11 LAB FBD

AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

INTERPRETING FUNCTION BLOCK
DIAGRAM

Summary Tasks
After completing this lesson you will able to:
 Interpret the Data Flow of Function Block
 Create BIT Instruction with Function Block
 Create Timer and Counter with Function Block
 Solve the basic problem (Exercise)

Section 1: FBD Data Flow

Lab Works Function Block Diagram

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1.1 Each Output tag must use only one Output Reference
1.1.A Create Routine

1.1.B Create Tag

Lab Works Function Block Diagram

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AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

Add These 8 more Tags:
No

Name

Data Type

Style

1

Switch_1

BOOL

Binary

2

Switch_2

BOOL

Binary

3

Switch_3

BOOL

Binary

4

Result_Switch_1

BOOL

Binary

5

Result_Switch_2

BOOL

Binary

6

Analog_Value_1

DINT

Decimal

7

Analog_Value_2

DINT

Decimal

8

Analog_Value_3

DINT

Decimal

1.1.C Create Jump To Subroutine in MainRoutine

Lab Works Function Block Diagram

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1.1.D Create Instruction example 1
Drag and drop from Instruction Bar

and Create This:
OSRI_01
OSRI

...

One Shot Rising with Input
2#0000_0000
Switch_0

0
InputBit

OutputBit

Result_Switch_1

Instruction example 1

1.1.E Verify Controller

And show error window

IF error is not occur, it means that BFD is correct:

1.1.F Create Instruction example 2 and Verify Controller

Lab Works Function Block Diagram

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ADD_01
ADD

...

Add
0

0.0

Analog_Value_1

SourceA

Dest

Analog_Value_3

SourceB
0
Analog_Value_2
EQU_01
EQU

...

Equal
0

0

Analog_Value_1

SourceA

Dest

Switch_0

SourceB
10
10

Instruction example 2

The Error Window should be:

1.1.G Create Instruction example 3 and verify controller
ADD_01
ADD

...

Add
0
Analog_Value_1

0.0
SourceA

Dest

Analog_Value_3

SourceB
0
Analog_Value_2
SEL_02
SEL

...

Select
0
Analog_Value_1

0.0
In1

Out

Analog_Value_3

In2
0
Analog_Value_2

SelectorIn
2#0000_0000

Switch_0

Instruction example 3
The error window will show

Lab Works Function Block Diagram

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This is because the FBD not allow the instruction to have two or more Output
reference with same Tag.

The FBD Data flows from output block to the next wired input
block.
1.2 Latching Data
1.2.A Create Instruction example 4 and verify controller

Instruction example 4
1.2.B Download to the controller

Before Download to the controller, make sure that the controller path and controller
slot (in the controller properties) is true.
Lab Works Function Block Diagram

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AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

1.2.C Run Controller

Watch that the Analog_Value_1, both in input reference and in output
reference have the same value.

The FBD Latch the data until next scan execute.

1.3 Assume Data Available
1.3.A Create Instruction example 5 and verify controller
ADD_01
ADD

...

Add
1

0.0

1

SourceA

Dest

Analog_Value_1

SourceB
0
Analog_Value_1
ADD_02
ADD

...

Add
1
1

0.0
SourceA

Dest

Analog_Value_2

SourceB

Instruction example 5

1.3.B Download to the controller and then run processor

Lab Works Function Block Diagram

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AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

Two instructions give the same mean. The assume data available uses an
output that the block produced on the previous scan. Or in other word we can
create delay with this.

1.3.C Create Instruction example 6 and verify controller
ADD_01
ADD

MUL_01
MUL

...

Add

Multiply

1
1

...

0.0
SourceA

0.0

Dest

SourceA

SourceB

Dest

Analog_Value_2

SourceB

1
1

1.3.D Download to controller and then run

The Assume data available use above is to produce a one scan delay
between blocks.
Lab Works Function Block Diagram

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AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

The assume data available can create delay between block
1.2 Exercise 1, BIT Instruction
1.2.A Create Tag
Create this tag
No

Tag

Alias

Data Type

Style

1

Light_0

Local:3:O.Data.0(C) BOOL

Binary

1

Light_1

Local:3:O.Data.1(C) BOOL

Binary

1

Light_2

Local:3:O.Data.2(C) BOOL

Binary

1

Light_3

Local:3:O.Data.3(C) BOOL

Binary

1.2.B Create Exercise BIT Instruction, and verify controller
2#0000_0000
Switch_0

Light_0

2#0000_0000
Light_0

Light_1
BNOT_02
BNOT

...

Boolean Not
2#0000_0000
Switch_1

1
In

Out

Light_2

OSRI_04
OSRI

...
RESD_02

One Shot Rising with Input
2#0000_0000
Switch_2

0
InputBit

RESD

...

OutputBit
Reset Dominant

0
Set

Out

OSRI_06
OSRI

Light_3
1

Reset

OutNot

...

One Shot Rising with Input
2#0000_0000
Switch_3

0
InputBit

OutputBit

When Create Instruction, make sure the tag you use is the same like the tag
you create.
1.2.C Download to the controller and then run processor
1.2.D Monitor the value
Monitor from the sheet:

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2#0000_0000
Switch_0

Light_0

2#0000_0000
Light_0

Light_1
BNOT_02
BNOT

...

Boolean Not
2#0000_0000
Switch_1

1
In

Out

Light_2

OSRI_04
OSRI

...
RESD_02

One Shot Rising with Input
2#0000_0000
Switch_2

0
InputBit

RESD

...

OutputBit
Reset Dominant

0
Set

Out

OSRI_06
OSRI

Light_3

1

Reset

OutNot

...

One Shot Rising with Input
2#0000_0000
Switch_3

0
InputBit

OutputBit

From Program Tag Display:

1.2.E Toggle the switch

Lab Works Function Block Diagram

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1.2.E Answer following question:
A. Close Switch_0 (By toggle the Tag), When Switch_0 is Close (Bit = 1), which

Tag/Light(s) is turn on?

B. Open Switch_0. When Switch_0 is Open what happen to Light_0 and
Light_1?
C. Close Switch_1. What happens to the Light_2?

D. Open Switch_1. What happens?
E. Close Switch_2. What happens?

F. Open Switch_2. What happens?

G. What must you do to turn the Light_3 off?

H. What happens if we close Switch_2 and Switch_3 (Correspond to Light_3)?

Lab Works Function Block Diagram

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AB CONTROLLOGIX – SYSTEM OPERATION AND PROGRAMMING COURSE

1.3 Exercise 2, Timer/Counter Instruction
1.3.A Open Routine: FBD_OPEN_PROJECT_1
TONR_05
TONR
1

...
CTUD_01

Timer On Delay with Reset

1

T imerEnable

CTUD

0

Count Up/Down

...

ACC

2000
2000

0
PRE

DN

0
Reset

CUEnable

ACC

CDEnable

DN

0
PRE
3
3

Reset

EQU_01
EQU

...

Equal
0
SourceA

Dest

Light_0

0
0

SourceB

EQU_02
EQU

...

Equal
0
SourceA

Dest

Light_1

1
1

SourceB
EQU_03
EQU

...

Equal
0
SourceA

Dest

Light_2

2
2

SourceB

1.3.B Download to the processor, and then run controller
1.3.C Answer following question:
A. Which Block Instruction generates a pulse output?

B. What is the pulse wave function?

C. Describe what is the purpose of that process?

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