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
23
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