How are the inputs assigned in the PLC described in this chapter?
What will be an ideal response?
In this example the on-off switch is assigned to input 1, the pressure switch is assigned to input 2, the auto terminal of the selector switch is assigned to input 4, the pump 1 terminal is assigned to input 3, and the pump 2 terminal is assigned to input 5. Note that one side of each input device has been connected to the hot or ungrounded power terminal. The other side of each input device is connected to the appropriate input terminal. PLCs do not provide power to the input or output terminals. The inputs and outputs must have power provided to them. The common (C) input terminal is connected to the neutral or grounded power conductor.
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Describe how building codes relate to flooring.
What will be an ideal response?
The MOST-LIKELY result of a battery explosion is:
A. fuel-fire B. blindness C. popback D. engine damage
Which step is NOT required in developing ladder logic with BCD conversion instructions?
A) Determine the Boolean equations for the BCD instructions. B) Determine the type of registers based on the size of BCD number. C) Determine the use of the one-shot instruction. D) Determine the type of BCD instructions to use.
Illustrations or renderings are sometimes referred to as a third type of drawing because:
A. They artistically present a technical object. B. Mechanical instruments are used to complete them. C. They attempt to convey some abstract feelings such as mood or attitude. D. They combine technical information and processes and artistic expression.