Monitor a step in the Sequence Detail Control

  • A monitored equipment sequence step shows several functions:
  • The user-configured step name and the
    Equipment Phase
     name.
  • The step execution state.
  • If the step is a source or target for a transfer of control.
  • If the step has a failure.
  • The step is executing.
  • If the step or associated phase is paused.
Item
Description
Failure
Phase failure - generated by the Equipment Phase Failure (PFL) instruction in the
Equipment Phase
 logic.
Internal failure - the sequencing engine has encountered a problem with the
Equipment Sequence
Step Name
The name of the step as configured during creation of the
Equipment Sequence
.
Pause status
The symbol shows that:
  • A pause of the phase logic is pending.
  • An auto-pause of the phase logic is pending.
  • The associated
    Equipment Phase
     is paused.
  • The associated
    Equipment Phase
     is paused and auto-pause is pending.
Equipment Phase Name
Each step is configured to reference on phase. The name of the phase is displayed so you know which equipment phase is executing.
Transfer of Control (TOC)
A step that has been configured as the source to transfer ownership to a following target step, without stopping the execution of the phase.
The symbol shows:
  • When the top bar is filled, this step is the beginning of a TOC step pair.
  • When the bottom bar is filled, this step is the end of a TOC step pair.
  • When both top and bottom bars are filled, this step is the end of a TOC step pair and the beginning of another TOC step pair.
When transfer of control is not configured, the symbols are not drawn.
Step State
When a step is active, and attached to its phase, the step state mirrors the state of the phase. The set of displayed states are: INACTIVE, NOT CONNECTED (active but not attached), IDLE, RESTARTING, RUNNING, RESETTING, HOLDING, STOPPING, ABORTING, HELD, STOPPED, ABORTED, and COMPLETE.
TIP: <No phase> steps have no associated phase and only have two displayed states: RUNNING and IDLE.
The step state is also represented by the color of the step.
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