List three reasons for upgrading to a more powerful PLC.
What will be an ideal response?
In many cases, upgrading to a more powerful PLC is due to shortcomings of the current PLC platform in some or all of the following:
• Number of I/O points
• Programming instructions
• Adequate controller memory
• Newer programming languages
• Ability to integrate multiple pieces of the system into one platform
• Communication capabilities
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The programming process consists of several steps, which include:
a. key words, operator definitions, punctuation b. design, creation, testing, debugging c. input, processing, output d. syntax, logic, error handling e. None of these
Which of the following is a form control that allows a user to click a list arrow to display the list and make a selection?
A. option list B. drop-down list box C. list box D. choice list
The queue operation ____ returns the first element of the queue.
A. tail B. insert C. front D. delete
COGNITIVE ASSESSMENT Which of the following is NOT true about command-line interfaces?
A. A user types keywords or abbreviations to enter data and instructions. B. They require exact spelling, form, and punctuation. C. They give you less control to manage detailed settings than a GUI. D. The set of commands used to control actions is called the command language.