Deck 3: Number Systems

Question 1

ControlLogix has a basic memory allocation of ____________________ bits, or a double word.

Answer 1

32
thirty two
thirty-two

Question 2

What is the base 2 value of AF1B316?

Answer 2

AF1B316 = 1010 1111 0001 1011 00112

Question 3

Computers do not accept decimal numbers as inputs because they cannot convert from decimal to binary format.

Answer 3

False

Question 4

What are the symbols used in the hexadecimal numbering system?

Question 5

In the PLC world, a device on a network is referred to as a(n) ____________________.

Question 6

When programming or maintaining modern PLCs, you are likely to come across hexadecimal numbers in many different situations. What are two common instances of using hexadecimal numbers?

Question 7

When creating a tag in RSLogix 5000 software, what two attributes are assigned to the tag?

Question 8

A 16-bit word is made up of two bytes, an upper and a lower byte. Each byte is broken down into an upper and a lower ____________________.

Question 9

What is the data range for a 16-bit signed integer?

Question 10

One method of converting binary to hexadecimal is to start with the least significant bit (LSB) and break the binary number into groups of ____________________ bits.

Question 11

Traditional PLCs allocate a portion of the controller's physical memory segmented into data files for the storage of program-related information.

Question 12

The number of unique symbols used to represent numbers in a particular number system is indicated by the ____________________.

Question 13

In a 16-bit signed integer, the right-most bit represents the sign of the binary value.

Question 14

When programming instructions to add, subtract, multiply, divide, or compute, the expected size and format of the source tag or tags and answer tag must be taken into consideration.

Question 15

The SLC 500, MicroLogix, and PLC-5 are examples of 16-bit PLCs.

Question 16

List three reasons why specific number system understanding is important.

Question 17

The positional value of 2 in the decimal number 12,345 is 2 × 104.