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Interval System Clocks Relay Flags

Interval System Clock Relay Flags (F009)​

The interval system clock flags, F009, toggle ON/OFF at constant time intervals while the PLC is in RUN mode.
These flags are used for time-based operations, such as periodic event triggering, monitoring, and automation tasks.

Interval System Clock Relay Flags
Flag BitNameDescriptionUse Case
F009.00.02sThis flag toggles ON (1) and OFF (0) every 0.02 seconds Used for high-frequency timing operations
F009.10.1sThis flag toggles ON (1) and OFF (0) every 0.1 secondsIdeal for short-interval process monitoring
F009.20.2sThis flag toggles ON (1) and OFF (0) every 0.2 secondsSuitable for mid-range timing applications
F009.31sThis flag toggles ON (1) and OFF (0) every 1 secondCommonly used for second-based operations
F009.42sThis flag toggles ON (1) and OFF (0) every 2 secondsUsed for slower timing or periodic processes
F009.510sThis flag toggles ON (1) and OFF (0) every 10 secondsIdeal for low-frequency repetitive tasks
F009.620sThis flag toggles ON (1) and OFF (0) every 20 secondsSuitable for monitoring or logging intervals
F009.71mThis flag toggles ON (1) and OFF (0) every 1 minuteUsed for long-term periodic operations

F009.0 - 0.02s​

Description​

The 0.02s internal system clock flag is ON (1) and OFF (0) every 0.02 seconds during RUN mode.

Use Case​

  • Suitable for high-frequency timing operations.
  • Used for tasks requiring precise time intervals, such as fast data sampling.

F9.0 OFF​

F9.0 ON​

F009.1 - 0.1s​

Description​

The 0.1s internal system clock flag is ON (1) and OFF (0) every 0.1 seconds during RUN mode.

Use Case​

  • Used for short-duration event monitoring.
  • Ideal for process control tasks with quick response times.

F9.1 OFF​

F9.1 ON​

F009.2 - 0.2s​

Description​

The 0.2s internal system clock flag is ON (1) and OFF (0) every 0.2 seconds during RUN mode.

Use Case​

  • Useful for medium-duration timing needs.
  • Can be applied to repetitive mid-range tasks.

F9.2 OFF​

F9.2 ON​

F009.3 - 1s​

Description​

The 1s internal system clock flag is ON (1) and OFF (0) every 1 second during RUN mode.

Use Case​

  • Commonly used for time-sensitive periodic operations.
  • Suitable for creating a basic 1-second timer.

F9.3 OFF​

F9.3 ON​

F009.4 - 2s​

Description​

The 2s internal system clock flag is ON (1) and OFF (0) every 2 seconds during RUN mode.

Use Case​

  • Used for slower periodic events.
  • Ideal for tasks that require actions every 2 seconds.

F9.4 OFF​

F9.4 ON​

F009.5 - 10s​

Description​

The 10s internal system clock flag is ON (1) and OFF (0) every 10 seconds during RUN mode.

Use Case​

  • Suitable for low-frequency repetitive tasks.
  • Can be used for logging or monitoring operations at 10-second intervals.

F9.5 OFF​

F9.5 ON​

F009.6 - 20s​

Description​

The 20s internal system clock flag is ON (1) and OFF (0) every 20 seconds during RUN mode.

Use Case​

  • Ideal for longer periodic tasks.
  • Suitable for slower processes or system checks.

F9.6 OFF​

F9.6 ON​

F009.7 - 1m​

Description​

The 1m internal system clock flag is ON (1) and OFF (0) every 1 minute during RUN mode.

Use Case​

  • Ideal for long-duration periodic operations.
  • Commonly used for monitoring and logging tasks or as a clock signal for minute-based processes.

F9.7 OFF​

F9.7 ON​