Message execution timing diagram (message is canceled)
The following table describes the message conditions and bit status for each execution step identified in the timing diagram when a message is canceled.
Step | Message Description | Bit status |
|---|---|---|
1 | Rung condition goes TRUE. Message execution is enabled. | EN bit is set. All other bits are cleared. |
2 | Message buffer is acquired. | EW bit is set. |
3 | Message execution get canceled. | ER bit is set. EW and ST bits do not change. |
4 | Rung condition goes FALSE. | EN bit is cleared. |
5 | Rung condition goes TRUE. | The Cancel input is cleared. The function block starts to execute. |
Timing diagram when the message is canceled
Timing diagram when the message is canceled
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