Read Sharp ER-A490 (serv.man4) Service Manual online
CHAPTER 8. DATA 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.
not permissible.
When master reset is performed, the default is assumed:
Start code = 02h
End
End
code
=
0Dh
Block consecutive No. : This number starts with 30h and cycles
like this: 30h, 31h — 39h, 30h, 31h (Ring
counter system)
counter system)
Check sum
: 2 bytes hex number
Low-order 8-bit data of the complement of
2 for the sum of text data.
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.
order 4 bits and low-order 4 bits and con-
verting them to ASCII codes shown in the
code conversion table.
Code conversion table .
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
CHAPTER 9. RS-232 application
1. RS-232 preset
1) SRV programming
[JOB#945] MRS = 0000
The assignment of RS-232 channel by each devices.
945-A: Channel No. for ONLINE = 0 to 7.
945-B, C, D: Not used (Fixed at "000")
945-B, C, D: Not used (Fixed at "000")
*
When channel No. for online is zero, online system is nothing.
*
Do not select the same channel number for two or more devices.
*
Use the switches on the I/F board to set the channel No. for the I/F
board connector. (Refer to the RS-232 channel setting in III.
HARDWARE DESCRIPTION FOR ER-A5RS.)
board connector. (Refer to the RS-232 channel setting in III.
HARDWARE DESCRIPTION FOR ER-A5RS.)
2) PGM programming
Job#
PGM-MODE programming for online operation
6110
Programming of the terminal number
6111
Programming of the modem control
6112
Programming of the transmission data rate (Bau
rate)
rate)
6113
Programming of the start and end code.
6115
Programming of time out value
6110
Online Preset reading
[JOB#6110] MRS = 000001
Programming of the terminal number
NK: Terminal No. = 0 to 999999
945
ABCD
0
x
TL
6110
NK
0
x
TL
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. 250 bytes)
Block consecutive No.
Start code
End code
Check sum
Example
Memory image
Line image
02
5A
F0
1
2
3
30h
32h
35h
41h
46h
30h
Transmission sequence
1
2
3
1 – 16
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