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State machine (FSM) templates

PackML unit machine — ISA-TR88.00.02 state model

The full seventeen-state PackML/OMAC unit machine — Stopped, Resetting, Idle, Starting, Execute, Holding, Held, Unholding, Suspending, Suspended, Unsuspending, Completing, Complete, Stopping, Aborting, Aborted, Clearing — with every SC transition and every Stop, Hold, Suspend, Reset, Clear and Abort command arrow, for the controls engineer writing or accepting PackML machine state code at FAT.

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Template previewState machine (FSM)
PackML unit machine — ISA-TR88.00.02 / OMAC PackML17 states · 46 transitions · 10 eventsClearSCResetSCStartSCSCSCResetHoldSCUnholdSCSuspendSCUnsuspendSCSCStopStopStopStopStopStopStopStopStopStopStopStopSCAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortAbortedClearingStoppedResettingIdleStartingExecuteHoldingHeldUnholdingSuspendingSuspendedUnsuspendingCompletingCompleteStoppingAbortingAll 17 states are reachable and every transition names states that exist.INFONo state is marked `final`, so this machine never terminates. That is ordinary for a reactive controller and a smell for a workflow.OKAll 17 states are reachable from `Aborted`.OKAll 46 transitions name states that exist, so every arrow in the figure is drawn.

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title "PackML unit machine — ISA-TR88.00.02 / OMAC PackML"

state Aborted
state Clearing
state Stopped
state Resetting
state Idle
state Starting
state Execute
state Holding
state Held
state Unholding
state Suspending
state Suspended
state Unsuspending
state Completing
state Complete
state Stopping
state Aborting

initial Aborted

transition Aborted       -> Clearing      on "Clear"
transition Clearing      -> Stopped       on "SC"
transition Stopped       -> Resetting     on "Reset"
transition Resetting     -> Idle          on "SC"
transition Idle          -> Starting      on "Start"
transition Starting      -> Execute       on "SC"
transition Execute       -> Completing    on "SC"
transition Completing    -> Complete      on "SC"
transition Complete      -> Resetting     on "Reset"

transition Execute       -> Holding       on "Hold"
transition Holding       -> Held          on "SC"
transition Held          -> Unholding     on "Unhold"
transition Unholding     -> Execute       on "SC"

transition Execute       -> Suspending    on "Suspend"
transition Suspending    -> Suspended     on "SC"
transition Suspended     -> Unsuspending  on "Unsuspend"
transition Unsuspending  -> Execute       on "SC"

transition Stopping      -> Stopped       on "SC"
transition Resetting     -> Stopping      on "Stop"
transition Idle          -> Stopping      on "Stop"
transition Starting      -> Stopping      on "Stop"
transition Execute       -> Stopping      on "Stop"
transition Holding       -> Stopping      on "Stop"
transition Held          -> Stopping      on "Stop"
transition Unholding     -> Stopping      on "Stop"
transition Suspending    -> Stopping      on "Stop"
transition Suspended     -> Stopping      on "Stop"
transition Unsuspending  -> Stopping      on "Stop"
transition Completing    -> Stopping      on "Stop"
transition Complete      -> Stopping      on "Stop"

transition Aborting      -> Aborted       on "SC"
transition Clearing      -> Aborting      on "Abort"
transition Stopped       -> Aborting      on "Abort"
transition Resetting     -> Aborting      on "Abort"
transition Idle          -> Aborting      on "Abort"
transition Starting      -> Aborting      on "Abort"
transition Execute       -> Aborting      on "Abort"
transition Holding       -> Aborting      on "Abort"
transition Held          -> Aborting      on "Abort"
transition Unholding     -> Aborting      on "Abort"
transition Suspending    -> Aborting      on "Abort"
transition Suspended     -> Aborting      on "Abort"
transition Unsuspending  -> Aborting      on "Abort"
transition Completing    -> Aborting      on "Abort"
transition Complete      -> Aborting      on "Abort"
transition Stopping      -> Aborting      on "Abort"