Appendix D How to Use PLC Function

X0

1

The output of Y0 will be decided by circuit

 

 

 

Y0

2

 

 

 

 

 

, i.e. decided by On/Off of X10.

Y0 is repeated

X10

Y02

D.4.3 Value, Constant [K] / [H]

Constant

K

Decimal

K-32,768 ~ K32,767 (16-bit operation)

 

 

 

H

Hexadecimal

H0000 ~ HFFFF (16-bit operation)

 

 

 

There are five value types for DVP-PLC to use by the different control destination. The following is the explanation of value types.

1.Binary Number (BIN)

It uses binary system for the PLC internal operation or storage. The relative information of binary system is in the following.

Bit

: Bit is the basic unit of binary system, the status are 1 or 0.

Nibble

: It is made up of continuous 4 bits, such as b3~b0. It can be used to represent

 

number 0~9 of decimal or 0~F of hexadecimal.

Byte

: It is made up of continuous 2 nibbles, i.e. 8 bits, b7~b0. It can used to represent

 

00~FF of hexadecimal system.

Word

: It is made up of continuous 2 bytes, i.e. 16 bits, b15~b0. It can used to represent

 

0000~FFFF of hexadecimal system.

Double

: It is made up of continuous 2 words, i.e. 32 bits, b31~b0. It can used to

Word

represent 00000000~FFFFFFFF of hexadecimal system.

The relations among bit, nibble, byte, word, and double word of binary number are shown as follows.

 

 

W1

DW

 

W0

 

 

 

Double Word

 

 

 

 

 

 

 

 

 

 

 

 

 

Word

 

 

 

 

 

 

 

 

BY3

 

BY2

 

BY1

 

BY0

 

Byte

NB7

NB6

NB5

NB4

NB3

NB2

NB1

NB0

 

 

Nibble

 

 

 

 

 

 

 

 

 

 

Bit

 

 

 

 

 

 

 

 

 

2.Octal Number (OCT)

The numbers of external input and output terminal of DVP-PLC use octal number.

Example:

External input: X0~X7, X10~X17…(device number)

Revision June 2008, 04EE, SW--PW V1.11/CTL V2.11

D-21

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Delta Electronics VFD-E manual Value, Constant K / H