This document aims to describe each setting that is available to the different type of OPC inputs.
OPC input common settings
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CurrentValue |
Last read value. |
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Enabled |
If the input should be used or not. |
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Errormessage |
Current error message. |
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InputMode |
How the input is read - “OPC input modes”. |
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LastChecked |
Last time it was read from OPC. |
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LastStatusChange |
Last time the Quality status was change. |
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LastUpdated |
Last the value changed when it was read. |
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OPCAdress |
The OPC input address. |
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OPCServer |
Which OPC server the input is connected to. |
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Quality |
The current OPC quality status codes for the input. |
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Refreshrate |
How often the input should be read in milliseconds. |
OPC input modes
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Normal |
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Read |
Reads the input periodically according to the Refreshrate. |
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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
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FilterActive |
Declared is the filter settings should be used |
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FilterAmount |
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FilterPeriod |
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MaxValue |
Set the max value where counter starts over again. |
OPC Status input
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TrueValue |
Which string-value that indicates when the input is True. |