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answer each of the following with reference to the timer-driven sequencer program shown in figure 12-42a how many bit
1 sequencer instructions are usually retentive explain what this means2 compare the operation of an event-driven and a
1 when using a sensor as the input to the bit address of a bsl instruction what is its function2 compare the operation
1 what is the function of the unload bit in a bsl instruction2 what is the function of the unload bit in a bsr
1 what is the primary application in which an sql instruction is used2 explain the function of a sequencer load
1 what is the function of the file of a sequencer2 what is the function of the mask in the sequencer instruction3 what
1 describe the operation of a drum switch2 what type of operations are sequencers most suitable for3 why are plc
assume that prior to putting a plc system into operation you want to verify that each output device is connected to the
1 the same address is used for two coil instructions within the same plc program what will happen as a consequence of
1 what information is provided by the cross reference function2 what information is provided by the contact histogram
1 what operating state will cause an inductive load to generate a very high voltage spike2 explain how a diode is
a what type of input field devices and output modules are most likely to have a small leakage current flow when they
1 list three potential noise-generating inductive devices2 describe four ways in which careful wire routing can help
1 why are plcs installed within an enclosure2 what methods are used to keep enclosure temperatures within allowable
1 which routine is configured to execute first name the four types of programming languages that can be used to
1 explain the function of tasks within the project2 state the three main types of tasks3 what type of tasks function as
1 compare the memory configuration of a logix 5000 controller with that of an slc 500 controller2 what does a project
1 in a home heating system with onoff control what will be the effect of widening the deadband2 a calculate the
1 what is fieldbus used for2 summarize the two main functions of a scada system3 in what way does distributive control
1 explain how redundant media works2 define the term bandwidth as it applies to a network3 what is ethernetip used for4
1 compare the transmitting distances of rs-232 and rs-422485 serial types2 what is devicenet used for3 list three
1 compare half-duplex and full-duplex data transmission2 explain how networking schemes minimize the amount of wiring
1 summarize the token passing network access method2 summarize the collision detection network access method3 summarize
1 define the term protocol as it applies to a network2 what is the function of a network gateway3 define the term
1 list four types of communication tasks provided by local area networks2 name three common types of transmission