Design a sequential function chart
38 Rockwell Automation Publication 1756-PM006I-EN-P - February 2018
Example
Here is an example of the use of the Preset time of a step. The functional specification has these requirements.
1. Cook the ingredients in the tank for 20 seconds.
2. Empty the tank.
Example
Here is an example of the use of the high alarm of a step. The functional specification has these requirements.
1. Home 8 devices.
2. If all 8 devices are not home within 20 seconds, then shutdown the system.
When the SFC leaves a step, you have several options on how to turn off devices
that the step turned on.
Programmatic reset Automatic reset
Turn off a device at the end
of a step
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