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SERVICE MANUAL
ER-A457
ONLINE COMMUNICATION FUNCTION
ELECTRONIC CASH
REGISTER
MODEL
MODEL ER-A457
(For "V" version)
SHARP CORPORATION
This document has been published to be used
for after sales service only.
The contents are subject to change without notice.
Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
CHAPTER 1. OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. S YSTEM CONFIGURATION. . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 3. S PECIFICATIONS OF RS-232 INTERFACE . . . . . . . . . 2
CHAPTER 4. SIGNAL CONNECTION DIAGRAM. . . . . . . . . . . . . . . . . 2
CHAPTER 5. RS-232 PROTOCOL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CHAPTER 6. CONTROL SIGNAL SEQUENCE . . . . . . . . . . . . . . . . . 11
CHAPTER 7. DATA BLOCK FORMAT . . . . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 8. ONLINE APPLICATION. . . . . . . . . . . . . . . . . . . . . . . . . 14
CONTENTS
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CHAPTER 1. OVERVIEW
1. GENERAL
This is a specification of the on-line data communication via RS-232
interface of the ER-A457
It enables the ER-A457 to perform on-line communication.
For on-line data communication a ER-457 can be connected
to a host computer. Also, their connection can be made via modems.
We support mainly the following functions.
a) The function of ONLINE
1) Down load of ECR data (ECR
← PC)
2) Up load of ECR data (ECR
→ PC)
3) RJE (Remot e job entry) function (ECR
← PC)
4) ELECTRONIC MAIL function (ECR
← PC)
CHAPTER 2. SYSTEM
CONFIGURATION
1. GENERAL
Online data communication is allowed only when RS232 channel
presets at PGM2 mode.
2. Online data communication
(a) Direct connection
Host computerER-A457
Host computer
ER-A457
Modem Modem
* The picture of ECR is shown the ordinary ECR.
(It may not be same design as ER-A457.)
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CHAPTER 3. SPECIFICATIONS OF
RS-232 INTERFACE
1. Onli ne interface
a) Interface : RS-232
b) Duplex type : Half-duplex / Full-duplex
c) Line configuration : Direct connection/Modem connection
d) Data rate : 19200, 9600, 4800, 2400, 1200, 600 and
300 bps
(Programable)
e) Synchronizing mode : Asynchronous
f) Parity check : Vertical parity check (odd)
g) Code : ASCII
h) Bit sequence : LSB first
i) Data format : 1 start bit + 7 data bits + 1 parity +
1 stop bit
j) Protocol : Polling/selecting (Simple procedure)
k) Transmission line :
Cable : Shielded cable
Connector
(ECR side)
: D-sub 9 pin (female type) connector
Inch pitch (4-40 UNC) lock screw
Connector cover : Shielded cover
The table shows the relationship between the data rate and the recommended cable length.
Data rate Recommended cable length
19,200 bps 3.75 meters
9,600 bps 7.5 meters
4,800 bps 15 meters
2,400 bps 30 meters
1,200 bps 60 meters
CHAPTER 4. SIGNAL CONNECTION
DIAGRAM
1. Connection between the master (Host)
and S a t ellite
SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR: DATA SET READY
RTS : REQUEST TO SEND
DCD: DATA CARRIER DETECTOR
CTS : CLEAR TO SEND
FG : FRAME GROUND
If the connector of Host side is "9 PIN D-SUB", the pin number is
same as Satellite side.
Data-bit
Parity-bit St op-bit
b1 b2 b3 b4 b5 b6 b7
P
Start-bit
SD
2
SD
RD
CTS
RD
3
6
5
3
2
6
8
HOST
75
SG
RTS
4
DCD
8
DTR
20
DSR
7
1
4
SATELLITE
CTS
SG
RTS
DCD
DTR
DSR
1
FG
FRAME GROUND is connected
to the shield of the cable.
25PIN D-SUB 9PIN D-SUB
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2. Connection between the terminal and
MODEM
SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR: DATA SET READY
RTS : REQUEST TO SEND
DCD: DATA CARRIER DETECTOR
CTS : CLEAR TO SEND
CI : CALLING INDICATOR
FG : FRAME GROUND
SD SD
RD
SG
RD
3
2
4
6
7
1
8
5
2
3
20
6
4
8
5
7
RTS
DCD
DTR
DSR
CTS
CI
22 9
SG
RTS
DCD
DTR
DSR
CTS
CI
FG
1
FRAME GROUND is connected
to the shield of the cable.
MODEM TERMINAL
25PIN D-SUB 9PIN D-SUB
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CHAPTER 7. 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 8. ONLINE application
1. ONLINE preset
1) SRV programming: NONE
2) PGM programming
Job# PGM-MODE programming for online operation
2690 The assignment of RS232 channel by each devices.
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.
6115 Programming of time out value
6110 Online Preset reading
[JOB#2690] M RS = 00 00
The assignment of RS232 channel by each devices.
X: 1
A: On-line 2690-A
No 0
Yes (Channel No. = 8) 8
[JOB#6110] M RS = 00 00 01
Programming of the terminal number
NK: Terminal No. = 0 to 999999
1) ID- EN Q :
10bytes
ENQ code (05h)
Terminal N o. 00 0001 -9 99 999 ( 6 by t es )
EOT is set as dummy cahracters. (3 bytes)
2) ACK : 1 byte 06h
3) NA K :
1 byte 15h
4) EOT :
1 byte 04h
5) EN Q :
1 byte 05h
6) TEXT :
Data ASCII (max. 250 bytes)
Block co ns ec ut i v e 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
23
2690
X
X
X
ABCD
ST TL
0
6110 NK
0
x
TL
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[JOB#6111] M RS = 00
Programming of the modem control
6111-A: 1. Sensing of the CI signal Yes/No
1. Sensing of the CI signal 6111-A
No 0
Yes 1
6111-B: 1. Duplex type
1. Duplex type 6111-B
Full duplex system 0
Half duplex system 1
[JOB#6112] MR S = 5
Programming of the transmission baud rate
6112-A: Transmission baud rate
Transmission baud rate 6112-A
300 bps 0
600 bps 1
1200 bps 2
2400 bps 3
4800 bps 4
9600 bps 5
19200 bps 6
[JOB#6113] M RS = 00 20 13
Programming of the start and end code
XXX: Start code = 02H (STX)
YYY: End code = 0DH (CR)
[JOB#6115] M RS = 00 7
Programming at the time-out value.
XXX: 1
∼ 255 sec
[JOB#6110]
Online preset reading
6111 AB
0
x
TL
6112 A
0
x
TL
6113 XXXYYY
0
x
TL
6115
XXX
x
TL
6110
TLx
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COPYRIGHT 2001 BY SHARP CORPORATION
All rights reserved.
Printed in Japan.
No part of t his publication may be reproduced ,
stored in a r etrieval system, or transmitted,
in any form or by any means,
electro nic, mechanica l, photocopyi ng, recording, o r otherwise,
without pr ior written permis sion of the publi sher.
SHARP CORPORATION
Information Systems Group
Quality & Reliability Control Center
Yamatokoriyama, Nara 639-11, Japan
2001 April Printed in Japan
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