1. A typical motor speed control circuit that is controlled by an analog current loop will...
1.Which one of the following terms is used to define the identifying letters placed above an input contact in ladder logic? A. Statement B. Locator C. Surname D. Title 2.Which one of the following statements is true of a disabled contact or coil? A. A disabled contact or coil is caused by a faulty memory location in the PLC. B. The disabled element has been automatically disabled due to module failure. C. A contact must be in the disabled state...
A baking oven conveyor system (to bring raw dough through an oven to bake bread) needs the ladder logic to be built for proper function. Here is the sequence of events: a. A Conveyor Motor relay output will start (and will be latched/set on) when a normally open pushbutton (Start Conveyor) or a normally open sensor (Package Sensor) energizes. A normally closed E-Stop (Emergency Stop) push button that is not energized is in series with the aforementioned circuit components. b....
. What is a programmable logic controller (PLC)?12. The , Identify four tasks in addition to relay switching operations that PLCs are capable performing. 3. List six distinct advantages that PLCs offer over controller operates in real time. What does this mean? of performing 13. Answer the following with reference to the f conventional relay-based control systems. control PLC ladder logic diagram of Figure 1-21 this etary PLC architecture. 5. State two ways in which LVO is incorporated into 4,...
answere Please mark only one of the four choices Q1. Controlling the speed of a DC motor by using a micro-controller, is what type of control? b. Digital C. Analog d. All of the above Q2. When current flow is interrupted in a DC motor, which motor property causes a reverse voltage spike? a. Resistance b. Capacitance C. Inductance d. None of the above Q3. Which Arduino internal circuit is used to control motor speed? a. Digital to Analog Converter...
The control speed of brushless DC motor will typically use the following type of process control: a. Modulating b. Open Loop c. On-off d. Feedforward
Problem 17. PLC VFD 1-D stage LLS RLS RLS 0 LLS 0 TE TR The logic for a control bit A is A= R+L A Micrologix 1000 CTU counter module with counter enable CU and counter control relay CDN will be used to count the number of times the carriage energizes LLS. To do that, each time TE has a negative edge, the counter module's accum is incremented. Before the counter's accum reaches its preset, we want to force control...
The type of transistor configuration that’s used with a DC servo motor is the A. negative-logic configuration. B. totem pole configuration. C. H-bridge configuration. D. emitter-follower configuration. An inverter can be programmed to stop an AC motor quickly by enabling A. an internal brake. B. DC voltage injection to the motor. C. a stationary AC waveform. D. a reverse pulse action. You’re looking at a tachometer feedback signal on an oscilloscope. The waveform takes a long time to go to...
Problem 1: Speed versus time plot of a small DC motor is obtained when 1 Volt input is applied. The response curve is shown below: a) Approximate the open loop transfer 6 function, G(s) of the DC motor. b) A simple proportional controller (P- controller) is applied to the same DC motor. The control goal is to track a constant target speed ofr 150 rpm. Determine the control gain Kp which guarantees an offset error of e 5 rpm. (i.e.,...
a) Draw a ladder diagram for programming circuit for a motor. Include in the ladder diagram provision for a light to come on after a set period has passed since the motor was swtiched on. Label each element of the ladder diagram clearly. (4 marks) a PLC providing a standard latch input-output relationship which can a first order differential equation of the form below (output y initially zero, and a unit step input into the system, how long will it...
Circle or fill in the correct response. Unless otherwise noted, all answers will be worth 6 points: 1. A mushroom head push button on an emergency stop circuit typically uses N.O / N.C contacts 2. Multiple start buttons are connected in series/parallel in a motor control circuit 3. Multiple stop buttons are connected in series/ parallel in a motor control circuit 4. If a hardwired circuit required a second load to energize a set amount of time after turning the...