Explain how process variables turn into displayable or usable information for a PLC.

What will be an ideal response?


In order for process information to be transmitted and made available for display and/or control, there will always be some type of signal conversion that will take place, and in most cases, more than one conversion.

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The GPS system consists of how many satellites?

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A diff-amp with two out-of-phase signal voltages applied to the two inputs is called:

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To provide accurate control under low-load conditions, the controlled device must be able to maintain stable flow at very low flow rates. Such a device is said to have good ____.

a. modulation b. variability c. machining d. rangeability

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