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WorksheetsCH 15: Sequencer Instructions
Total questions: 20
Worksheet time: 30mins
Which of the following is a possible state change for output devices connected to output ports?
On to off state
Off to standby state
On to standby state
Off to sleep state
What do certain PLC manufacturers use instead of the sequencer instruction?
Table-to-register instructions
File-to-word instructions
Both A and B
None of the above
What is used to reset the instruction in the Sequencer Output Instruction (SQO)?
Done bit of index register or control register
Power switch
Temperature sensor
Network cable
What is the designation for bit data file three?
B3
B10
N7
B7
What is the radix used in the data file B3 shown in the diagram?
Decimal
Hexadecimal
Octal
Binary
What does "M2" stand for in the sequencer output pattern?
Mode 2
Motor 2
Module 2
Memory 2
What is the purpose of the "POS" in the Control Register (R6)?
Step position
Position of memory
Position of data
Position of instruction
What is the purpose of a sequencer output (SQO) in a PLC ladder logic diagram?
To control the sequence of operations
To measure temperature
To calculate speed
To display data
What is the control address for the sequencer output (SQO) in the diagram?
R6:0
R5:0
R4:0
R3:0
What is the length of the sequencer output (SQO) in the diagram?
4
5
6
7
In the diagram, what does the input I:1 represent?
An input device
An output device
A timer
A sequencer
What is the purpose of a ladder logic diagram in PLC programming?
To visually represent control logic
To calculate mathematical equations
To store data
To display graphics
To what does the SQC instruction compare input data?
To a control data file (R6).
To a step pattern in a bit data file (B3 or B10) or integer data file (N7).
To a sequence of random numbers.
To a user-defined text file.
When is the Found bit (FD) enabled in the SQC instruction?
When the input data is deleted.
When the input data matches one of the patterns in the data file.
When the input data is encrypted.
When the input data is written to an output module.
What does the acronym PLC stand for in the context of automation?
Programmable Logic Controller
Personal Laptop Computer
Public Limited Company
Power Line Communication
In the provided ladder logic diagram, what is the time base for the Timer T4:0?
0.1
0.01
1.0
10.0
What is the preset value for the Timer T4:0 in the diagram?
100
200
300
400
What is the output labeled as in the ladder logic diagram?
Green_PLT
Red_PLT
Blue_PLT
Yellow_PLT
How many columns are displayed in the data file?
8
10
12
16
Which PLCs do not support the Sequencer Load (SQL) instruction?
Allen-Bradley SLC 5/02
Allen-Bradley fixed SLC 500 PLCs
MicroLogix PLCs
Allen-Bradley SLC 5/05
