What is the Sequencer Object? - Platforma Internetowa ASTOR

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18 Chapter 1 About the Sequencer Object Step Condition and Jump Condition Every step body contains a: • Step Condition - if the step condition is fulfilled, Sequencer continues processing at the next step • Jump Condition - if the jump condition is fulfilled, Sequencer continues processing at a specified step (which can also be the current step). Note If both the step condition and the jump condition are true, advancing to the next step takes precedence over the jump. The following diagram shows this: By default: • Jump Write OnExit is False, which means On Exit output values are not written for a jump transition. • Step Write OnExit is True, which means On Exit output values are written for a step transition. You can change this setting for any given step in your program. A single step with a jump condition is processed as follows: Sequencer Object User’s Guide
Step Structure 19 1 The step becomes active. On Entry values are written to Outputs. 2 Sequencer cycles continuously at the step body, evaluating the step condition and the jump condition at every scan cycle. 3 When the step condition is met, the On Exit output values are written if the Step Write OnExit is True, and the Sequencer advances to the next step. 4 When the jump condition is met, the On Exit output values are written if Jump Write OnExit is True, and the Sequencer moves the active step to the specified step. Tip Jumps can be forward, backward, or to the current step. If the current step is the target of the jump, the on entry outputs are written once just like at any other step destination. You can use Jump transitions for: • Conditional Program Flow • Error Handling • Monitoring Triggers In the step program, triggers cause the step or jump condition of the active step to be met and the step program processing to continue. Triggers are linked to Aliases that reference ArchestrA attributes. Note Triggers are usually linked to Boolean attributes, but can also use any other numeric data type (integer, float, double). The trigger value is coerced to True or False. In the simplest While True case, when a Trigger (Boolean attribute) is true, the condition the Condition evaluates to true, the On Exit Output are written and the step is ready to transition the next scan. The Aliases panel maps attributes to Aliases. The Aliases are mapped to steps via values to be written at that step. Step and Jump Conditions are triggered by referenced Boolean attributes in different ways, such as when the Boolean attribute: • is true: While True • becomes true while the step is active: On True • is false: While False • becomes false while the step is active: On False Sequencer Object User’s Guide
Page 1 and 2: ArchestrA Sequencer Object User’s
Page 3 and 4: 3 Contents Welcome.................
Page 5 and 6: Contents 5 Assigning the Value of
Page 7 and 8: Contents 7 Advancing a Step.......
Page 9 and 10: 9 Welcome This guide assumes you kn
Page 11 and 12: 11 Chapter 1 About the Sequencer Ob
Page 13 and 14: Sequencer Object Structure 13 The
Page 15 and 16: Sequencer Object Structure 15 In t
Page 17: Step Structure 17 Step Entry, Step
Page 21 and 22: Steps and Aliases Naming Convention
Page 23 and 24: 23 Chapter 2 Defining Steps This se
Page 25 and 26: Configuring Steps 25 Write On Exit
Page 27 and 28: Configuring Steps 27 • Cyclic Ti
Page 29 and 30: Inserting Steps 29 2 Click the Add
Page 31 and 32: Defining Minimal Steps 31 3 Select
Page 33 and 34: Validating the Step Program 33 Val
Page 35 and 36: Locking the Step Program 35 2 Clic
Page 37 and 38: 37 Chapter 3 Defining Step and Jump
Page 39 and 40: Defining Steps with a Cyclic Timer
Page 41 and 42: Defining Steps with a Cyclic Timer
Page 43 and 44: Defining Steps with Always True or
Page 45 and 46: Defining Combinations of Triggers a
Page 53 and 54: 53 Chapter 4 Defining Outputs for a
Page 55 and 56: Assigning an Output Value to a Step
Page 61 and 62: Deleting Aliases 61 To rename an A
Page 63 and 64: 63 Chapter 5 Using Alias Definition
Page 65 and 66: Changing the Appearance Order of Al
Page 67 and 68: Viewing Alias References 67 • th
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69 Chapter 6 Defining Sequencer Pro
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Handling Errors and Reporting Alarm
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Handling Errors and Reporting Alarm
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Configuring Security 75 2 Select t
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Configuring Security 77 2 Select t
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Configuring Security 79 To change
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81 Chapter 7 Importing and Exportin
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Exporting the Program Settings 83
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Importing the Program Settings 85
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87 Chapter 8 Running the Sequencer
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Handling Restart/Failover Condition
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Handling Restart/Failover Condition
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93 Chapter 9 Using Sequencer Progra
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Controlling Program Flow at Run Tim
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111 Chapter 10 Modifying the Sequen
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Viewing and Changing the Configurat
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Changing Step Program and Alias Con
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Loading and Saving 117 3 Check the
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Uploading Run-Time Changes 119 Aft
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Detecting Errors at Run Time 121
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Using the Sequencer Object with Red
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125 Appendix A Sequencer Object Hel
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Configuration Object Attributes 12
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Run-Time Object Attributes 133 Exe
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Run-Time Object Attributes 135 Att
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Alarm Attributes 153 Attribute .Ac
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155 Appendix B Sequencer Program XM
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About Steps 157 Condition Type Con
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Example XML 159 specifies if pro
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161 Appendix C Sequencer State Tran
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Current Execution State: RunningSin
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Current Execution State: RunningHel
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Current Execution State: StoppedCom
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169 Appendix D Error Codes for Run-
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Glossary 171 Glossary Application
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Glossary 173 Check out Checkpoint
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Glossary 175 Galaxy Repository Hie
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Glossary 177 Package File (.aaPKG)
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Glossary 179 SmartSymbols System M
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181 Index A a numerical output valu
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Index 183 aliases 60, 64 steps 28
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What is the Sequencer Object? - Platforma Internetowa ASTOR

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