node-red-contrib-opcda-client-dynamic 0.2.0

Node-RED OPC DA dynamic Reading and Writing Node

npm install node-red-contrib-opcda-client-dynamic

node-red-contrib-opcda-client

This node can be used in order to read and write to OPC DA servers.

This node is based on emrebekar/node-red-contrib-opcda-client, modified opcda-read.js.

• only valid tags is read for opcda-read when msg.payload tags is vaild.

msg.payload = { tags: ["dev1.wendu","dev1.yali"]
};

• for normal read( no payload tags ), only value changed tags will ouput when data change is checked. For example,devl.wendu and devl.yali were set,only devl.wendu value changed, opcda-read will only output devl .wendu

• for dynamic read ( payload tags valid ), data change check is useless , all payload tags will output.

• opcda-server

• opcda-read

• opcda-write

Input Parameters

opcda-server

Name (Optional)

Name of the OPC DA Server to be shown in node.

Address

Address of the OPC DA Server

Domain(Optional)

Domain of account if necessary.

Username(Optional)

Username of account if necessary.

Password(Optional)

Password of account if necessary.

ClsId

Class ID of the OPC DA Server.

Timeout(Optional)

Timeout of server connection.

opcda-read

Server

OPC DA server which is wanted to connect.

Group Name(Optional)

Node name to be shown in node-red.

Cache Read (Optinal)

Check if wanted to read tags from cache.

Data Change (Optional)

Check if wanted to output msg.payload when value of tag changes.

OPC DA Tags

Add OPC DA tags wanted to read.

opcda-write

Server

OPC DA server which is wanted to connect.

Name (Optional)

Node name to be shown in node-red.

Usage

set msg.payload parameter with the following;

[
    {"itemID":"<ItemID want to set>","type":"<type of the value>","value": <value want to set>},
            .
            .
            .
]

Accepted Data Types

• double
• short
• integer
• float
• byte
• long
• boolean
• uuid
• string
• char
• date
• currency
• array

Screenshots

opcda-server

opcda-read

opcda-write