Disadvantage of PLC is _________

PLC stands for_______

If the I/O Count of PLC is between 32 to 128 then it is called as ___________.

Output modules are available in various switching and _______configurations.

The devices connected to PLC for sending status information are called _______field devices.

Hand held terminals is an example for___________.

In PLC the user program is stored in ________ memory.

Input modules provide an interface between ______________and_____________.

PLC I/O systems provides an interface between __________ and ___________.

Electrical isolation is provided so that there is no physical electrical connection between the CPU and output field devices. This isolation is usually accomplished by____________

1K of memory is equal to ________

Power signal that the output module switches to control field devices must be provided by__________

A _____ is usually mounted on one end of each rack, backplane, or chassis.

The programming device must be connected ____________ to the controller

The basic difference between plc and relay control system is ___________

The abbreviations NO and NC represents the electrical state of switch contacts when_______________.

NC push button connected in hardware & NC contact in software then the coil connected to the NC contact will be ___________

A limit switch is usually actuated by_________.

A thermocouple ,when heated _______

A________converts electrical pulses applied to it into discrete rotor movement

Digital I/O modules operate on___________

PNP type proximity sensor is compatible with __________ input module.

NPN type proximity sensor is compatible with __________ input module

Discrete input modules accept signals from field devices that are________

A discrete input signal is considered valid if the signal is________

Thumbwheels switches provide input to the PLC in _______ format

Discrete output interface modules send signals to field devices that are__________

Discrete output modules act as a _________ to control output field devices

Typical discrete output devices include_______

Changing signals like temperature control or the 4 to 20-milliamp-speed reference for a variable-frequency drive are called ______ signals

Suppose you need to select a module to interface AC or DC, two-state, ON/OFF, or OPEN/CLOSED incoming signals.which will you choose

Suppose you need to select a module to inter face out going AC or DC,two state, ON/OFF, or OPEN/CLOSED outgoing signals.Which will you choose

Suppose you need to select a module to interface a continuously changing incoming voltage or current signal.which will you choose

A discrete input module which can be interfaced is ___________

Volatile memory is__________

Nonvolatile memory is________

The processor in any PLC is designed to perform specific duties in a specific sequence and then continuously repeat the sequence.The operating cycle is called __________

The scan consists of a series of sequential operations which include, Reading________, program execution, data output

If the input devices change its state while the processor is in program scan or output scan of the scan cycle then the plc will _____________

If two NC contacts are connected in series that satisfies _______Gate logic

NC contact can be used to satisfy ________gate condition.

If two NO contacts are connected in series that satisfies _______Gate logic.

If two NC contacts are connected in parallel that satisfies _______Gate logic.

The logical OR function is similar to connecting two NO contacts in _____________

Status of input devices are stored in ________ Register.

Each instruction on a ladder diagram has a reference number associated with it which is_________

Holding register is also known as_______.