1. PLC's were originally developed as replacements for a. microcomputers Is for b. relay control panels 12 c. analog con

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1 Plc S Were Originally Developed As Replacements For A Microcomputers Is For B Relay Control Panels 12 C Analog Con 1 (66.61 KiB) Viewed 25 times

1. PLC's were originally developed as replacements for a. microcomputers Is for b. relay control panels 12 c. analog controllers d. digital controllers 2. The phases of the program scan, in correct order, are a. set inputs, force outputs b. read inputs, solve logic, communication and memory management set outputs, c. read inputs, set outputs, solve logic, communication and memory management d. read inputs, communication and memory management, solve logic, set outputs 3. The external circuitry between the field sensors and Discrete Input modules is usually separated from the internal logic circuits by a. shielded cabling b.ground plane c. barrier strip terminals d. optoisolators 4. If input 1:1/0 is a NO pushbutton (PB), and input 1:1/1 is a NC limit switch (LS), which combination of inputs will cause the output to be energized on this rung? 1:1/1 1:1/0 1-1/E - ()-1 a. PB not pressed, LS not pushed b. PB not pressed, LS pushed c. PB pressed, LS not pushed d. PB pressed, LS pushed 5. An RTO timer requires to return the Accumulator value to zero. a. rung condition change from true to false b. an OSR instruction c. a Reset instruction d. a Mode change from Run to Program 6. If a timer's Time Base is 0.01 sec, and the Preset value is 3000, the timer's delay time is a. 3.01 seconds b. 30.00 seconds c. 300.0 seconds d. 3000 seconds