Chapter 11

Question 1

To a predetermined step by step process that accomplishes a specific task.

Answer 1

Sequencing

Question 2

Frequently used for reversing the direction of AC and DC motors, or for controlling multispeed motors with two to four speed settings

Answer 2

Drum Switches

Question 3

An output instruction that uses a file or an array to control various output devices

Answer 3

Sequencer output (SQO)

Question 4

An input instruction that compares bits from an input file or array to corresponding bits from a source address

Answer 4

Sequencer input (SQI)

Question 5

An output instruction that compares bits from an input source file to corresponding bits from data words in a sequence file. If all pairs of bits are the same then a bit in the control register is set to 1

Answer 5

Sequencer compare (SQC)

Question 6

An output instruction that functions like a word to file or file to file transfer

Answer 6

Sequencer load (SQL)

Question 7

In the starting address for the registers in the sequencer file and you must use the indexed file indicator (#) for this address

Answer 7

File

Question 8

The coed or bit pattern through which the sequencer instruction moves source data to the destination address

Answer 8

Mask

Question 9

The address of the input word or file for an SQC from which the instruction obtains data for comparison to its sequencer file

Answer 9

Source

Question 10

The address of the output word or file for an SQO to which the instruction move data from its sequencer file

Answer 10

Destination

Question 11

The address that contains parameters with control information for the instruction and discrete output to indicate sequencer instruction

Answer 11

Control

Question 12

The found bit (FD) is only used for the SQC instruction

Answer 12

Bit 8

Question 13

The error bit (ER) indicates a negative position value or negative or zero length value

Answer 13

Bit 11

Question 14

The done bit (DN) is set by the SQO or SQC instruction after it has operated on the last work in the sequencer file

Answer 14

Bit 13

Question 15

The enable bit (EN) is true when the rung goes form false to true and is used to indicate that SQO and SQC instruction is enabled to active.

Answer 15

Bit 15

Question 16

The number of steps of the sequencer file starting at position 1

Answer 16

Length

Question 17

The word location or step in the sequencer file from/to which the instruction moves data

Answer 17

Position

Question 18

SQO

Answer 18

Sequencer output

Question 19

SQI

Answer 19

Sequencer input

Question 20

SQC

Answer 20

Sequencer Compare

Question 21

SQL

Answer 21

Sequencer Load

Question 22

Bit 8

Answer 22

FD

found bit

Question 23

Bit 11

Answer 23

ER

error bit

Question 24

Bit 13

Answer 24

DN

done bit

Question 25

Bit 15

Answer 25

EN

enable bit

Question 26

SQO instruction operation during the first scan

Answer 26

o If the rung is true at the time of the first scan and the position parameter is 0, then the data in the memory location at position 0 is transferred through the mask to the destination register and the position pointer is incremented by 1.

o If the rung is false at the time of the first scan and the position parameter is 0, then the data in the memory location at position 0 is NOT transferred to the destination register and the position pointer is NOT incremented.

Question 27

SQO instruction operation after the first scan

Answer 27

o When the rung has a false to true transition the position pointer is incremented by 1 and the data in the memory location at the new position is moved through the mask to the destination file.

o If the position memory location data changes while the rung is true, the SQO continues to update the destination file on every scan.

o When the rung goes false the output is no longer updated, and the SQO instruction waits for the next false to true rung transition.