Problems The following binary PLC sequencer code information is to be programmed

Question

Problems The following binary PLC sequencer code information is to be programmed using the hexadecimal code. Convert each piece of binary information to the appropriate hexadecimal code for entry into the PLC from the keyboard. 1. b. 0010 0101 . 0100 1110 d. 0011 1001 The encoder circuit shown in Figure 3-16 is used to convert the decimal digits on the keyboard to a binary code. State the output status (HIGH/LOW) of A-B-C-D when decimal number 2. a. 2 is pressed. b. 5 is pressed. c. 7 is pressed. d. 8 is pressed. Encoder Low 4 inout High 0100 output produced FIGURE 3-16 3. If the bits of a 16-bit word or register are numbered to the octal numbering system, beginning with 00, what consecutive numbers would be used to represent each of the bits? 4. Express the decimal number 18 in each of the following number codes: a. Binary b. Octal d. BCD

Explanation / Answer

Answer:-----------

1. Binary to Hexadecimal ?

2.

4.

Given, Decimal Number = 18

Decimal Number Pressed Which Input will High or Low A B C D Binary Code a. 2 is pressed 2 input High Low Low High Low 0010 b. 5 is pressed 5 input High Low High Low High 0101 c. 7 is pressed 7 input High Low High High High 0111 d. 8 is pressed 8 input High High Low Low Low 1000

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