Chapter 8 Communication Functions

(3) Response format (ACK response)

 

 

Format name

 

 

Header

 

 

Station

 

 

Command

 

 

Command

 

 

Number of

 

 

Number

 

 

data

 

 

......

 

 

Tail

 

 

Frame

 

 

 

 

 

 

 

 

No.

 

 

 

 

type

 

 

blocks

 

 

of data

 

 

 

 

 

 

 

 

check

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ex. of frame

 

ACK

 

 

H20

 

R(r)

 

 

SS

 

 

H01

 

 

H02

 

 

HA9F3

 

 

 

 

ETX

 

 

BCC

 

 

 

ASCII value

 

H06

 

 

H3230

 

H52(72)

 

 

H5353

 

 

H3031

 

 

H3032

 

 

H41394633

 

 

H04

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 block(max. 16 blocks possible)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Item

 

 

 

 

 

 

 

 

 

 

 

 

 

Explanation

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When command is lowercase(r), only one lower byte of the value resulted by adding 1 Byte

 

 

 

BCC

 

 

 

each to ASCII values from ACK to ETX is converted into ASCII and added to BCC, and

 

 

 

 

 

 

 

 

sent.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of data means byte number of hex type, and is converted into ASCII. This number

 

 

 

 

 

 

 

 

is determined according to data type(X,B,W) included in device name of computer request

 

 

 

 

 

 

 

 

Format.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Number of data in accordance with its data type is as follows:

Number of data

 

 

 

 

 

 

 

 

 

 

Data type

 

 

Available variable

 

 

 

Number of data

 

 

 

 

 

 

 

 

 

Bitl(X)

 

%(P,M,L,K,T,C,F)X

 

1

 

 

Byte(B)

 

%(P,M,L,K,T,C,D,S,F)B

 

1

 

 

Word(W)

 

%(P,M,L,K,T,C,D,S,F)W

 

2

 

 

 

 

 

 

 

 

 

 

Data

In data area, there are the values of hex data converted to ASCII code saved.

Ex.1

The fact that number of data is H04(ASCII code value:H3034) means that there is hex data of 4 bytes in data . Hex data of 4 bytes is converted into ASCII code in data.

Ex.2

If number of data is H04 and the data is H12345678, ASCII code converted value of this is "31 32 33 34 35 36 37 38," and this contents is entered in data area. Name directly, highest value is entered first, lowest value last.

Remark

1)If data type is Bit, data read is indicated by bytes of hex. Namely, if Bit value is 0, it indicated by H00, and if 1, by H01.

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LG Electronics 120S user manual Communication Functions, Response format ACK response