Sharp ER-A570, Service Manual

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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.
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 .
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: Not used. (Fixed at "0")
945-C: Not used. (Fixed at "0")
945-D: Not used. (Fixed at "0")
∗
When channel No. is zero, system is nothing.
∗
Do not select the same channel number with 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 IV.
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)
6113 Programming of the start and end code.
6110 Online Preset reading
[JOB#6110] MRS = 000001
Programming of the terminal number
NK: Terminal No. = 0 to 999999
TL 945 ABCD
0
X
TL 6110 NK
0
X
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
2  15