This document aims to describe each setting that is available to the different type of OPC inputs.
OPC input common settings
Last read value.
If the input should be used or not.
Current error message.
How the input is read - “OPC input modes”.
Last time it was read from OPC.
Last time the Quality status was change.
Last the value changed when it was read.
The OPC input address.
Which OPC server the input is connected to.
The current OPC quality status codes for the input.
How often the input should be read in milliseconds.
OPC input modes
Reads the input periodically according to the Refreshrate.
In OPC, a subscription refers to a mechanism that allows a client application to "subscribe" to receive updates from one or more OPC server items. This means that the client can request to receive notifications or updates when the value of a specific item changes on the OPC server. The client can also specify the rate at which it wants to receive updates, the rate is set by the Refreshrate property.
Specific settings for each type of OPC Inputs
OPC Counter input
Declared is the filter settings should be used
Set the max value where counter starts over again.
OPC Status input
Which string-value that indicates when the input is True.