what number is the program file that is scanned when the slc-500 is put into run mode
Added by Roy V.
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The question refers to an SLC-500, which is a type of programmable logic controller (PLC) manufactured by Allen-Bradley. When the PLC is put into run mode, it executes a program stored in its memory. Show more…
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Review Questions: 2. What processor type is used for the Allen-Bradley fixed SLC 500 PLC with twelve 120 VAC input ports and eight 120 VAC output ports? 4. Which file holds the main PLC ladder logic diagram? 5. What are the following PLC input instruction types: XIO and XIC? 7. Which data file holds the error messages? 8. Should you use the PLC force instruction in an industrial plant when assembly line workers are present? Why or why not? 9. List the seven commands available for creating and printing. 10. Describe how to open and save a project. Complete each of the following sentences with the correct word(s). 11. You must energize the coil to close an XIC Latch/Unlatch contact. 12. Bit addresses B3:0 through B3:255 or through may be used for latch/unlatch. 13. To latch or unlatch a contact, two are used. 14. The PLC system can be tested without actually closing or opening input devices in the mode. Specify whether the following statements are true or false. 15. You may use the PLC force instruction in a manufacturing plant when assembly line workers are present. 16. Two pushbuttons are typically used for each latch/unlatch instruction. 17. The Data File S2 dialog box displays the error messages. 18. In a PLC ladder logic diagram, you can place two or more output coils in series. 19. In a PLC ladder logic diagram, you can place two or more output coils in parallel. 20. In a PLC ladder logic diagram, you can place two or more contacts horizontally. 21. In a PLC ladder logic diagram, you can place two or more contacts vertically. 22. In a PLC ladder logic diagram, program execution flow must be from left to right.
Adi S.
A hypothetical machine has two I/O instructions: 0011 = Load A/C from I/O 0111 = Store A/C to I/O In these cases, a 12-bit address identifies a particular I/O device. Show the program execution with PC pointing to memory location 550 for the first instruction, for the following program: 1. Load AC from device 5 2. Add content of memory location 940 3. Store AC to device 6 Assume that the next value retrieved from device 5 is 3 and that location 940 contains a value of 2.
Akash M.
Text: Show Step By Step How a Machine Would Process This Hypothetical Machine Instruction Set 0001 - Load AC from Memory 0010 - Store AC to Memory 0011 - Load AC from I/O 0100 - Add to AC from Memory 0101 - Subtract AC from Memory 0110 - Store AC to I/O 0111 - Add to AC from Device 1000 - Subtract Device from AC 1001 - Subtract AC from Device 1010 - Halt Program Begin Memory at location 500 and Program Counter at 500 Memory location 870 has 12 stored Device 4 has 3 stored Hypothetical machine should do the following code: Load AC from memory 870 Subtract device 4 from AC Store from AC to device 2 Add to AC from memory 870 Store AC to memory 871 Add to AC from device 4 Subtract device 2 from AC Store from AC to memory 870 Add to AC from memory 871 Halt Program
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