |
| Username | The username for the OPC-UA connection. |
| Password | The password for the OPC-UA connection. |
3. After adding, you can see the added PLC connection under this channel.
4. Add tags to PLC
Select the PLC connection, and click "Add Tag" on the right.
| Field | Description |
|---|---|
| Tag Name | The name of the tag. |
| Type | Normal tag or product type tag. The product type tag is used for the system to automatically collect and locate the product model. Normal tag is used for storing real-time data, and be retrieved by the system. |
| Address | The address of the PLC data tag. |
| Data Type | The data type of the PLC data tag. |
| Scan Interval | The time interval to scan the PLC tag. It is applicable when there is a need to subscribe the tag, and this will be the minimum interval to detect the tag value change. |
| Access Mode | Select whether the PLC data tag is read-only or read-write. |
After completion, the tags you added will be displayed on the right side. Tags with the "P" character icon represent that it is a tag to store product type info.
5. Connectivity Test
After adding device tags, we can test the tags to see if they can connect to the PLC.
An access status of "Success" indicates that it can connect to the PLC, meaning the tag is functioning correctly.
If it shows "Failure", this means the PLC tag cannot be read, there is a connection issue.
Click "Write" to perform a write test (only tags with a read/write mode set to "Read/Write" can be used for write testing).
After filling in the data value and submitting, a "Write successful" message will be displayed upon successful writing.
