User Documentation

Communications

66 1435710000/01/05.13

• Block check code Bcc (H), (L)

◊ Two-digit hexadecimal 00 to FF (ASCII codes)

◊ These are codes (horizontal parity) that are used to detect errors in the transmitted data.

◊ If “**” is entered instead of “Bcc”, however, messages can be transmitted without the Bcc. In this case,

the Bcc is included with the response

• Error code Err (H), (L)

◊ Two- digit hexadecimal 00 to FF (ASCII codes)

◊ These indicate the content if an error occurs.

Bcc (Block Check Code)

• The Bcc is a code that carries out an error check using horizontal parity, to improve the reliability of the

data being sent.

• The Bcc uses an exclusive OR from the header (%) to the final character of the text, and converts the 8- bit

data into a 2-character ASCII code.

Example:

0 1 # R T 0 1 CR

↑ ↑ ↑ ↑ ↑

Header Station No.1 Command

Command

2-character

Bcc

% 0 1 # R T

0 1

25H 30H 31H 23H 52H 54H Bcc(H)=0(30H)

Bcc(L)=1(31H)

① Takes exclusive OR

② Converts to ASCII format