EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
5th Edition
ISBN: 8220102803503
Author: Petruzella
Publisher: YUZU
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Textbook Question
Chapter 5, Problem 13RQ
Answer the following with regard to the Examine If Open instruction:
- a. What is another common name for this instruction?
- b. What is this instruction asking the processor to examine?
- c. Under what condition is the status bit associated with this instruction 0?
- d. Under what condition is the status bit associated with this instruction 1?
- e. Under what condition is this instruction logically true?
- f. What state does this instruction assume when it is false?
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7. For both of the instructions shown below, the initial conditions are shown. The result
(which the instruction stores in r1) is also shown. For each instruction, answer these
questions:
• What is the state of the flags (NZCV) after the instruction executes
•
If the operands were signed, are the results valid? Why or why not?
• If the operands were unsigned, are the results valid? Why or why not?
a) initial conditions: r0 = 0xAAAA_AAAA
rl=0x5555_5555
ADDS rl,rl,ro
Result: r1=0xFFFF_FFFF
b) initial conditions: r0=0x7FFF_FFFD
r1 = 0x0000_000F
ADDS rl,ro,r1
Result: r1=0x8000_000C
In an instruction cycle the execute phase includes
Select one:
a.the operation of the decoded instruction on all the operands.
b.there is no correct answer here
c.incrementing the program counter by 2 addresses.
d.the step of decoding the instruction for execution.
e.the transfer of the content of memory address pointed by the program counter.
Answer the following for the "cbw" instruction.
The purpose is to convert
choose your answer...
and the instruction is used in
choose your answer...
operation
Chapter 5 Solutions
EBK LOGIXPRO PLC LAB MANUAL FOR PROGRAM
Ch. 5 - What does the memory map for a typical PLC...Ch. 5 - Compare the function of the PLC program and data...Ch. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - a. What information is stored in the input image...Ch. 5 - a. What information is stored in the output image...Ch. 5 - Prob. 7RQCh. 5 - List four factors that enter into the length of...Ch. 5 - Prob. 9RQCh. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Answer the following with regard to the Examine If...Ch. 5 - Answer the following with regard to the Examine If...Ch. 5 - Answer the following with regard to the Output...Ch. 5 - A normally closed pushbutton is connected to a PLC...Ch. 5 - Prob. 16RQCh. 5 - Prob. 17RQCh. 5 - Prob. 18RQCh. 5 - Prob. 19RQCh. 5 - Prob. 20RQCh. 5 - Prob. 21RQCh. 5 - Explain the purpose of Windows based programming...Ch. 5 - Prob. 23RQCh. 5 - Prob. 24RQCh. 5 - Prob. 25RQCh. 5 - Prob. 26RQCh. 5 - Assign each of the following discrete input and...Ch. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Redraw the program shown in Figure 5-57 corrected...Ch. 5 - Redraw the program shown in Figure 5-58 corrected...Ch. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8PCh. 5 - Write the ladder logic program needed to implement...
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Similar questions
- I need the answer as soon as possiblearrow_forwardFill in the following table showing the results of the indicated instructions, using the register values shown. Also, show the OF and CF values AFTER the instruction executes. Show all results in hexadecimal. Show OF and CF as 0 or 1.arrow_forward6. What is the result of executing the following instruction MOV AL,05H AND AL, 03H OR AL,01H NOT AL Oa. AL= 0000 0001 b. AL= 0000 0010 c. AL= 11111110arrow_forward
- Question 9 You are giving the before condition and an instruction. Give the after condition: Before: Ecx: 9A BC 90 67 instruction: xor cx, 1010b After condition of ECX: O 00 00 00 90 O 9A BC 90 6D O 9A 00 80 77 O 9A BC 6F 9Aarrow_forwardcarrow_forwardIn the case of a failure, what may possible induce a return to the previously performed instruction?arrow_forward
- What may possibly cause a resumption of the previously completed instruction in the event of a failure?arrow_forwardThe instruction, Add #45,R1 does A. Adds 45 to the value of Rl and stores it in R1 Adds the value of 45 to the address of R1 and stores 45 in that address C. None of the mentioned D. Finds the memory location 45 and adds that content to that of R1 B.arrow_forwardwhat is the instruction format of the operation below and how the CPU fetch this operands from memory? Explain that. A = X-Y/Z *arrow_forward
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