1.
The __________________ instruction is used to turn an output ON or OFF after its time has been on for a preset time interval
A
none of these
B
retentive time
C
timer and delay
D
timer off delay
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The __________________ instruction is used to turn an output ON or OFF after its time has been on for a preset time interval
none of these
retentive time
timer and delay
timer off delay
A good application for a timed interrupt in a PLC program would be
A motor start/stop rung
A math function block
A PID function block
A communication function block
An OR function implemented in Ladder logic uses
normally open contacts in parallel
normally closed contacts in series
normally open contacts in series
normally closed contacts in parallel
In PLC programming, a retentive function is one that
cannot be edited or deleted
Default points to the On State
Default points to the Off State
is not reset after a power cycle
To protect a PLC from any incoming surges from the field, an isolated device such as ____________ is used.
DAC
Transformer
Transducer
ADC
For a 16-bit register, which is the largest integer number a PLC counter function can reach
32,767
32,768
65,535
65,536
______________ language can be programmed interactively with the PLC
C
Online
Offline
Basic
Main difference between online and offline PLC programming is
the type of program used
where the edited program resides
whether the programming PC has internet connectivity
whether the PLC is running or stopped
Medium PLC has _____________ inputs and outputs
4000 - 8000
100 - 200
1000 - 4000
2000 - 4000
HMI means __________ Machine Interface
High
Human
Hard
Heart
In a PLC, scan time refers to the amount of time in which
the technician enters the program
timer and counters are indexed by
one rung of ladder logic takes to get complete
the entire program takes to excecute
PLCs having less than __________ inputs and outputs are called as Small PLC
200
50
100
150
Ladder Logic Programming consists primarily of
text-based codes
logic gate symbol and connecting lines
virtual relay contacts and coils
function blocks and connecting lines
Unitary PLC has 20 inputs and __________ outputs
10
20
18
12
PLC is an acronym of _______________ Logic Controller
Pneumatic
Programmable
Peripheral
Periodic