PROGRAMMABLE LOGIC CONTROL.(LL)>CUSTOM<
5th Edition
ISBN: 9781266481475
Author: Petruzella
Publisher: MCG
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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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Execute the following instruction using all previous instruction format types
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
The program counter (PC) contains the address of the next instruction -pair to be fetched from memory?
a. True
O b. false
Chapter 5 Solutions
PROGRAMMABLE LOGIC CONTROL.(LL)>CUSTOM<
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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