Transition firing states
The firing attribute is a subset of the FIRING state and gives a visual indication of the current state.
This firing attribute is visible when the transition expression has evaluated TRUE. The firing process requires several interactions with different phases and is an asynchronous process. Some phases may have programs that can take a long time to finish running (stopping a motor for example), so the firing object shows what the transition is doing. The displayed Firing Attribute values are: COMMITTED, STOPPING, RESETTING, PENDING, and PAUSED.
Firing Attribute | Description |
ACQUIRING | The Equipment Sequence is acquiring the right to command the Equipment Phase . For every step that follows the transition, the Equipment Sequence must attach to each associated Equipment Phase before the steps can be activated. |
COMMITTED | The transition is committed to firing because the transition expression has evaluated TRUE, but the transition cannot activate the following steps because it is in Manual mode or the Equipment Sequence is in the PAUSED substate. |
STOPPING | As part of firing, the Equipment Sequence commands all the active preceding steps to stop. The transition firing state is STOPPING until all commanded steps are STOPPED. |
RESETTING | As part of firing, the Equipment Sequence commands all the preceding steps that are STOPPED to RESET. The transition firing state is RESETTING until all the commanded steps are IDLE. |
PENDING | The transition is not able to fire because the Equipment Phase s of the steps above or below the transition are not in the correct state to permit the transfer of control function. |
PAUSED | The transition is committed to fire, but cannot because the Equipment Sequence has been PAUSED. The transition is waiting for a RESUME command. |
POST SCANNING | The transition is at the end of the firing process. On the next scan of the Equipment Sequence chart, the transition advances the chart. |
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