The PLC Device Tag with RTC represents a PLC with a Real Time Clock.
The PLC Device Tag with RTC supports the configuration properties of the PLC Scanned Device Tag, plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| SetClockEnable | BOOL | 2.4 | Whether Fernhill SCADA will attempt to set the real time clock of the PLC Device. |
| SetClockInterval | TIME | 2.4 | The interval between each attempt to automatically set the PLC clock. See Interval and Offset for information on how Intervals and Offsets define the time of activities. |
| SetClockOffset | TIME | 2.4 | The offset added to the SetClockInterval to get the actual set clock time. See Interval and Offset for information on how Intervals and Offsets define the time of activities. |
| SetClockTimeZone | USINT | 2.4 | The time zone of the date and time sent to the PLC. 0 = UTC, 1 = Local Time. |
The PLC Device Tag with RTC supports the data properties of the PLC Scanned Device Tag, plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| SetClockTimer | TimerStatus | 2.4 |
The status of the set clock timer. This includes:
|
| SetClockStatus | USINT | 2.4 | The status of the last set clock operation |
The SetClockStatus property can have these values:
| State | Description |
|---|---|
| 0 | Initial state before the driver starts |
| 1 | The PLC is offline |
| 2 | Set clock operations are disabled (SetClockEnable is False) |
| 3 | The last set clock operation failed |
| 15 | The PLC real time clock is synchronized |
A tag command is an action you can trigger on a tag.
The PLC Device Tag with RTC supports the tag commands of the PLC Scanned Device Tag plus these commands:
| Tag Command | Version | Description |
|---|---|---|
| SetClock | 2.4 | Sends a set clock request to the PLC. |
The PLC Device Tag with RTC builds on the features of these tag types:
The PLC Device Tag with RTC is used as a building block for these tag types:
To learn about PLC Scanned Device Tags.
PLC Device TagTo learn about PLC Device Tags.
To learn about abnormal conditions in SCADA applications.
For the meaning of terms used in Fernhill SCADA.