
XE-A201UC
– 10 –
CHAPTER 7. TEXT BLOCK FORMAT
1. BASIC FORMAT
Start code : This code may not be provided.
Null is impermissible.
End code : This code may not be provided.
Null or any same code as the start code is
not permissible.
When master reset is performed, the default is assumed:
Start code = 02h
End code = 0Dh
Block consecutive No. : This number starts with 30h and cycles
like this: 30h, 31h
.
39h, 30h, 31h
(Ring counter system)
Check sum
: 2 bytes hex number
Low-order 8-bit data of the complement of
2 for the sum of text data.
RAM data
: Even number of data that is obtained by
dividing one byte of RAM data into high-
order 4 bits and low-order 4 bits and con-
verting them to ASCII codes shown in the
code conversion table.
Code conversion table.
1) ID-ENQ :
10bytes
ENQ code (05h)
Terminal No. 000001-999999 (6 bytes)
EOT is set as dummy cahracters. (3 bytes)
2) ACK :
1 byte 06h
3) NAK :
1 byte 15h
4) EOT :
1 byte 04h
5) ENQ :
1 byte 05h
6) TEXT :
Data ASCII (max. 1000
bytes)
Block consecutive No.
Start code
End code
Check sum
Print code (high-order or low-order 4 bits)
Line image
Bit image
Hexadecimal
ASCII
0000
0
30h
0001
1
31h
0010
2
32h
0011
3
33h
0100
4
34h
0101
5
35h
0110
6
36h
0111
7
37h
1000
8
38h
1001
9
39h
1010
A
41h
1011
B
42h
1100
C
43h
1101
D
44h
1110
E
45h
1111
F
46h
Example
Memory image
Line image
02
5A
F0
1
2
3
30h
32h
35h
41h
46h
30h
Transmission sequence
1
2
3