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OPC UA input settings

This document aims to describe each setting that is available to the different type of OPC inputs.

OPC input common settings

CurrentValue

Last read value.

Enabled

If the input should be used or not.

Errormessage

Current error message.

InputMode

How the input is read - “OPC input modes”.

LastChecked

Last time it was read from OPC.

LastStatusChange

Last time the Quality status was change.

LastUpdated

Last the value changed when it was read.

OPCAdress

The OPC input address.

OPCServer

Which OPC server the input is connected to.

Quality

The current OPC quality status codes for the input.

Refreshrate

How often the input should be read in milliseconds.

OPC input modes

Normal

Read

Reads the input periodically according to the Refreshrate.

Subscription

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

FilterActive

Declared is the filter settings should be used

FilterAmount

FilterPeriod

MaxValue

Set the max value where counter starts over again.

OPC Status input

TrueValue

Which string-value that indicates when the input is True.

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