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PSU PLC Exam 2
EET 475 Exam 2 Material PSU
| Question | Answer |
|---|---|
| What does AOI stand for | Add-On Instruction |
| What are Add On Instructions used f or? | To create new instructions for sets of commonly used logic. This provides a common interface to this logic, |
| What are some benefits of Add On Instructions | They allow: Reuse of Code Allow Easier to understand Interface " Can be Exported and Imported Can be Protected for Intellectual Property |
| The General Tab of an Add On Instruction Contains | The Name, the Description, the Program Type, the revision information and the vendor information |
| The Parameters Tab of an Add On Instruction contain | The Parameters define the instruction interface, how the instruction appears and interacts with the program when used. They contain the parameters needed when the Instruction is to be used. |
| The Local Tags Tab of an Add On Instruction... | Defines tags that are used within the logic of the Add On Instruction, they are NOT visible outside of the instruction |
| What are the three types of Programming Languages allowed for Add On Instructions | Ladder Diagram, Function Block Diagram, Structured Text |
| Can Add On Instructions be edited while online? | No, Add-On Instructions can only be edited offline |
| Can Add-On Instructions call other routines through a JSR instruction? | No they can not call other Routines, however Add-On Instructions can be Nested up to 16 levels. |
| In/Out Parameters are passed by _____________ while Input Parameters and Output Parameters are passed by _______________ | Reference, Value |
| To help be sure that specific data is passed into the Add-On Instruction you can use __________________ | Required Parameters |
| Making a parameter _______________ is useful if you do not usually need to pass the parameter value out to an argument, but you do want to see its value for troubleshooting | Visible |
| What is the SCL instruction | Scale Instruction |
| What are the SCL Instruction's input Parameters | EnableIn, In, InRawMax, InRawMin, InEUMax, InEUMin, Limiting |
| What are the possible Output Parameters of the SCL instruction | EnableOut, Out, (Not covered -)MaxAlarm, MinAlarm, Status, InstructFault, InRawRangeInv ) |
| What equation does the SCL function use to convert unscaled input to a scaled value ? | Out = ( In - InRawMin) *( ( InEUMax - InEUMin ) / ( InRawMax - InRawMin )) + InEUMin |
| If ( In > InRawMax ) Then MaxAlarm = __________ else Then MaxAlarm = ____________ | True, False |
| If (In < InRawMin ) Then MinAlarm = ___________ else Then MinAlarm = _____________ | True, False |
| Limiting is performed on Out when Limiting bit is set. The instruction sets Out = ____________ when In > InRawMax and sets Out = ____________ when In < InRawMin | InEUMax, InEUMin |
| The SCL instruction is typically used with | Analog input modules that do not support on board scaling to floating point engineering units |
| What does CPT stand for | Compute Instruction |
| What operators are allowed int the CPT instruction | + (add), - (subtract) , * (multiply) , / (divide), ABS (Absolute Value), ACS (arc cosine), AND (bitwise AND), ASN (arc sine), ATN (arc tangent), COS (cosine)... basically everything that is NOT an assignment or comparison |
| What does the CPT instruction do | When enabled, the CPT instruction evaluates the expression and places the result in the Dest. |
| What are the arguments in a CPT instruction | Dest, Expression |
| What does the ONS instruction stand for and what does it do | It is the One Shot instruction. The ONS instruction limits the execution of instructions to 1 scan. |
| What is a force? | Forces are used to override data that your logic either uses or produces |
| What are some things forces can be used for? | Testing and Debugging Logic Check Wiring to an Output Device Temporarily keep your process functioning when an input fails |
| What is something to remember if forces are enabled? | If forces are enabled and you install a force, the new force immediately takes effect |
| True or False : Removing a force on an alias tag also removes the force on the base tag | True |
| I/O forces can be used to override... | An input value from another controller ( a consumed tag ), An input value from an input device, logic and specify an output value for another controller ( a produced tag ), logic to specify state of an output device |
| You can force all I/O data except for | Configuration Data |
| True or False : You can force the individual bits of of a SINT, INT or DINT? | True |
| What is View Designer used for | To Build Projects that are downloaded to an HMI device |
| What are the common properties for all graphic elements? | Access, Angle, Enabled, Height, Opacity, Visible, WIdth, X, Y |
| What is the Numeric Display Graphic Element | A control with built in animation properties to show a numeric value. Use the Numeric Display to show numeric data from a bound tag on an HMI Device. To do this bind the value property to a numeric tag. |
| What is the Rounding Field used for in Numeric Display? | To specify how the numeric tag value appears when the amount of decimal places is greater than the DigitsAfterDecimal value. |
| What is the Numeric Input Graphic Display Element | The Numeric Input Graphic element is a control with built-in animation properties to show a tag value and open the virtual keypad to change the value. |
| What is the Slider Horizontal graphic element , (slider vertical is the same thing just rotated) | The Slider Horizontal Graphic Element is used to build an application with slider control |
| What are important properties of a Slider Element | Value, MinValue, MaxValue, WriteMode |
| What is the Text Display graphic element? | The Text Display graphic element is a control to show text or a string tag value. It is used to show messages and provide descriptive text. |
| What is the Text Input graphic element? | The Text Input graphic element is a control with built-in-animation properties to show a string tag value and open the virtual keyboard to change the value. This would be used for something such as user and password entry, |
| The ___________________ category of the Toolbox contains graphic elements such as push buttons. | ButtonsAndSwitches |
| What are some examples of graphic elements that can be found in the ButtonsAndSwitches category | Illuminated and Non-illuminated industrial push buttons of various sizes. Also contains pilot lights and legend plates. |
| How do you set up a button for screen navigation? | Go to button Properties, Add event and then button behavior. Choose the behavior to navigate to a user-defined screen. |
| Graphic elements can be made to act like buttons using... | Add Event and then Touch Release event |
| What are the 3 methods for configuring animations? | Binding Properties Using a ColorTable Using a StateTable |
| Describe the Binding Properties method for configuring animation... | This is mainly used for something such as Numeric Display or Text Display, directly binding its value with that of a tag's. (Though binding is also required to set up a colortable or statetable) |
| Describe the ColorTable method for configuring animations | Colortables are used for animations that include changing a graphic elements color, it is similar to a state table, but is only able to change colors. |
| Describe the StateTable method for configuring animations | Statetables change an objects state with expressions or tag binding similarly to a ColorTable, however unlike a color table they allow for more versatility such as movement of the object. This is what would be used to make something spin, ect... |
| What are the 4 Programming languages that can be used with Allen Bradly PLC's (not specific to an Add On Instruction) | Ladder Diagram, Sequential Function Chart, Function Block Diagram, Structured Text |
| What is the software used to configure drivers? | RSLinx Classic Software |
Created by:
francisman90
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