Many measurement applications generate pulses to represent a flow rate. For example:
Many PLC Devices provide pulse counter inputs that count the pulses in a register. The register value increases until it reaches a maximum value. When the maximum value is reached, the register usually resets back to zero. The reset back to zero is often called "rollover".
The Time Series Counter Tag 
converts a raw counter value to a time series (values at an equal spaced time interval) representing the flow rate.
The tag provides a scale factor to convert pulses to the units of the monitored resource.
The tag handles counter rollover.
The Time Series Counter Tag supports the configuration properties of the Time Series Core Tag plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| DisplayFormat | WSTRING | 3.73 |
The format used to display the tag's value. This property defines how the value of the tag appears in:
|
| SourceTagRollover | ULINT | 3.46 | The maximum value of the raw counter. It is important to configure this property with the correct value. If this property is not configured correctly, the time series will not generate correct results at counter rollover. |
| ScaleFactor | LREAL | 3.46 | The scale factor to apply to the raw count value to get the time series value. |
| Units | WSTRING | 3.46 | The units of the measured value. |
The Time Series Counter Tag supports the dynamic properties of the Time Series Core Tag plus these properties.
| Property | Type | Description |
|---|---|---|
| SourceTagValue | ULINT | The current value of the data source tag. |
| LatestCompleteSampleRawValue | ULINT | The raw count value of the most recent complete time sample. |
| LatestCompleteSampleValue | LREAL | The value of the most recent complete time sample. |
| LatestCompleteSampleQuality | TIME | The quality of the most recent complete time sample. |
| LatestCompleteSampleTimestamp | TIME | The date and time of the most recent complete time sample. |
| CurrentSampleSize | UDINT | The number of raw data samples used so far to build the current sample. |
| CurrentSampleRawValue | ULINT | The raw count value of the current sample. |
| CurrentSampleValue | LREAL | The value of the current sample. |
| CurrentSampleQuality | UINT | The quality of the current sample. |
The Time Series Counter Tag does not support any tag commands.
The Time Series Counter Tag builds on the features of these tag types:
To learn about data sources for Time Series Tags.
To learn about other Time Series Tags.
For the meaning of terms used in Fernhill SCADA.