ABB COM600 series User Configuration Manual page 29

Substation management units 5.1 sequence control

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1MRS755001

Figure 4.8-1 Defining step 1 transition for a sequence

COM600 series 5.1

Sequence Control Configuration Manual

2. Name the new transition object as Step1_Transition and set Structured Text (ST)

as the implementation language from the drop-down menu

3. Select the added Step1_Transition object from the Devices view. In the corresponding

program editor, add the sequence Step1_Transition object definition, see Figure 4.8-

Depending on the number of steps intended for a sequence, add additional actions and

transition objects for the sequence POU as described in 4.7, Adding a new action object

and in this section, with the following exceptions:

•

When adding an action object, make sure that the program statement in the program

editor corresponds to the action step number. For example, for a Step2_Action

object, the program statement in the program editor should be:

SFCReset := SequenceStepExecute(SeqNorthZoneOpenVar, Switches[2], 2,

SWITCH_CONTROL.Open);

•

Similarly, when adding a transition object, make sure that the program statement in

the program editor corresponds to the transition step number. For example, for a

Step2_Transition object, the program statement in the program editor should be:

Step2_Transition := SequenceStepTransition(SeqNorthZoneVar, 2);

An example of the Device view for a four step sequence in the logic editor is shown in

Figure 4.8-2.

step1_transition.png

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