Turn off a device at the end of a step, Turn off a device at the, End of a step – Rockwell Automation Logix5000 Controllers Sequential Function Charts Programming Manual User Manual
Page 35
Design a sequential function chart Chapter 1
Description
Step becomes inactive.
X bit turns off.
Timer retains its value.
AlarmHigh stays on. (You have to manually turn it off.)
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.
Turn off a device at the end
of a step
Rockwell Automation Publication 1756-PM006F-EN-P - October 2014
35