OPC DA data source properties
- Last UpdatedSep 06, 2023
- 1 minute read
Refer to the following tables for the key configurable properties of OPC DA data source.
ConfirmWrites properties
|
Property |
Description |
Valid values |
|---|---|---|
|
BlockDelay |
The interval at which blocks of tags are written to the OPC-DA data source. |
[hh:mm:ss] |
|
BlockSize |
The number of tags that are written in a block to the OPC-DA data source. This property must be set to a minimum of 1. |
Integer. |
|
ConfirmDelay |
The period of time to wait to confirm tags after they are written to the OPC-DA data source. |
[hh:mm:ss] |
|
ConfirmTimeout |
The maximum period of time to wait to confirm tags. This property has a minimum value of 500 milliseconds. |
[hh:mm:ss] |
|
PollRate |
The interval at which data is requested by the OPC-DA data source to refresh cached values. This property has a minimum value of 100 milliseconds. |
[hh:mm:ss] |
Connection properties
|
Property |
Description |
Valid values |
|---|---|---|
|
ActiveConnection |
This is a system field. Do not use. It displays the currently active connection. |
[Opc Connection item name] |
|
ConnectionState |
The current state of the connection to the OPC server. |
Open, Closed |