Rockwell-automation Logix5000 Controllers Sequential Function Charts P Manuale Utente Scaricare il pdf (Pagina 80)

Chapter 3 Force steps

Important: The ForceStatus attribute shows only the status of I/O forces. It does not show the status of SFC

forces.

where:

Force_Status is a DINT tag.

To determine if Examine this bit For this value

forces are installed 0 1

no forces are installed 0 0

forces are enabled 1 1

forces are disabled 1 0

To override a false transition one time and go from an active step to the next step,

use the Step Through option.

• You do not have to add, enable, disable, or remove forces.

• The next time the SFC reaches the transition, it executes according to the

conditions of the transition.

This option also lets you override one time the false force of a simultaneous path.

When you step through the force, the SFC executes the steps of the path. Follow

these steps to step through the transition of an active step or a force of a

simultaneous path.

1. Open the SFC routine.

2. Right-click the transition or the path that is forced and then click Step

Through.

Step through a transition or

a force of a path

80 Rockwell Automation Publication 1756-PM006F-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers Sequential Function Charts P Manuale Utente Pagina 80