Rockwell-automation Logix5000 Controllers Sequential Function Charts P Manuel d'utilisateur Page 62

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Chapter 2 Program a sequential function chart
Location to which the wire goes
Assign the preset time for a step
1. Click the button of the step.
2. In the Step Properties dialog box, on the General tab, in the Preset box,
enter the time for the step, in milliseconds.
3. Click OK.
When the step is active for the preset time (Timer = Preset), the DN bit of the
step turns on.
To calculate the preset time for a step at runtime, see
Use an expression to
calculate a time on page 63.
Configure alarms for a step
Follow these steps to turn on an alarm if a step executes too long or not long
enough.
1. Click the button of the step.
2. In the Step Properties dialog box, on the General tab, select the Alarm
Enable check box.
3. Enter the time for the high alarm (Limit High) and low alarm (Limit
Low), in milliseconds.
4. Click OK.
Configure a step
62 Rockwell Automation Publication 1756-PM006F-EN-P - October 2014
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