ICP DAS USA | I-7523 | User manual | ICP DAS USA I-7523 User Manual

ICP DAS USA I-7523 User Manual
I-7521/I-7522/I-7522A/I-7523/I-7524
/I-7527
User’s Manual
Warranty
All products manufactured by ICP DAS are warranted against defective materials for a
period of one year from the date of delivery to the original purchaser.
Warning
ICP DAS assume no liability for damages resulting from the use of this product. ICP
DAS reserves the right to change this manual at any time without notice. The
information furnished by ICP DAS is believed to be accurate and reliable. However, no
responsibility is assumed by ICP DAS for its use, nor for any infringements of patents
or other rights of third parties resulting from its use.
Copyright
Copyright 2006 by ICP DAS. All rights are reserved.
Trademark
The names used for identification only may be registered trademarks of their respective
companies.
World Wide Web Home Page and FTP Site
To access ICPDAS home page go to http://www.icpdas.com
To download document and software go to http://www.icpdas.com/download/752n.htm
or ftp://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/752n/
Technical Support
Questions and requests can be sent via E-mail to service@icpdas.com
I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s Manual,Ver2.5 Aug.2015
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TABLE OF COMTENTS
CHAPTER 1
INTRODUCTION ........................................................................... 4
1.1.
OVERVIEW ................................................................................................ 4
1.2.
FEATURES ................................................................................................. 8
1.3.
DIMENSIONS ............................................................................................. 9
1.4.
PIN ASSIGNMENT .................................................................................... 11
1.5.
SPECIFICATIONS ..................................................................................... 23
1.6.
WIRING DIAGRAMS FOR APPLICATION ................................................. 25
1.6.1.
1.6.2.
1.6.3.
1.6.4.
1.6.5.
1.6.6.
1.6.7.
1.7.
CHAPTER 2
CHAPTER 3
COMPARISON TABLE .............................................................................. 32
OPERATING PRINCIPLES.......................................................... 34
2.1
INIT* PIN OPERATING PRINCIPLES........................................................ 34
2.2
DEMO CODE, FIRMWARE AND 7188XW.EXE.......................................... 36
2.3
THE RS-485 PORT AND SELF-TURNER ASIC ........................................ 37
2.4
7-SEGMENT LED DISPLAY..................................................................... 37
2.5
752N PROTOCOL DESCRIPTION .............................................................. 38
2.6
WRITING PROGRAM ON 752N ................................................................ 43
QUICK START ............................................................................. 44
3.1
CONNECTING THE I-752N MODULE ....................................................... 45
3.2
CONNECTING TO A SINGLE REMOTE RS-232 DEVICE .......................... 52
3.3
CONNECTING TO MULTIPLE REMOTE RS-232 DEVICE ........................ 57
3.4
DOWNLOADING NEW FIRMWARE TO THE I-752N MODULE ................. 60
3.4.1.
3.4.2.
CHAPTER 4
CHAPTER 5
Program download ................................................................. 25
Using a 3-wire RS-232 port ................................................... 26
Using a 5-wire RS-232 port ................................................... 27
Using a RS-485 port ............................................................... 28
Using DI/DO of I-7521(D) ...................................................... 29
Using DI/DO of I-7522A(D) ................................................... 30
Using a RS-485 of I-7522A(D) ............................................... 31
Using MiniOS7 Utility to download new firmware ............. 60
Using 7188xw.exe to download a file .................................... 62
DI/DO AND WATCHDOG........................................................... 63
4.1
DO OPERATION PRINCIPLES ................................................................. 63
4.2
DI OPERATION PRINCIPLES ................................................................... 63
4.3
DUAL WATCHDOG OPERATION PRINCIPLES ........................................ 64
4.4
HOST WATCHDOG APPLICATION NOTES.............................................. 64
4.5
MODULE WATCHDOG APPLICATION NOTES ........................................ 66
COMMAND SETS ........................................................................ 67
5.1
COMMAND SET TABLE ........................................................................... 67
5.2
ADDRESS MAPPING TABLE .................................................................... 68
5.3
COMMANDS............................................................................................. 69
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5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7
5.3.8
5.3.9
5.3.10
5.3.11
5.3.12
5.3.13
5.3.14
5.3.15
5.3.16
5.3.17
5.3.18
5.3.19
5.3.20
5.3.21
5.3.22
5.3.23
5.3.24
5.3.25
5.3.26
5.3.27
5.3.28
5.3.29
5.3.30
5.3.31
5.3.32
5.3.33
5.3.34
5.3.35
5.3.36
5.3.37
5.3.38
5.3.39
5.3.40
CHAPTER 6
$AAA[addr] ............................................................................ 69
$AABN[baud rate] ................................................................. 70
$AADN[data-bit] .................................................................... 72
$AAPN[parity-bit] ................................................................. 74
$AAON[stop-bit] .................................................................... 76
$AA6[ID] ................................................................................. 78
$AA7 ........................................................................................ 79
$AAC[delimiter] ..................................................................... 80
$AAD ....................................................................................... 81
[delimiter]AA[bypass]............................................................ 82
$AAKV .................................................................................... 83
$AATN[CrLfmode] ................................................................ 84
$AAW ...................................................................................... 86
$AAXV .................................................................................... 87
$AAYN .................................................................................... 88
$AAZNV ................................................................................. 89
#** ........................................................................................... 91
$AA4 ........................................................................................ 92
$AA5 ........................................................................................ 94
$AAF ....................................................................................... 96
$AAM ...................................................................................... 97
$AA2 ........................................................................................ 98
~** ........................................................................................... 99
~AA0 ...................................................................................... 100
~AA1 ...................................................................................... 101
~AA2 ...................................................................................... 103
~AA3ETT .............................................................................. 105
~AA4P & ~AA4S .................................................................. 106
~AA5P & ~AA5S .................................................................. 107
$AAU ..................................................................................... 108
$AAL[data] ........................................................................... 110
$AAR ..................................................................................... 112
$AAJN[timeout] ................................................................... 113
$AAGN[triggerlevel] ............................................................ 115
@AA[data] ............................................................................ 116
#AABBHH ............................................................................ 118
#AABCDD ............................................................................ 119
$AAEV .................................................................................. 120
$AAHV .................................................................................. 122
$AAIV ................................................................................... 124
APPLICATIONS ......................................................................... 125
6.1.
CNNECTING TO THE HP34401A........................................................... 125
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
6.1.6
6.2.
Connect the I-752N module to the HP34401A ................... 125
Connecting a PC to the HP34401A ..................................... 125
Connecting a single I-7522 to a single HP34401A ............. 127
Connecting multiple I-7522 modules and multiple HP34401A
129
Connecting a single I-7523 modules and two HP34401A .. 131
Connecting multiple I-7523 modules and multiple HP34401A
133
TYPICAL APPLICATIONS ...................................................................... 135
APPENDIX A MINIOS7 UTILITY ................................................................................. 142
APPENDIX B 7188XW.EXE ........................................................................................... 143
APPENDIX C FIRMWARE VERSION INFORMATION ............................................. 148
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Chapter 1
Introduction
Nowadays, a great number of RS-232 devices for both automation
and information transfer are being used in industrial applications, and
linking these devices is very important in the modern situation. The
devices are usually located at a distance from the Host PC, meaning
that linking via multiple serial cards is inefficient. ICPDAS I-752N
series products have been developed to provide an effective link
between multiple RS-232 devices via a single RS-485 network. This
network protocol offers stability, reliability and simple cabling while
delivering a low–cost, easy-to-maintain product.
1.1. Overview
Addressable RS-232 Converter
Most RS-232 devices don’t support individual device addressing. To
overcome this limitation, ICPDAS I-752N series modules assign a
unique address to any RS-232 device installed on an RS-485 network.
When the Host PC sends a command to the RS-485 network a device
address can be attached to the command. The destination I-752N
module will then remove the address field and pass the remaining
commands to the destination RS-232 device. Responses from the
local RS-232 devices will be returned to the Host PC via the I-752N
module.
Responses from RS-232 devices can be addressable
ICPADS I-752N series modules can prefix a response from an RS-232
device with a unique address and then pass the response to the
RS-485 network. The Host PC can then identify which RS-232 device
the response comes from.
Master-type Addressable RS-232 Converter
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ICPDAS I-752N products are unique. In that they are Master-type
converters, while most other converters are Slave-type, which are
helpless without a Host PC. In real industrial applications, many users
are not satisfied with Slave-type converters as they cannot be adapted
to individual requirement. The powerful I-752N series analyzes the DI /
DO of local RS-232 devices without the need for a Host PC. Refer to
Applications 7~9 in Sec.6.2 for more information.
Onboard 1Kb Queue buffer
I-752N series modules are equipped while a 1Kb queue buffer for its
local RS-232 device. All input data can be stored in the queue buffer
until the Host PC has time to read it. These features allow the Host PC
to be linked to thousands of RS-232 devices without any loss of data.
(Refer to Sec.5.3.30)
Onboard DI signal trigger
I-752N series modules are equipped with 1/2/5 DI channels for sensor
interfacing. These DI channels are linked to a photo sensor/switch to
act as a signal. They also can be used as general purpose DI. I-752N
series modules provide ODM and applicatin demos for a user to
modify them to read and analyze these DI signals without the need for
a Host PC.
Onboard DO channels for emergency control
I-752N series modules equipped with 1/3/5 DO channels for
emergency control. The DO channels can directly drive either relay or
an LED, and can be used to control the local devices in the event of an
emergency. I-752N series modules provide ODM and applicatin
demos for a user to modify them to control these DO channels without
the need for a Host PC.
3000V isolation on the RS-485 side
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COM2 of the I-7521/I-7522/I-7523 modules is an isolated RS-485 port
with 3000V isolation, which will protect the local RS-232 devices from
transient noises coming from the RS-485 network.
Self-Tuner ASIC inside
The interned I-752N Self-Tuner ASIC for the RS-485 port can auto
detect and control the send/receive direction of the RS-485 network,
meaning that there is no need for application programs to be
concerned about direction control of the RS-485 network.
A Wide range available for selection
RS-232
RS-485
RS-232/ RS-422/
RS-485 RS-485
DI
DO
I-7521(D)
I-7522(D)
I-7523(D)
I-7522A(D)
I-7524(D)
I-7527(D)
1
1
2
3
1
1
1
2
1
2
1
1
1
0
1
1
1
5
5
3
1
1
1
1
6
1
1
1
1
Note: I-752N means any one of seven kinds of modules above.
Order Information
 Order item choice
Order item Module name
I-7521(D)
Intelligent communication controller
(1 channel of RS-232)
I-7522(D)
Intelligent communication controller
(2 channel of RS-232)
I-7523(D)
Intelligent communication controller
(3 channel of RS-232 )
I-7522A(D) Intelligent communication controller
(1 channel of RS-232 and 1 channel
Of RS-422/485)
I-7524(D)
Intelligent communication controller
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MiniOS7
MiniOS7
MiniOS7
MiniOS7
MiniOS7
6
I-7527(D)
I-7XXX
I-7XXXD
(4 channel of RS-232)
Intelligent communication controller
(7 channel of RS-232)
I-7XXX without 7-SEG display
I-7XXX with 7-SEG display
MiniOS7
MiniOS7
MiniOS7
 Package List
The package includes the following item:
 One I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527 User’s
Manual (this manual)
 One release note(Depend on situation)
 One software utility disk or CD
 One download cable  CA0910F for I-7521, I-7522, I-7523
 CA0910 for I-7522A, I-7524, I-7527
Note:
If any of these items are missing or damaged, contact the local
distributors for more information. Save the shipping materials
and cartons in case you want to ship in the future.
Release Note (Important):
It is recommended to read the release note first. All important
information will be given in release note as follows:
 Influential modification about software or hardware
 The path that points to I-752N document and software
changes in the companion CD
 others……….
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1.2. Features
General












Built-in “Addressable RS-232 Converter” firmware
Supports Dual-Watchdog commands
Supports Power-up value & safe value for DO
The firmware code is open source and well documented
Source code could be modified depending on according specific
user requirements.
The firmware can monitor the onboard DI and control the onboard
DO in real-time depending on user requirements
The firmware can monitor the RS-232 device and control the
onboard DO in real-time according to user’s requirements
Watchdog timer provides fault tolerance and recovery
Low power consumption
R.O.C. Invention Patent No. 086674
R.O.C. Invention Patent No. 103060
R.O.C. Patent No. 132457
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1.3. Dimensions
For I-7521(D)/I-7522(D)/I-7523(D)
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For I-7522A(D)/I-7524(D)/I-7527(D)
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1.4. Pin Assignment
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Pin assignment of 13-pin screw terminal block(I-7521/I-7521D):
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Name
X3
X2
X1
DO3
DO2
DO1
DI3
DI2
INIT*
D2+
D2+VS
13
GND
Description
Connects to I/O expansion board
Connects to I/O expansion board
Connects to I/O expansion board
Digital output, 150mA, 30V
Digital output, 150mA, 30V
Digital output, 150mA, 30V
Digital input, 3.5V ~ 30V
Digital input, 3.5V ~ 30V
Initial pin, 3.5V ~ 30V
DATA+ pin of COM2 (RS-485)
DATA- pin of COM2 (RS-485)
V+ of power supply (+10 to +30VDC
unregulated)
GND of power supply
Pin assignment of COM1 connector (DB-9 Male):
Pin
1
2
Name Description
Data+ DATA+ of RS-485 port
TXD Transmits Data (RS-232)
3
RXD
Receives Data (RS-232)
4
5
6
7
8
9
N/C
GND
N/C
CTS
RTS
Data-
No Connection
Signal ground of RS-232
No Connection
Clear To Send (RS-232)
Request To Send (RS-232)
DATA- of RS-485 port
Note: The COM1 can be used as s RS-232 port or s RS-485 port. It
is not recommended to use both RS-232 & RS-485 at the same
time.
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Pin assignment of 13-pin screw terminal block(I-7522/I-7522D):
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Name
CTS3
RTS3
RXD3
TXD3
GND
DO1
DI3
DI2
INIT*
D2+
D2+VS
13
GND
Description
Clear To Send of COM3 (RS-232)
Request To Send of COM3 (RS-232)
Receives Data of COM3 (RS-232)
Transmits Data of COM3 (RS-232)
Signal ground of COM3 & COM4
Digital output, 150mA, 30V
Digital input, 3.5V ~ 30V
Digital input, 3.5V ~ 30V
Initial pin, 3.5V ~ 30V
DATA+ pin of COM2 (RS-485)
DATA- pin of COM2 (RS-485)
V+ of power supply (+10 to +30VDC
unregulated)
GND of power supply
Pin assignment of COM1 connector (DB-9 Male):
Pin Name Description
1
Data+ DATA+ of RS-485 port
2
TXD Transmits Data (RS-232)
3
RXD
Receives Data (RS-232)
4
5
6
7
8
9
N/C
GND
N/C
CTS
RTS
Data-
No Connection
Signal ground of RS-232
No Connection
Clear To Send (RS-232)
Request To Send (RS-232)
DATA- of RS-485 port
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It
is not recommended to use both RS-232 & RS-485 at the same
time.
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Pin assignment of bottom 14-pin screw terminal block (I-7522A
/I7522AD):
Pin Name Description
1
DO
100 mA, 30V max. DO1
2
DI
3.5V ~ 30V,DI1
3
D1+
DATA+ pin of COM1 (RS-485)
4
D1DATA - pin of COM1 (RS-485)
5
CTS1 Clear To Send of COM1 (RS-232)
6
RTS1 Request To Send of COM1 (RS-232)
7
GND Signal ground of RS-232
8
TXD1 Transmits Data of COM1 (RS-232)
9
RXD1 Receives Data of COM1 (RS-232)
10 INIT* Initial pin, 3.5V ~ 30V
11 D2+
DATA+ pin of COM2 (RS-485)
12 D2DATA - pin of COM2 (RS-485)
13 +VS
V+ of power supply (+10 to +30VDC unregulated)
14 GND GND of power supply
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It is
not recommended to use both RS-232 and RS-485 at the same time.
Pin assignment of top 14-pin screw terminal block:
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TXD3+
TXD3RXD3+
RXD3DI0
DI1
DI2
DI3
GND
PWR
DO0
DO1
DO2
DO3
TXD+ pin of COM3 (RS-422/RS-485)
TXD - pin of COM3 (RS-422/RS-485)
RXD+ pin of COM3 (RS-422)
RXD - pin of COM3 (RS-422)
Digital Input, 3.5V ~ 30V, DI2
Digital Input, 3.5V ~ 30V, DI3
Digital Input, 3.5V ~ 30V, DI4
Digital Input, 3.5V ~ 30V, DI5
GND of Digital Output
Power of Digital Output
Digital Output, 100 mA, 30V max., DO2
Digital Output, 100 mA, 30V max., DO3
Digital Output, 100 mA, 30V max., DO4
Digital Output, 100 mA, 30V max., DO5
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Pin assignment of 13-pin screw terminal block(I-7523/I-7523D):
Pin
1
2
3
4
5
6
7
8
9
10
11
12
Name
CTS3
RTS3
RXD3
TXD3
GND
TXD4
RXD4
DI2
INIT*
D2+
D2+VS
13
GND
Description
Clear To Send of COM3 (RS-232)
Request To Send of COM3 (RS-232)
Receives Data of COM3 (RS-232)
Transmits Data of COM3 (RS-232)
Signal ground of COM3 & COM4
Transmits Data of COM4 (RS-232)
Receives Data of COM4 (RS-232)
Digital input, 3.5V ~ 30V
Initial pin, 3.5V ~ 30V
DATA+ pin of COM2 (RS-485)
DATA- pin of COM2 (RS-485)
V+ of power supply (+10 to +30VDC
unregulated)
GND of power supply
Pin assignment of COM1 connector (DB-9 Male):
Pin Name Description
1
Data+ DATA+ of RS-485 port
2
TXD Transmits Data (RS-232)
3
RXD
Receives Data (RS-232)
4
5
6
7
8
9
N/C
GND
N/C
CTS
RTS
Data-
No Connection
Signal ground of RS-232
No Connection
Clear To Send (RS-232)
Request To Send (RS-232)
DATA- of RS-485 port
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It
is not recommended to use both RS-232 and RS-485 at the same
time.
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Pin assignment of bottom 14-pin screw terminal block (I-7524/
I-7524D):
Pin Name Description
1
DO
100 mA, 30V max.
2
DI
3.5V ~ 30V
3
D1+
DATA+ pin of COM1 (RS-485)
4
D1DATA - pin of COM1 (RS-485)
5
CTS1 Clear To Send of COM1 (RS-232)
6
RTS1 Request To Send of COM1 (RS-232)
7
GND Signal ground of RS-232
8
TXD1 Transmits Data of COM1 (RS-232)
9
RXD1 Receives Data of COM1 (RS-232)
10 INIT* Initial pin, 3.5V ~ 30V
11 D2+
DATA+ pin of COM2 (RS-485)
12 D2DATA - pin of COM2 (RS-485)
13 +VS
V+ of power supply (+10 to +30VDC unregulated)
14 GND GND of power supply
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It is
not recommended to use both RS-232 & RS-485 at the same time.
Pin assignment of top 14-pin screw terminal block:
15
16
17
18
19
20
21
22
23
24
25
26
27
28
CTS3
RTS3
TXD3
RXD3
GND
CTS4
RTS4
TXD4
RXD4
GND
CTS5
RTS5
TXD5
RXD5
CTS pin of COM3 (RS-232)
RTS pin of COM3 (RS-232)
TXD pin of COM3 (RS-232)
RXD pin of COM3 (RS-232)
GND pin of COM3/COM4 (RS-232)
CTS pin of COM4 (RS-232)
RTS pin of COM4 (RS-232)
TXD pin of COM4 (RS-232)
RXD pin of COM4 (RS-232)
GND pin of COM4/5 (RS-232)
CTS pin of COM5 (RS-232)
RTS pin of COM5 (RS-232)
TXD pin of COM5 (RS-232)
RXD pin of COM5 (RS-232)
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Pin assignment of bottom 14-pin screw terminal block:
Pin Name Description
1
DO
100 mA, 30V max.
2
DI
3.5V ~ 30V
3
D1+
DATA+ pin of COM1 (RS-485)
4
D1DATA - pin of COM1 (RS-485)
5
CTS1 Clear To Send of COM1 (RS-232)
6
RTS1 Request To Send of COM1 (RS-232)
7
GND Signal ground of RS-232
8
TXD1 Transmits Data of COM1 (RS-232)
9
RXD1 Receives Data of COM1 (RS-232)
10 INIT* Initial pin, 3.5V ~ 30V
11 D2+
DATA+ pin of COM2 (RS-485)
12 D2DATA - pin of COM2 (RS-485)
13 +VS
V+ of power supply (+10 to +30VDC unregulated)
14 GND GND of power supply
Note: The COM1 can be used as a RS-232 port or a RS-485 port. It is
not recommended to use both RS-232 & RS-485 at the same time.
Pin assignment of top 14-pin screw terminal block:
15
16
17
18
19
20
21
22
23
24
25
26
27
28
RXD3
TXD3
RXD4
TXD4
GND
RXD5
TXD5
RXD6
TXD6
GND
RXD7
TXD7
RXD8
TXD8
RXD pin of COM3 (RS-232)
TXD pin of COM3 (RS-232)
RXD pin of COM4 (RS-232)
TXD pin of COM4 (RS-232)
GND pin of COM3/4/5/6 (RS-232)
RXD pin of COM5 (RS-232)
TXD pin of COM5 (RS-232)
RXD pin of COM6 (RS-232)
TXD pin of COM6 (RS-232)
GND pin of COM5/6/7/8 (RS-232)
RXD pin of COM7 (RS-232)
TXD pin of COM7 (RS-232)
RXD pin of COM8 (RS-232)
TXD pin of COM8 (RS-232)
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1.5. Specifications
Operating environment
Operating Temperature
Storage Temperature
Humidity
Built-in Watch Dog Timer
-25°C to +75°C
-40°C to +80°C
5 to 90%
1.6. seconds for MiniOS7 1.0
0.8 seconds for MiniOS7 2.0
Built-in power protection & network protection circuit
COM port
Program download port
RS-485 port with self-tuner
inside, 3000V isolation
RS-485 port with self-tuner
inside
COM1
For I-7521(D)/I-7522(D)/I-7523(D)
For I-7522A(D)/I-7524(D)
/I-7527(D)
Communication speed
All ports
115200 bps max
Digital Input speed
Digital Input
Digital Output
Input type: non-isolated
On voltage level: +1V max (Connect
to GND)
Off voltage level: +3.5V~30V (Open)
Output type: Open-collector
Output current: 100mA
Max load voltage: +30V/DC
Dimensions
I-7521(D)/I-7522(D)/I-7523(D)
I-7522A(D)/I-7524(D)
/I-7527(D)
119 x 72 x 33 mm
123 x 72 x 33 mm
Power
Protection
Power requirement
Power consumption
Power reverse polarity protection
10 to 30 V/DC(non-regulated)
2W (without display)
3W (with display)
For ODM User
 SRAM can be 512K max.
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 COM2 can be 3000V isolated
 EEPROM can be 32K bytes
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1.6. Wiring Diagrams for Application
1.6.1.
Program download
RS-232
Host PC
I-7521/I-7522/I-7522A/I-7523A
I-7523/I-7524/I-7527
I-7521/I-7521D
I-7522/I-7522D GND
I-7523/I-7523D +VS
Host PC
6
7
8
9
1
RS-232
Signal
5
4
2
3
3
2
4
1
9
13
Ext. GND
12
Ext. 24V
D2-
11
D2+
10
9
INIT*
8
7
Connect INIT* pin with
COM1
GND pin to disable
6
autoexec.bat
5
Download
Male 9-pin D-sub Cable:CA0910F
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
Connect INIT* pin with GND pin
to disable autoexec.bat
Host PC
6
7
8
9
1
I-7522A/I-7522AD GND
I-7523A/I-7523AD +VS
I-7524/I-7524D
D2I-7527/I-7527D
14
Ext. GND
13
Ext. 24V
D2+
11
INIT*
10
RXD1
9
COM1 TXD1
8
RS-232
Signal
2
GND
12
RX
TX
GND
7
3
4
5
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
Download
Cable:CA0910
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1.6.2.
Using a 3-wire RS-232 port
I-7521/I-7521D
I-7522/I-7522D
I-7523/I-7523D
I-7522A/I-7522AD
RXD
I-7524/I-7524D
I-7527/I-7527D
TXD
GND
RS-232 Device
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
There are 3 wires as following:
 Connect RXD to TXD of RS-232 device
 Connect TXD to RXD of RS-232 device
 Connect GND to GND of RS-232 device
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1.6.3.
Using a 5-wire RS-232 port
I-7521/I-7521D
I-7522/I-7522D
I-7523/I-7523D
I-7522A/I-7522AD
I-7524/I-7524D
I-7527/I-7527D
RXD
TXD
GND
RTS
CTS
RS-232 Device
RI
CTS
RTS
DSR
GND
DTR
TXD
RXD
DCD
There are 5 wires as follows:
 Connect RXD to TXD of RS-232 device
 Connect TXD to RXD of RS-232 device
 Connect RTS to CTS of RS-232 device
 Connect CTS to RTS of RS-232 device
 Connect GND to GND of RS-232 device
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1.6.4.
Using a RS-485 port
I-7521/I-7521D
I-7522/I-7522D
I-7523/I-7523D
I-7522A/I-7522AD
I-7524/I-7524D
I-7527/I-7527D
7000 module
GND
14
Ext. GND
+VS
13
Ext. 24V
D2-
12
D2+
11
GND
10
Ext. GND
+VS
9
Ext. 24V
D2-
8
D2+
7
Note:
 The RS-485 interface can directly drive 256 sets of 7000 modules
without a repeater
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1.6.5.
Using DI/DO of I-7521(D)
(valid for I-7521(D)/I-7522(D)/I-7523(D))
I-7521
GND
13
Ext. GND
+VS
12
Ext. 24V
1
Data+
D2-
11
2
TXD
D2+
10
3
RXD
INIT*
9
4
N/C
DI2
8
5
GND
DI3
7
6
N/C
DO1
6
7
CTS
DO2
5
8
RTS
DO3
4
Data-
X1
3
X2
2
X3
1
9
COM1
Inductive load or
Conductive load
Dry contact or TTL/CMOS
or (3.5V to 30V D/I)
Current Limit Resistor
Load current <= 125mA
+5V
D/I Block Diagram
R2
10K
UA
R1
2
D/I
3
TO_CPU
1
10K
74HCT08
7521
D/O Block Diagram
U?
DIO24
DIO29
DIO30
1
2
3
4
5
6
7
8
B0
B1
B2
B3
B4
B5
B6
E
COM
C0
C1
C2
C3
C4
C5
C6
9
16
15
14
13
12
11
10
12
+VS
6
DO1
5
DO2
4
DO3
13
GND
2003A
7521
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1.6.6.
Using DI/DO of I-7522A(D)
(valid for I-7522A(D)/I-7524(D)
/I-7527(D))
I-7522A
14
15
TXD3+
+VS
13
16
TXD3 -
D2-
12
17
RXD3+
D2+
11
18
RXD3 -
INIT*
10
19
DI0
RXD1
9
20
DI1
TXD1
8
21
DI2
GND
7
22
DI3
RTS1
6
23
GND
CTS1
5
Ext. GND
24
PWR
D1 -
4
Ext. 24V
25
DO0
DI+
3
26
DO1
DI
2
270
DO2
DO
1
28
DO3
Dry contact or TTL/CMOS
or (3.5V to 30V D/I)
Inductive load or
Conductive load
GND
Current Limit Resistor
Load current <= 125mA
X507
+5V
D/I Block Diagram
R2
10K
UA
R1
2
D/I
3
TO_CPU
1
10K
19~22
74HCT08
7522A
+5V
D/O Block U
Diagram
1
TO_CPU
1
2
3
4
5
6
7
8
UA
B0 3
B1
B2
B3
B4
B5
B6
E
C OM
2
C0
C11
C2
C3
74HCT08
C4
C 7522A
5
C6
R2
10K
9
16
15
14
13
12
11
10
R1
24
25
D/I
10K
U LN 2003A
SOI C 16
PW R
D O0
D O1
D O2
D O3
27
26
28
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1.6.7.
Using a RS-485 of I-7522A(D)
I-7522A
7000 module
TXD3+ 15
TXD3- 16
GND
Vs+
10
9
D2D2+
8
7
Ext.GND
Ext.24V
Note:
 The RS-485 interface can directly drive 256 sets of 7000 modules
without a repeater
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1.7. Comparison Table
Comparison Table of I-7521(D),I-7522(D),I-7523(D)
I-7521(D)
I-7522(D)
I-7523(D)
CPU clock
80188 or compatible, 80188 or compatible, 80188 or compatible,
20M Hz
20M Hz
20M Hz
SRAM
128K
128K
128K
Flash ROM
512K
512K
512K
COM1
RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
COM2
RS-485 with
self-tuner inside,
3000V isolation
RS-485 with
self-tuner inside,
3000V isolation
RS-485 wtih
self-tuner inside,
3000V isolation
COM3
No Com3
RS-232
(txd,rxd,rts,cts)
RS-232
(txd,rxd,rts,cts)
COM4
No Com4
No Com4
RS-232
Transmission
Up to 115.2 kbps
Up to 115.2 kbps
Up to 115.2 kbps
RTC
No
No
No
EEPROM
2K bytes
2K bytes
2K bytes
D/I(3.5V~30V)
2 channels
2 channels
1 channels
D/O(100mA)
3 channels
1 channel
0
Operation system
MiniOS7
MiniOS7
MiniOS7
Program download
COM1
COM1
COM1
(txd,rxd)
Speed
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Comparison Table of I-7522A(D),I-7524(D),I-7527(D)
I-7522A(D)
I-7524(D)
I-7527(D)
CPU clock
80188, or compatible 80188, or compatible 80188, or compatible
40M Hz
40M Hz
40M Hz
SRAM
256K
256K
256K
Flash ROM
512K
512K
512K
COM1
RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
RS-232
or RS-485 with
self-tuner inside
COM2
RS-485 with
self-tuner
RS-485 with
self-tuner inside
RS-485 wtih
self-tuner inside
RS-232
(txd,rxd,rts,cts)
RS-232(txd,rxd)
inside
COM3
RS-422/RS-485
(txd3-,rxd3+ ,
txd3+,rxd3-)
COM4
No Com4
RS-232
(txd,rxd,rts,cts)
RS-232(txd,rxd)
COM5
No Com5
RS-232
(txd,rxd,rts,cts)
RS-232(txd,rxd)
COM6
No Com6
No Com6
RS-232(txd,rxd)
COM7
No Com7
No Com7
RS-232(txd,rxd)
COM8
No Com8
No Com8
RS-232(txd,rxd)
Transmission
Speed
Up to 115.2 kbps
Up to 115.2 kbps
Up to 115.2 kbps
RTC
Yes
Yes
Yes
EEPROM
2K bytes
2K bytes
2K bytes
D/I(3.5V~30V)
5 channels
1 channel
1 channel
D/O(100mA)
5 channels
1 channel
1 channel
Operation
system
MiniOS7
MiniOS7
MiniOS7
Program
download
COM1
COM1
COM1
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Chapter 2
Operating Principles
2.1 INIT* pin operating principles
The INIT* pin has two functions:
1) If provides help for downloading program. (Refer to Sec. 3.4. for
details)
2) If retrieves configuration data stored in EEPROM.
If the configuration data for the I-752N series module is forgotten,
resulting in a communication failure, the procedure for retrieving the
configuration data stored in the EEPROM is as follows (Applicable to
firmware version number 3.0 and above):
Step 1: Refer to Sec. 1.6.1 and steps 2 to 9 in Sec. 3.1 to set the
configuration parameters to 115200, N, 8, 1. After pressing “Enter”,
either “i7188XC>” or “i7188xB>” will be displayed on the screen.
Step 2: Type the “dir” command, then press “Enter.” The following
screen will be displayed:
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NOTE: the text shown in the ellipse region is “i7188XC>” and will be
displayed for I-7521/I-7522 /I-7523 modules, but “i-7188XB>” will be
displayed for I-7522A/I-7524/I-7527 modules.
Step 3: Type “752n_c” (for I-7521/I-7522/I-7523) or “752n_b” (for
I-7522A/I-7524/ I-7527) and press the Enter key to execute the
752n_c.exe or 752n_b.exe file (Note: the INIT* pin should be
connected to the GND pin). The I-752N module will revert to the
factory default settings without changing the EEPROM data. The
factory default settings are as follows:
COM Port
=2
Module Address = 00
Baud Rate
= 9600
Checksum
= DISABLED
CrLfmode
= 0 (0x0D)
Data format = 1 start bit + 8 data bits + 1 stop bit (N, 8, 1)
Type 752n_c+Enter and then the
windows 7188xw can be closed.
Step 4: Refer to Sec. 3.1 and send commands to COM2 to read the
configuration for COM 2 or other ports. Some examples are as
follows:
(a) Send the command string $00M[0x0D] to retrieve the module
name and record it
(b) Send the command string $00A[0x0D] to retrieve the module
address and record it
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(c) Send the command string $00B0[0x0D] to retrieve the Baud Rate
for COM2 and record it
(d) Send the command string $00T0[0x0D] to retrieve the CrLfmode
for COM2 and record it
Step5: Power off the module and disconnect the INIT* and GND pins
Step6: Power on the module and communicate with the I-752N
module using the same status settings as those you previously
recorded.
If the INIT* and GND pins are disconnected, the module will execute
752n_c.exe or 752n_b.exe and the autoexec.bat files, and then the
module will auto configure itself based on the configuration data
stored in the EEPROM.
2.2 Demo Code, Firmware and 7188xw.exe
To locate the demo code, firmware and the 7188xw.exe file:
 Insert the installation CD and wait for the auto run function to
activate (or run auto32.exe)
 Click “Toolkits (Software)/Manuals”
 Click “7521/2/3A/2A/3/4/7 Series”
 Click “Demo Program”. Several ODM programs and demo codes for
I-752N modules will be displayed. The code can be modified for
individual applications. All code is well-documented, so the code
can be easily changed.
Location:
Companion CD: napdos/752n/source_code/
or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/752n/source_code/
 Click “View 752n Firmware” and the firmware can be obtained:
Location:
Companion CD: Napdos\752N\Firmware_V3
Or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/752n/firmware_v3
NOTE: There are two files, autoexec.bat and 752n_c.exe/
752n_b.exe, stored in the flash ROM of each I-752N module. The
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752n_c.exe/752n_b.exe file will be executed once the power is
supplied to the module and the INIT* pin is floating.



The readme.txt file recording upgrade or modification information
related to the firmware in the firmware_v3 folder.
Click “BACK”
Click “MiniOS7”
Double click “utility,” and 7188XW.exe can be obtained.The icon for
7188xw.exe is as below:
Location:
Companion CD: Napdos\MiniOS7\utility
or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/minios7/utility/
2.3 The RS-485 Port and Self-Turner ASIC
The 2-wire RS-485 port is half-duplex. Send/receive directional control
in a 2-wire RS-485 network is very important. Therefore, each I-752N
module is equipped with a Self-Tuner ASIC controller for all RS-485
ports. The Self-Tuner ASIC controller will automatically detect and
control the send/receive direction of the RS-485 network. First and
foremost, the application program does not have to make allowance
for the send/receive direction control of the RS-485 network.
2.4 7-Segment LED Display
The red LED of the I-752N series can be turned ON or OFF using
software. The 5 digits of the 7-segment LED are also programmable.
The 5-digit LED is very useful in real world applications, and can
be used to replace the monitor and touch-screen for many applications.
The 5 digits of the 7-segment LED will show the address, Baud Rate
and CrLfmode for each COM port in turns when the I-752n firmware is
executed.
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2.5 752N protocol description
[Address]
There is a initial address for I-752N series module.
For example: (assume initial address is 01, CrLfmode is 4, data format=9600, N,
8, 1 for COM2 of a I-7522A module)
command
response
$01A
!01 ----> the initial address is 01
$02A
!01 ----> the initial address is 01
$03A
?01 ----> an invalid command
$01A05
$06A
!01 ----> changes the initial address to 05, so COM1 is
now 05 and COM3 is now 06
!05 ----> the initial address is 05
[CrLfmode]
There are five modes for I-752N when receiving commands (COM2) and
receiving responses (COM1, 3~8).
We call this mode "CrLfmode". The default CrLfmode is 4 for all COM ports.
Note: More information about the CrLfmode command can be found in Sec.
5.3.12.
a: CrLfmode=0/1/2/3
In these modes, the I-752N module judges when the command/response
string ends based on the end character of the command/response string.
For example: (initial address is 01, I-7522A)
Assume CrLfmode=0 for COM2,
COM2 determines the end of a command string when it encounters the 0x0D
(CR) character. When manually entering individual command characters using
a PC terminal application, the 0x0D (CR) character must be sent as the final
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character of the command string. If this character is not sent, COM2 will
continue to receive command characters and consider them as part of the
command string, resulting in an error.
For more information about RS-232 COM ports, refer to the Notes in Sec.
5.3.33.
b: CrLfmode=4
The factory default value for CrLfmode is 4 for all COM ports. In this mode, the
I-752N module determines the end of a command string once no characters
are received for a specified timeout interval.
For example:
PC
Command
I-752N
Assume the timeout interval is 10 ms.
Command string: ":01T"
If you type the first character ':', then type the second character,'0', after 5 ms,
type the third character ,'1', after 1 second and type the fourth character ,'T',
after 3 ms
Two command string will be received by COM2, which will be ":0" and "1T",
not ":01T". So the command received is not the same as the original
command.
The timeout interval is so small that it is impossible to manually enter
individual command characters. In this situation, the command string must be
sent at one time using software. The interval between transmission of the
characters can be very small if the command string is sent using software.
c: Set the corresponding CrLfmode for all COM ports depending on the
command and response.
For example:
PC
I-7522A
COM2 of I-7522A
Device
COM1of I-7522A
Command: ":01ABCD<CR>" sent by PC
Device response: "EFGH<CR>," when the command is "ABCD<CR>"
Situation 1:
I-7522A, COM2 CrLfmode=0, COM1 CrLfmode=4
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The data received by COM2 is "ABCD" where CrLfmode=0 (the <CR>
character is removed) and "ABCD" is sent to COM1 where CrLfmode=4
(nothing adding). So the device receives the string "ABCD", not "ABCD<CR>",
and doesn't give any response.
Command transformation:
":01ABCD<CR>",PC-->"ABCD",com2-->"ABCD",com1-->"ABCD", device
Situation 2:
I-7522A, COM2 CrLfmode=0, COM1 CrLfmode=0
The data received by COM2 is "ABCD" where CrLfmode=0 (the <CR>
character is removed) and "ABCD<CR>" is sent to COM1 where CrLfmode=0
(the <CR> character is removed). So the device receives the string
"ABCD<CR>", and gives the response "EFGH<CR>".
The data received by COM1 is "EFGH" where CrLfmode=0 (the <CR>
character is removed and "EFGH<CR>" is sent to COM2 where CrLfmode=0
(the <CR> character is added). So the PC receives the string "EFGH<CR>".
Command transformation:
":01ABCD<CR>",PC -->"ABCD",com2 -->"ABCD<CR>",com1 -->
"ABCD<CR>", device
Response transformation:
"EFGH<CR>",device -->"EFGH",com1 -->"EFGH<CR>",com2 -->
"EFGH<CR>",PC
Situation 3:
I-7522A, COM2 CrLfmode=4, COM1 CrLfmode=4
The data received for COM2 is "ABCD<CR>" where CrLfmode=4 (nothing
added) and "ABCD<CR>" is sent to COM1 where CrLfmode=4 (nothing
added). So the device receives the string "ABCD<CR>", and gives
the response "EFGH<CR>".
The data received for COM1 is "EFGH<CR>" where CrLfmode=4 (nothing
added) and "EFGH<CR>" is sent for COM2 where CrLfmode=4 (nothing
added). So the PC receives the string "EFGH<CR>".
Command transformation:
":01ABCD<CR>",PC -->"ABCD<CR>",com2 -->"ABCD<CR>",com1 -->
"ABCD<CR>", device
Response transformation:
"EFGH<CR>",device --> "EFGH<CR>",com1 -->"EFGH<CR>",com2
--> "EFGH<CR>",PC
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[Timeout]
The $AAJN[timeout] command is only supported by firmware version 3.0 and
above.
If the length of a command or response string is too long, or the data
transmission time between the I-752N and peripheral RS-485 devices/RS-232
device is too long, the timeout value can be adjusted to ensure the amount of full
data is received.
If the timeout value for the RS-232 COM Port is too small, the response part will
be received by the 1K byte Queue buffer for RS-232 Ports.
The $AAU command can be used to read the buffer.
Note: More information about the timeout command can be found in Sec.
5.3.33.
[Summary]
COM Ports receive data based CrLfmode rules.
Each port has its own data format, timeout values and CrLfmode. Setting correct
parameters will ensure that the COM Ports work well and efficiently.
[Command and Response Flow Chart]
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1. Each RS-232 COM Port has its own CrLfmode, timeout1,
timeout2. (RS-485 COM2 only has CrLfmode, timeout0)
2. Command:
Response:
COM2
I-752N
crlfmode=4 (default)
COM 2:
CrLfmode=0~3 suffix the
end character to the response.
CrLfmode=4 do not suffix
any characters to the response.
crlfmode=0~3
No
Receive an
end-character to finish
the receiving operation?
(remove the
end-character from the
command)
Wait for timeout0 to
elapse without
receiving any further
data in order to
determine the end of
the command?
Stop receiving and start to send
response characters to COM2.
command bypass status: OFF
Yes
Yes
Yes
Bypass or not?
(delimiter)AA(bypa
ss), see Sec. 5.3.10
Yes
RS-232 COM Port:
1. CrLfmode=0~3
suffix end character to
the command.
CrLfmode=4 do not
suffix any character to
the command.
2. “command bypass
status”: ON.
time>timeout2? and
timeout1 has elapsed?
time: between
receiving a new
character and receiving
the last character.
No
No
No
Receive one character as
part of a response.
Yes
time < timeout2?
time: between receiving a
Yes new character and
receiving the last
character
end-character Received?
Receive a character as
part of a response.
(remove the end
character from the
response)
The response is stored
in the RS-232 COM
Port buffer (Refer to
command “$AAU”)
crlfmode=0~3
crlfmode=4(default)
Yes
No
OFF
“command bypass status”
ON or OFF?
Response time< timeout1?
ON
3
RS-232 COM Ports
RS-232 device
Ensure that the command arrives in position “3”.
Response time: The period of
time between when the RS-232
device receives a command and
sends a response.
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2.6 Writing Program on 752N
Module
I-7521/I-7522/I-7523
I-7522A/I-7524
/I-7527
Manual Location
http://www.icpdas.com/products/PAC/i-7188_7186/i-7188xc.htm --->
Click “Manual” ---> Download 7188xc_manual_english.pdf
http://www.icpdas.com/products/PAC/i-7188_7186/i-7188xb.htm --->
Click “Manual” ---> Download 7188xb_manual_english.pdf
7188xc_manual_english.pdf and 7188xb_manual_english.pdf will teach how to
programming. User can write a program and execute it on I-752N hardware.
Here I-752N is as an embedded controller.
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Chapter 3
Quick Start
Factory default setting values about configurations for each COM port
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
Baud Rate 9600 bps 9600 bps 9600 bps 9600 bps 9600 bps 9600 bps 9600 bps 9600 bps
Data bit
8
8
8
8
8
8
8
8
Parity bit
None
None
None
None
None
None
None
None
Stop bit
1
1
1
1
1
1
1
1
Checksum
No
No
No
No
No
No
No
No
CrLfmode
4
4
4
4
4
4
4
4
delimiter
(Refer to
:
:
:
:
:
:
:
:
Sec 5.3.10)
WatchDog disable disable disable disable disable disable disable disable
Prefixed
disable
disable disable disable disable disable disable
address
(Refer to
Sec.5.3.38)
Bypass to disable
disable disable disable disable disable disable
COM2
(Refer to
Sec.5.3.39)
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3.1 Connecting the I-752N module
Step 1: Connect the I-752N module to the RS-485 network as follows:
I-7520
RS-232
RS-485
Host PC
I-7521/22/22A/23A/23/24/27
I-7520
I-7520R
Host-PC
6
7
8
9
RS-232
Signal
1
3
3
4
4
10
+VS
9
8
1
2
2
GND
5
7
6
6
7
5
8
4
9
5
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
3
Data-
2
Data+
1
Female 9-pin D-sub
I-7521/I-7521D
I-7522/I-7522D
I-7523/I-7523D
COM2
5
4
3
2
1
GND
13
Ext. GND
+VS
12
Ext. 24V
D2-
11
D2+
10
9
8
RS-485
Signal
COM1
7
6
Male 9-pin D-sub
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I-7520
I-7520R
Host-PC
6
7
8
9
1
RS-232
Signal
3
3
4
4
5
5
Male 9-pin D-sub
Female 9-pin D-sub
10
+VS
9
8
1
2
2
GND
7
6
6
7
5
8
4
9
3
Data-
2
Data+
1
COM 1/2/3/4 or
UART port
COM2
COM1
GND
14
Ext. GND
+VS
13
Ext. 24V
D2-
12
D2+
11
INIT*
10
RXD1
9
TXD1
8
I-7523A/I-7523AD GND
I-7522A/I-7522AD
I-7524/I-7524D
I-7527/I-7527D
RS-485
Signal
7
Step 2: Install the MiniOS7 Utility. Refer to Appendix A MiniOS7 Utility for more
details.
Step 3: From the Windows START menu, go to the Programs/ICPDAS/MiniOS7
Utility Ver 3.11 folder and locate the MiniOS7 Utility Ver 3.11.
Step 4: Execute 7188xw.exe on the Host PC.
2
1
Choose “7188XW” and press Enter
Click the “Tools” icon
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3
When this dialog appears,
just click “OK”
Step 5: Select the active COM port for the Host PC.
If the I-752N is connected to COM1 on the PC, then press ALT + 1
If the I-752N is connected to COM2 on the PC, then press ALT + 2
The following screen will be shown:
See note
** below
**: Illustrates a real time configuration for the 7188xw. If the configuration is not
9600, N, 8, 1, refer to Steps 6 to 9 below to make the correct settings.
Otherwise, go directly to Step 10.
Step 6: Set the Baud Rate of the 7188xw to 9600.
Press ALT + C
Type b9600
Press ENTER to confirm
Step 7: Set the Parity bit of the 7188xw to N.
Press ALT + C
Type n
Press ENTER to confirm
Step 8: Set the Data bit of the 7188xw to 8.
Press ALT + C
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Type 8
Press ENTER to confirm
Step 9: Set the Stop bit of the 7188xw to 1.
Press ALT + C. Type 1
Press ENTER to confirm
Step 10: Change the 7188xw to Command Line Mode.
Press ALT+ L
The following screen will be shown:
……………………….
Current work directory="D:\vic\7188\DEMO_v2.9\BC\DEMO32"
original baudrate = 115200!
now baudrate = 115200!
7188xwCmd:B9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
7188xwCmd:n
Change data format to N,8,1
7188xwCmd:8
Change data format to N,8,1
7188xwCmd:1
Change data format to N,8,1
{change to Line Mode}
Step 11: Switch on the power to the I-752N module (disconnect the INIT* and
GND pins) and check that the display on the 5-digit, 7-seg LED is as
below: (For firmware version 3.02 and above, see Note*)
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Step 12: Retrieve the Module Name of the I-752N module.
Type the command  $01M
Press ENTER to send the command to the I-752N module
Check that the module returns  !017521 (for example:
I-7521)
Step 13: Retrieve the Version number of the I-752N module.
Type the command  $01F
Press ENTER to send the command to the I-752N module
Check that the module returns !01(A1.0/A2.0/A3.0/A3.02/..)
Step 14: Change the Module Address of the I-752N module.
Type the command  $01A02
Press ENTER to send the command to the I-752N module
Check that the display on the 5-digit, 7-seg LED is as follows:
(For firmware version 3.02 and above, see Note*)
Type the command  $02M
Press ENTER to send the command to the I-752N module
Check that the module returns  !027521 (for example:
I-7521)
Type the command  $01M
Press ENTER to send the command to the I-752N module
Check that the module returns  No response (for example:
I-7521)
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………………………………
Autodownload files: None
Current work directory="D:\vic\752n\752N_V3_20061023\7188XC"
original baudrate = 115200!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
$01M
!017521
$01F
!01A3.03
$01A02
!01
$02M
!027521
$01M
Step 15: Change the Baud Rate for COM2 of the I-752N module
Type the command  $02B0115200
Press ENTER to send the command to the I-752N module
Check that the display on the 5-digit, 7-seg LED is as follows:
(For firmware version 3.02 and above, see Note*)
Press ALT + C.
Type b115200 to change the Baud Rate of the PC side.
Press ENTER to confirm the Baud Rate=115200.
Type the command  $02M
Press ENTER to send the command to the I-752N module.
Check that the module returns  !027521 (for example
I-7521).
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Type the command  $02F
Press ENTER to send the command to the I-752N module
Check that the module returns  !02(A1.0/A2.0/A3.0/A3.02/..)
(For example: I-7521).
………………….
$01F
!01A3.03
$01A02
!01
$02M
!027521
$01M
$02B0115200
!02
7188xwCmd:b115200original baudrate =
9600!
now baudrate = 115200!
Current baud rate is 115200
$02M
!027521
$02F
!02A3.03
Note*: Refer to Sec. 5.3.2 for more details regarding short
codes for Baud Rates.
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3.2 Connecting to a Single Remote RS-232
Device
Step 1: Connect the I-752N module to the RS-485 network and the remote PC
as follows:
7520
RS-232
RS-485
Host PC
I-7521/22/22A/23/24/27
Remote PC
I-7520
I-7520R
Host-PC
6
7
8
9
1
RS-232
Signal
3
3
4
4
10
+VS
9
8
1
2
2
GND
5
7
6
6
7
5
8
4
9
5
3
2
Male 9-pin D-sub
Date+ 1
Female 9-pin D-sub
Com 1/2/3/4 or
UART port
I-7521/I-7521D
GND
Date-
I-7522/I-7522D
I-7523/I-7523D
Remote-PC
5
6
7
8
9
1
2
3
4
RS-232
Signal
4
3
2
1
13
Ext. GND
+VS
12
Ext. 24V
D2-
11
D2+
10
9
COM2
RS-485
Signal
8
7
COM1
6
Male 9-pin D-sub
5
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
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I-7520
I-7520R
Host-PC
6
7
8
9
1
RS-232
Signal
3
3
4
4
5
5
Male 9-pin D-sub
Female 9-pin D-sub
10
+VS
9
8
1
2
2
GND
7
6
6
7
5
8
4
9
3
Date-
2
Date+
1
Com 1/2/3/4 or
UART port
Remote-PC
6
7
8
9
COM2
1
2
3
4
5
RS-232
Signal
COM1
GND
14
Ext. GND
+VS
13
Ext. 24V
D2-
12
D2+
11
INIT*
10
RXD1
9
TXD1
8
I-7523A/I-7523AD GND
I-7522A/I-7522AD
I-7524/I-7524D
I-7527/I-7527D
RS-485
Signal
7
Male 9-pin D-sub
Com 1/2/3/4 or
UART port
Step 2: Refer to Step 2 to 4 in Sec3.1 to execute 7188xw.exe on the Host PC
Refer to Steps 5 to 9 in Sec.3.1 for details to know how to change the
COM port and status settings to 9600, N, 8, 1
Step 3: Execute 7188xw.exe on the Remote PC
Change the COM port and status settings to 9600, N, 8, 1
Step 4: The Host PC sends “abcde” string to the Remote PC
Type
:01abcde
Press ENTER to send the command string to the I-752N module
Check that the response string on the Remote PC is abcde
The following screen should be shown on the Host PC:
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…………………..
D:\vic\752n\752N_V3_20061023\7188XC>7188xw/c1
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM1 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\752N_V3_20061023\7188XC"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
$01M
!017521
:01abcde
The following screen should be shown on the Remote PC:
D:\vic\752n\752N_V3_20061023\7188XC>7188xw/c7
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim
Tsai.]
[Begin Key Thread...]
Current set: Use COM7 115200,N,8,1
AutoRun:
Autodownload files: None
Current work
directory="D:\vic\752n\752N_V3_20061023\7188XC"
original baudrate = 1200!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
abcde
Step 5: Send “12345” string from the Host PC to the Remote PC
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Type :0112345
Press ENTER to send the command string to the I-752N module
Check that the response string on the Remote PC is 12345
The following screen should be shown on the Host PC:
………………………
Autodownload files: None
Current work directory="D:\vic\752n\752N_V3_20061023\7188XC"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
$01M
!017521
:01abcde
:0112345
The following screen should be shown on the Remote PC:
…………………………..
D:\vic\752n\752N_V3_20061023\7188XC>7188xw/c7
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM7 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\752N_V3_20061023\7188XC"
original baudrate = 1200!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
12345
Note: If no Remote PC is available, the test can be performed by connecting TxD
and RxD to the same COM port.
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……………………………….
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM1 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\others\ECR\061102"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
$01M
!017521
:01NoRemotePC
NoRemotePC
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3.3 Connecting to Multiple Remote RS-232
Device
Step 1: Refer to Sec.3.1 for wiring details and the method used to change the
address and default parameters of the I-752N module
Step 2: Connect the second I-752N module to the RS-485 network and the two
Remote PCs as follows:
I-7520
RS-485
RS-232
Host PC
I-7521/22/22A
/23A/23/24/27
address 01/01/01
/01/ 01/01/01
Remote PC #1
I-7521/22//22A/
23A/23/24/27
address 02/03/03
/04/04/05/08
Remote PC #2
There should now be two I-752N modules connected to the RS-485 network.
The module address of the first I-752N module is address 01, and the second is
address 02/03/03/04/04/05/08 according to different modules. The
communication status parameters of the two I-752N modules will be same, i.e.
9600, N, 8, 1.
Step 3: Refer to Step 2 to 4 in Sec.3.1 to execute 7188xw.exe on the two
Remote PCs. Refer to Steps 5 to 9 in Sec.3.1 for details to see how to
change the COM port and status settings to 9600, N, 8, 1.
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Step 4: Send “To-Remote-PC1” string from the Host PC to the first Remote PC
(#1)
Type
:01To-Remote-PC1
Press ENTER to send the command string to the I-752N module
The following screen will be shown on the Host PC:
...................................
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM1 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\others\ECR\061102"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
:01To-Remote-PC1
The following screen will be shown on the first Remote PC (#1):
(Press ALT+L to change to Line Mode)
……………………….
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM7 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\others\ECR\061102"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
To-Remote-PC1
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Step 5: Send “To-Remote-PC2” string from the Host PC the second Remote
PC(#2)
Type :02To-Remote-PC2
Press ENTER to send the command string to the I-752N module
Type
:02To-Remote-PC2
Press ENTER to send the command string to the I-752N module
The following screen will be shown on the Host PC:
……………………………..
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\others\ECR\061102"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
:01To-Remote-PC1
:02To-Remote-PC2
:02To-Remote-PC2
The following screen will be shown on the second Remote PC (#2):
.................................................
Current set: Use COM7 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\vic\752n\others\ECR\061102"
original baudrate = 9600!
now baudrate = 115200!
7188xwCmd:b9600original baudrate = 115200!
now baudrate = 9600!
Current baud rate is 9600
{change to Line Mode}
To-Remote-PC2
To-Remote-PC2
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3.4 Downloading new Firmware to the
I-752N Module
3.4.1.
Using MiniOS7 Utility to download new firmware
Step 1: Power off I-752N
Step 2: Connect the I-752N module to the Host PC. Refer to Sec. 1.6.1 for
details. (Notice: The download port is COM1, INIT* and GND pins must
be connected.)
Step 3: Power on I-752N. Install the MiniOS7 Utility.
Locate and execute the minios7_utility_v311.exe file. Installation details
can be found in Appendix A MiniOS7 Utility.
Step 4: From the Windows START menu, go to Programs/ICPDAS/MiniOS7
Utility Ver 3.11/and locate the MiniOS7 Utility Ver 3.11.
Step 5: From the
menu, select “New connection”. Select the
correct COM port and set the other parameters. Click the OK button and
the utility will automatically search for the module.
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2
1
Step 6: Ensure that the MiniOS7 Utility is connected to the I-752N module.
indicates it is connected.
indicates that it is disconnected.
See here to determine the
connection status.
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Step 7: Delete all files in the I-752N module and then select the file to be loaded
from the left hand panel. Drag the file to the right hand panel or click
to load file into module.
I-752N(D) file list
Host PC file list
Step 8: Power off I-752N and disconnect INIT* and GND pins.
Note: I-7521/I-7522/I-7523 modules need 752N_C.exe and autoexec.bat.
I-7522A/I-7524/I-7527 modules need 752N_B.exe and
autoexec.bat.
3.4.2.
Using 7188xw.exe to download a file
Refer to Appendix B, 7188XW.EXE, for more information.
Note:
The latest firmware version can be obtained from:
http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/752n/firmware_v3/
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Chapter 4
4.1
DI/DO and WatchDog
DO Operation Principles
 The DO of the I-752N module will revert to its initial start values
when powering on for the first time.
 If the “$AAZNV” command is received, the DO output will change
to desired state. All DO will then remain in the same states until
the next “$AAZNV” command is received.
 If the I-752N module is reset by the hardware watchdog, all DO
will immediately revert to their power-on values. However, these
power-on values may be different from the original states that
existed prior to the reset, so the DO states stored on the Host PC
may be different from real DO states that were latched in the
I-752N module. An “$AAZNV” command must be sent from the
Host PC in order to reset these DO to their expected states.
 The “$AA5” command can be used to detect a hardware
watchdog reset. Refer to Sec.4.5 for more information. If the
I-752N module is reset by the hardware watchdog, an “$AAZNV”
command must be sent from the Host PC to reset the DO to their
expected states.
 If the host watchdog fails, all DO values will revert to their safe
values immediately and the module status will be set to 04. If an
“$AAZNV” is sent by the Host PC, the modules will ignore the
command and return “!” as a warning. The“~AA1” command can
be used to clear the module status to 00, then the I-752N module
will again be able to accept an “$AAZNV” command.
4.2
DI Operation Principles
The I-752N series DI commands are as follows:
(1) #**
synchronized sampling. All modules will sample
the DI at the same time
(2) $AA4
reads the synchronized sampling data.
(3) $AAYN reads the current state of the DI
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The host computer can only send one command string at a time. If
there are two modules, the host computer must send and receive the
commands from module1 before sending/receiving any commands
from module2, which means that there is a time delay between the
two commands. The “synchronize sampling” command is designed
for all input modules. When receiving the “#**[0x0D]” synchronized
sampling command, all input modules in an RS-485 network will
perform input functions at the same time and store these values into
the module’s memory. The host computer can then send an “$AA4”
read synchronized data command to read the data separately
4.3
Dual WatchDog Operation Principles
All I-752N modules are equipped with a hardware module watchdog
and a software host watchdog. The I-752N modules are designed for
industrial application, therefore they are able to operate in harsh
environments. As there are usually a great amount of noise or energy
transients in such an environment, the modules may automatically
shut down if the noise becomes too large. The built-in hardware
module watchdog will reset the module if it shuts down or
malfunctions because the noise signal has become too large.
Sometimes, even the Host PC may shut down or malfunction
because of hardware or software reasons. The software host
watchdog can monitor the status of Host PC. If the Host PC fails or is
off-line for any reason, the output state of the I-752N modules will
revert to its predefined safe states for safety protection purposes.
If the RS-485 network is open, any commands from the Host PC will
not be able to be sent to the remote modules. This is very dangerous
in real world applications. The I-752N series output module will force
the output to revert to its predefined safe state for safety
considerations if the host watchdog is enabled. This dual watchdog
feature will greatly increase the system reliability.
4.4
Host WatchDog Application Notes
The software host watchdog is designed to monitor the host
computer. If the host computer fails, the output of the I-752N
modules will automatically revert to its safe state to avoid
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unnecessary damage. The flow chart for the host computer is as
follows:
Set Safe Value
Enable host watchdog
Function 1
Send ~**(CrLf) to
reset the host watchdog
timer before the time
out expires
Function n
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4.5
Module WatchDog Application Notes
The “$AA5” command is designed to detect any module hardware
watchdog failure. If the module was malfunctioned, the module
hardware watchdog circuit will reset the module. After reset, the output
state of the module will revert to its initial start values. The start value
may be different from the output values prior to the module reset.
Therefore the user must send the output commands to the module
again in order to maintain the same output state both before and after
the module watchdog reset.
The flow chart for module hardware watchdog failure detection is as
follows:
Send “$AA5” and determine
S=1
S=1
All DO will now be in their
start-value.
Send a “$AAZNV” command
to reset the DO modules to
their desire states.
Send “$AA5” and determine
S=?
S=0
Function 1
Function n
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Chapter 5
Command Sets
5.1 Command Set Table
Command
Response
Description
Reference
$AAA[addr]
!AA
Read/Set the Module Address
Sec. 5.3.1
$AABN[baud rate]
!AA[baud rate]
Read/Set the Baud Rate for COM-1/2/3/4/5/6/7/8
Sec. 5.3.2
$AADN[data-bit]
!AA[data-bit]
Read/Set the Data Bit for COM-1/2/3/4/5/6/7/8
Sec. 5.3.3
$AAPN[parity-bit]
$AAON[stop-bit]
!AA[parity-bit]
!AA[stop-bit]
Read/Set the Parity Bit for COM-1/2/3/4/5/6/7/8
Sec. 5.3.4
Read/Set the Stop Bit for COM-1/2/3/4/5/6/7/8
Sec. 5.3.5
$AA6[ID]
!AA
Set the ID-string for COM-1/3/4/5/6/7/8
Sec. 5.3.6
$AA7
!AA[ID]
Read the ID-string for COM-1/3/4/5/6/7/8
Sec. 5.3.7
$AAC[delimiter]
!AA[delimiter]
Read/Set the delimiter for COM-1/3/4/5/6/7/8
Sec. 5.3.8
$AAD
!AA[delimiter]
Read the delimiter for COM-1/3/4/5/6/7/8
Sec. 5.3.9
(delimiter)AA(bypass) Depend on device
Bypass the data string to COM-1/3/4/5/6/7/8
Sec. 5.3.10
$AAKV
!AA[checksum]
Read/Set the checksum status of COM2 (RS485)
Sec. 5.3.11
$AATN[CrLfmode]
!AA[CrLfmode]
Read/Set the end char which is used to judge the
Sec. 5.3.12
end of command/response for COM1/2/3/4/5/6/7/8
$AAW
!AA(status)
Read the CTS_status of COM-1/3/4/5
Sec. 5.3.13
$AAXV
!AA
Set the RTS_state of COM-1/3/4/5
Sec. 5.3.14
$AAYN
!AA(status)
Read the onboard DI-1/2/3/4/5
Sec. 5.3.15
$AAZNV
!AA(status)
Read/Set the onboard DO-1/2/3/4/5
Sec. 5.3.16
#**
No Response
Synchronized Sampling
Sec. 5.3.17
$AA4
!AASV
Read the synchronized data
Sec. 5.3.18
$AA5
!AAS
Read the Reset status
Sec. 5.3.19
$AAF
!AA[number]
Read the firmware version number
Sec. 5.3.20
$AAM
!AA[name]
Read the module name
Sec. 5.3.21
$AA2
!AABDPK
Read the configuration of COM2 (RS485)
Sec. 5.3.22
~**
No Response
Host is OK
Sec. 5.3.23
~AA0
!AASS
Read the module status
Sec. 5.3.24
~AA1
!AA
Reset the module status
Sec. 5.3.25
~AA2
!AASTT
Read the host watchdog status and value
Sec. 5.3.26
~AA3ETT
!AASTT
Enable the host watchdog timer
Sec. 5.3.27
~AA4P/~AA4S
!AAV
Read the power-on/safe value
Sec. 5.3.28
~AA5P/~AA5S
!AAV
Set the power-on/safe value
Sec. 5.3.29
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$AAU
[data]
Read data from the RS-232 COM port buffer.
Sec. 5.3.30
$AAL[data]
!AA
Write to the expansion board DO-0/1/2/3
Sec. 5.3.31
$AAR
!AA[data]
Read the expansion board DI-0/1/2/3
Sec. 5.3.32
$AAJN[timeout]
!AA[timeout]
Read/Set the delay time to determine whether the
Sec. 5.3.33
end of a command/response was been transmitted
/receiver
$AAGN[trigger level]
!AA[triggerlevel] Read/Set the Trigger Level
Sec. 5.3.34
@AA[data]
>AA[data]
Read/Set the onboard DI/DO-1/2/3/4/5
Sec. 5.3.35
#AABBHH
>
Set the multiple onboard DO-1/2/3/4/5
Sec. 5.3.36
#AABCDD
>
Set the single onboard DO-1/2/3/4/5
Sec. 5.3.37
$AAEV
!AA(status)
Read/Set prefixed address status on the response.
Sec. 5.3.38
(Supported by the firmware version 3.05 and
upward)
$AAHV
!AA(status)
Read/Set the status for bypassing the data string to Sec. 5.3.39
COM2.(Supported by the firmware version 3.08
and upward)
$AAIV
!AA
Restore factory default setting.
Sec. 5.3.40
(Supported by the firmware version 3.08 and
upward)
5.2 Address Mapping Table
I-7521
I-7522
I-7523
I-7522A
I-7524
I-7527
COM1 (RS-232)
AA
AA
AA
AA
AA
AA
COM2 (RS-485)
AA
AA
AA
AA
AA
AA
COM3 (RS-232)
/(RS-422)
N/A
AA+1
AA+1
AA+1
(RS-422)
AA+1
AA+1
COM4 (RS-232)
N/A
N/A
AA+2
N/A
AA+2
AA+2
COM5 (RS-232)
N/A
N/A
N/A
N/A
AA+3
AA+3
COM6 (RS-232)
N/A
N/A
N/A
N/A
N/A
AA+4
COM7 (RS-232)
N/A
N/A
N/A
N/A
N/A
AA+5
COM8 (RS-232)
N/A
N/A
N/A
N/A
N/A
AA+6
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5.3 Commands
5.3.1
$AAA[addr]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the module address
$AAA[chk](CrLf)
 reads the module address stored in the EEPROM
$AAA[addr][chk](CrLf)  sets the module address

Syntax:
$AAA[addr][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from 00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
command:
response:
command:
response:
command:
response:

$01A02(CrLf)
!01(CrLf)
$02AA0(CrLf)
!02(CrLf)
$00A(CrLf)
!02(CrLf)
address 01 is changed to 02
address 02 is changed to 0xA0
address stored in EEPROM=02
(see NOTE 2)
Notes:
(1) The AA address value will be displayed on LED1 and LED2. Refer to Sec.3.1 for
more information.
(2) Connect the DI/INIT* pin to GND pin and use the $00A command to read
the address stored in the EEPROM.
(Refer to Sec. 2.1 INIT* Pin Operating Principles.)
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5.3.2
$AABN[baud rate]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the Baud Rate for COM 1/2/3/4/5/6/7/8
$AABN[chk](CrLf)  Reads the Baud Rate for COM 1/2/3/4/5/6/7/8 stored in
the EEPROM
$AABN[baud rate][chk](CrLf)  Sets the Baud rate for COM 1/2/3/45/6/7/8

Syntax:
$AABN[baud rate][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
Read/Set the Baud Rate for the COM 2
N=1
Read/Set the Baud Rate for the COM 1/3/4/5/6/7/8
[baud rate] Valid values are 300/600/1200/2400/4800/9600/19200/38400/
57600/115200
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[baud rate][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01B0115200(CrLf) Changes the RS-485 (COM2) Baud Rate to 115200
bps
response: !01(CrLf)
command: $01B19600(CrLf)
Changes the RS-232 (COM1) Baud Rate to 9600
bps
response: !01(CrLf)
command: $02B138400(CrLf) Changes the RS-232 (COM3) Baud Rate to 38400
bps
response: !02(CrLf)
command: $03B1(CrLf)
Reads the RS-232 (COM4) Baud Rate.
response: !0357600(CrLf)
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
Notes:
(1) Address mapping refers to Sec.5.2
(2) Short code for the baud rates:
300=1, 600=2, 1200=3, 2400=4, 4800=5, 9600=6, 19200=7, 38400=8,
57600=9,115200=A. the short code for the Baud Rate will be shown on
LED3 of the 7-segment.
Refer to Sec. 3.1 for more information.
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5.3.3
$AADN[data-bit]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the data bit for COM 1/2/3/4/5/6/7/8
$AADN[chk](CrLf)  Reads the data bit for COM 1/2/3/4/5/6/7/8 stored in the
EEPROM
$AADN[data-bit][chk](CrLf)  Sets the data bit for COM 1/2/3/4/5/6/7/8

Syntax:
$AADN[data-bit][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
Reads/Sets the data bit for the COM 2
N=1
Reads/Sets the data bit for the COM 1/3/4/5/6/7/8
[data-bit] will be either 7 or 8
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[data-bit][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01D08(CrLf)
Changes the data bit to 8 for the RS-485 (COM2)
response: !01(CrLf)
command: $01D17(CrLf)
Changes the data bit to 7 for the RS-232 (COM1)
response: !01(CrLf)
command: $02D17(CrLf)
Changes the data bit to 7 for the RS-232 (COM3)
response: !02(CrLf)
command: $03D17(CrLf)
Changes the data bit to 7 for the RS-232 (COM4)
response: !03(CrLf)

Notes:
(1) Address mapping refers to Sec.5.2
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(2) Valid data bit values:
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
I-7521
7/8
7/8
N/A
N/A
N/A
N/A
N/A
N/A
I-7522
7/8
7/8
7/8
N/A
N/A
N/A
N/A
N/A
I-7522A
7/8
7/8
7/8
N/A
N/A
N/A
N/A
N/A
I-7523
7/8
7/8
7/8
7/8
N/A
N/A
N/A
N/A
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I-7524
7/8
7/8
7/8
7/8
7/8
N/A
N/A
N/A
I-7527
7/8
7/8
7/8
7/8
7/8
7/8
7/8
7/8
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5.3.4
$AAPN[parity-bit]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the parity bit for COM 1/2/3/4/5/6/7/8
$AAPN[chk](CrLf)
 Reads the parity bit for COM 1/2/3/4/5/6/7/8 stored in
the EEPROM
$AAPN[parity-bit][chk](CrLf)  Sets the parity bit for COM 1/2/3/4/5/6/7/8

Syntax:
$AAPN[parity-bit][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
Reads/Sets the parity bit for the COM 2
N=1
Reads/Sets the parity bit for the COM 1/3/4/5/6/7/8
[parity-bit] 0=NONE, 1=EVEN, 2=ODD
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[parity-bit][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01P00(CrLf)
Changes parity-bit to NONE for RS-485 (COM2)
response : !01(CrLf)
command: $01P10(CrLf)
Changes parity-bit to NONE for RS-232 (COM1)
response : !01(CrLf)
command: $02P11(CrLf)
Changes parity-bit to EVEN for RS-232 (COM3)
response : !02(CrLf)
command: $03P12(CrLf)
Changes parity-bit to ODD for RS-232 (COM4)
response : !03(CrLf)
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
Notes:
(1) Address mapping refers to Sec.5.2
(2) Valid parity bit values:
I-7521
I-7522
I-7522A
COM1 (RS-232)
N/E/O
N/E/O
N/E/O
COM2 (RS-485)
N/E/O
N/E/O
N/E/O
COM3 (RS-232)*
N/A
N/E/O
N/E/O
COM4 (RS-232)
N/A
N/A
N/A
COM5 (RS-232)
N/A
N/A
N/A
COM6 (RS-232)
N/A
N/A
N/A
COM7 (RS-232)
N/A
N/A
N/A
COM8 (RS-232)
N/A
N/A
N/A
N: None
E: Even
O: Old
*COM3 of the I-7522A module is RS-422/485
I-7523
N/E/O
N/E/O
N/E/O
N/E/O
N/A
N/A
N/A
N/A
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N/E/O
N/E/O
N/E/O
N/E/O
N/E/O
N/A
N/A
N/A
I-7527
N/E/O
N/E/O
N/E/O
N/E/O
N/E/O
N/E/O
N/E/O
N/E/O
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5.3.5
$AAON[stop-bit]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the stop bit for COM 3/4/5/6/7/8
$AAON[chk](CrLf)  Reads the stop bit of COM 3/4/5/6/7/8 stored in the
EEPROM
$AAON[stop-bit][chk](CrLf)  Sets the stop bit for COM 3/4/5/6/7/8

Syntax:
$AAON[stop-bit][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
Reads the stop bit for the COM 2
N=1
Reads/Sets the stop bit for the COM 1/3/4/5/6/7/8
[stop-bit] 1/2 for COM1/3/4/5/6/7/8
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[stop-bit][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating ad invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $02O12(CrLf)
Changes the stop bit to 2 for the RS-232 (COM3)
response: !02(CrLf)
command: $03O12(CrLf)
Changes the stop bit to 2 of the RS-232 (COM4)
response: !03(CrLf)

Notes:
(1) Address mapping refers to Sec.5.2
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(2) Valid stop bit values:
COM1
(RS-232)
COM2
(RS-232)
COM3
(RS-232)
COM4
(RS-232)
COM5
(RS-232)
COM6
(RS-232)
COM7
(RS-232)
COM8
(RS-232)
I-7521
I-7522
I-7522A
I-7523
I-7524
I-7527
1 or 2
1 or 2
1 or 2
1 or 2
1 or 2
1 or 2
1
1
1
1
1
1
N/A
1 or 2
1 or 2
1 or 2
1 or 2
1 or 2
N/A
N/A
N/A
1 or 2
1 or 2
1 or 2
N/A
N/A
N/A
N/A
1 or 2
1 or 2
N/A
N/A
N/A
N/A
N/A
1 or 2
N/A
N/A
N/A
N/A
N/A
1 or 2
N/A
N/A
N/A
N/A
N/A
1 or 2
(3) COM3 of the I-7522A module is RS-422/485
(4) The stop bit for COM1 & COM2 is always 1 when data bit is 8.
(5) COM (1/3/4/5/6/7/8) of the I-7521/I-7522/7523/7523A/7524/7527 module can be
linked to the HP34401A
(6) The stop bit can be set to 2 as the data bit is 7 for COM 1, otherwise the
stop bit can only be set to 1 as the data bit is 8 for COM 1.
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5.3.6
$AA6[ID]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function sets the ID string for COM 1/3/4/5/6/7/8.
Max-number of characters =50.

Syntax:
$AA6[ID][chk](CrLf)
$
Delimiter character
AA
2-character module address in the format. The valid range is from 00
to FF
[ID]
ID string, Max-number of character =50
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $016Temperature1(CrLf) The ID for the RS-232 (COM1) is Temperature1
response: !01(CrLf)
command: $026HP34401A-1(CrLf) The ID for the RS-232 (COM3) is HP34401A-1
response: !02(CrLf)
command: $036HP34401A-2(CrLf) The ID for the RS-232 (COM4) is HP34401A-2
response: !03(CrLf)

Note:
Address mapping refers to Sec.5.2
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5.3.7
$AA7
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the ID string for COM 1/3/4/5/6/7/8

Syntax:
$AA7[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA(ID)[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error ,or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
(ID)
ID string. Maximum number of characters=50
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $017(CrLf)
The ID for the RS-232 (COM1) is Temperature1
response: !01Temperature1(CrLf)
command: $027(CrLf)
The ID for the RS-232 (COM3) is HP34401A-1
response: !02HP34401A-1(CrLf)
command: $037(CrLf)
The ID for the RS-232 (COM4) is HP34401A-2
response: !03HP34401A-2(CrLf)

Note:
Address mapping refers to Sec.5.2
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5.3.8
$AAC[delimiter]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This reads/sets the delimiter for COM 1/3/4/5/6/7/8
$AAC[chk](CrLf)  Reads the delimiter for COM 1/3/4/5/6/7/8stored in the
EEPROM
$AAC[delimiter][chk](CrLf)  Sets the delimiter for COM1/3/4/5/6/7/8

Syntax:
$AAC[delimiter][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[delimiter] Default delimiter is :
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[delimiter][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error ,or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01C(CrLf)
Reads the delimiter for the RS-232 (COM1)  :
response: !01:(CrLf)
command: $02C(CrLf)
Reads the delimiter for the RS-232 (COM3)  :
response: !02:(CrLf)
command: $03C*(CrLf)
Changes the delimiter for the RS-232 (COM4)  *
response: !03(CrLf)

Notes:
(1) Address mapping refers to Sec.5.2
(3) The delimiter of COM1/3/4/5/6/7/8 can be different.
(4) The default delimiter is  :
(5) The delimiter cannot be $, ~, #, @, %, CR & LF
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5.3.9
$AAD
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the delimiter for COM 1/3/4/5/6/7/8

Syntax:
$AAD[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA(delimiter)[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
(delimiter) the default delimiter is  :
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01D(CrLf)
Reads the delimiter for the RS-232 (COM1)  :
response: !01:(CrLf)
command: $02D(CrLf)
Reads the delimiter for the RS-232 (COM3)  :
response: !02:(CrLf)
command: $03D(CrLf)
Reads the delimiter for the RS-232 (COM4)  *
response: !03*(CrLf)

Note:
Address mapping refers to Sec.5.2
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5.3.10 [delimiter]AA[bypass]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function bypasses the data string to COM 1/3/4/5/6/7/8

Syntax:
(delimiter)AA(pass)[chk](CrLf)
(delimiter) Refer to Section 5.3.8
AA
2-character module address in HEX format. The valid range is from
00 to FF
(bypass) The data string sent to COM 1/3/4/5/6/7/8
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: The response received will depend on the device used

Example: (Assume the AA address value of the I-7523 module is 01. The delimiters for
COM1/3/4 are : , ; , and *, respectively)
command:
response:
command:
response:
command:
response:

:01abcde(CrLf)
Send abcde to COM1
Depends on the device
;02123456789(CrLf)
Send 123456789 to COM3
Depends on the device
*03test(CrLf)
Send test to COM4
Depends on the device
Note:
Address mapping refers to Sec.5.2
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5.3.11 $AAKV
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the checksum status
$AAK[chk](CrLf)
 Reads the checksum status stored in the EEPROM
$AAKV[chk](CrLf)
 Sets the checksum status

Syntax:
$AAK[V][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
V=0
checksum disabled
V=1
checksum enabled
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[V][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response:  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
V=0
checksum disabled
V=1
checksum enabled
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the first AA address value of the I-7523 module is 01, the other is 04)
command: $01K000(CrLf)
Checksum=1. Disables the checksum
response: !0182(CrLf)
chk: 00,82
command: $04K1(CrLf)
The checksum is enabled
response: !04(CrLf)

Notes:
(1) Address mapping refers to Sec.5.2
(2) The checksum enable/disable function is valid for COM2 only.
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5.3.12 $AATN[CrLfmode]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets what the characters are as judging the end of command or
response string.
$AATN[chk](CrLf)  Reads the setting value of CrLfmode stored in the
EEPROM.
$AATN(CrLfmode)[chk](CrLf)  Sets the setting value of CrLfmode for the
command/response string.

Syntax:
$AATN[CrLfmode][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
Reads/Sets the CrLfmode value of the COM 2
N=1
Reads/Sets the CrLfmode value of the COM 1/3/4/5/6/7/8
(CrLfmode): 0  (CrLf)=0x0D (CR)
1  (CrLf)=0x0D+0x0A (CR+LF)
2  (CrLf)=0x0A (LF)
3  (CrLf)=0x0A+0x0D (LF+CR)
4  No end character
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command
 !AA[CrLfmode][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01T0(CrLf)
The end char for COM2 is no end character
response: !014(CrLf)
command: $01T1(CrLf)
The end char for COM1 is 0x0D+0x0A
response: !011(CrLf)
command: $02T1(CrLf)
The end char for COM3 is 0x0A
response: !022(CrLf)
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command: $03T1(CrLf)
response: !033(CrLf)

The end char for COM4 is 0x0A+0x0D
Notes:
(1) Address mapping refers to Sec.5.2.
(2) The default CrLfmode = 4  ie.the default (CrLf)=NONE for all port.
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5.3.13 $AAW
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the CTS status for COM 1/3/4/5

Syntax:
$AAW[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AAS[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
S=0
CTS is inactive
S=1
CTS is active HIGH
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01W(CrLf)
The CTS status for COM1 is inactive now.
response: !010(CrLf)
command: $02W(CrLf)
The CTS status for COM3 is active-HIGH now.
response: !021(CrLf)
Address mapping for CTS status:
Com1
Com3
(RS-232)
(RS-232)
I-7521
AA
N/A
I-7522
AA
AA+1
I-7522A*
AA
N/A
I-7523
AA
AA+1
I-7524
AA
AA+1
I-7527
AA
N/A

Com4
(RS-232)
N/A
N/A
N/A
N/A
AA+2
N/A
Com5
(RS-232)
N/A
N/A
N/A
N/A
AA+3
N/A
Note:
(1) The CTS status is valid for COM1, COM3, COM4 and COM5
(2) *COM3 of the I-7522A module is RS-422/485
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5.3.14 $AAXV
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function sets the RTS state for COM 1/3/4/5

Syntax:
$AAXV[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
V=0
Sets the RTS state to inactive
V=1
Sets the RTS state to active_HIGH
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error ,or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01X0(CrLf)
Sets the RTS status of COM1 to inactive
response: !01(CrLf)
command: $02X1(CrLf)
Sets the RTS status of COM3 to active-HIGH
response: !02(CrLf)
Address mapping for RTS status
Com1
Com3
(RS-232)
(RS-232)
I-7521
AA
N/A
I-7522
AA
AA+1
I-7522A*
AA
N/A
I-7523
AA
AA+1
I-7524
AA
AA+1
I-7527
AA
N/A

Com4
(RS-232)
N/A
N/A
N/A
N/A
AA+2
N/A
Com5
(RS-232)
N/A
N/A
N/A
N/A
AA+3
N/A
Note:
(1)The RTS status is valid for COM1, COM3, COM4 and COM5
(2) *COM3 of the I-7522A module is RS-422/485
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5.3.15 $AAYN
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the onboard DI 1/2/3/4/5

Syntax:
$AAYN[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N 1  Reads DI1,
2  Reads DI2,
3 Reads DI3
4  Reads DI4,
5  Reads DI5 (I-7522A refer to Sec.1.4)
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AAS[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=0
DI=Low,
S=1
DI=High (DI floating will return High)
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: $01Y1(CrLf)
DI1=Low
response: !010(CrLf)
command: $01Y2(CrLf)
DI2=High
response: !011(CrLf)
command: $01Y3(CrLf)
DI3=Low
response: !010(CrLf)
DI mapping table:
DI1
I-7521
No
I-7522
No
I-7522A
Yes
I-7523
No
I-7524
Yes
I-7527
Yes
DI2
Yes
Yes
Yes
Yes
No
No
DI3
Yes
Yes
Yes
No
No
No
DI4
No
No
Yes
No
No
No
DI5
No
No
Yes
No
No
No
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5.3.16 $AAZNV
For: I-7521/I-7522/I-7522A/I-7524/I-7527

Description:
This function reads/sets the onboard DO 1/2/3/4/5
$AAZN[chk](CrLf)
 Reads onboard DO 1/2/3/4/5
$AAZNV[chk](CrLf)
 Sets onboard DO 1/2/3/4/5

Syntax:
$AAZNV[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N
1 Writes DO1,
2 Writes DO2,
3 Writes DO3
4 Writes DO4,
5 Writes DO5
(I-7522A pin assignment refer to Sec.1.4)
V=0
Sets the DO to off,
V=1
Sets the DO to on
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AAS[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response
 syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=0
DO = off
S=1
DO = on
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: $01Z10(CrLf)
Set DO1=OFF
response: !01(CrLf)
command: $01Z21(CrLf)
Set DO2=ON
response: !01(CrLf)
command: $01Z3(CrLf)
Read DO3=OFF
response: !010(CrLf)
Do mapping table:
DO1
I-7521
Yes
I-7522
Yes
DO2
Yes
No
DO3
Yes
No
DO4
No
No
DO5
No
No
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I-7522A
I-7523
I-7524
I-7527

Yes
No
Yes
Yes
Yes
No
No
No
Yes
No
No
No
Yes
No
No
No
Yes
No
No
No
Note:
If the host fails, the $AAZNY command will be ignored. And the response string will
be !
(In normal situation, the response string will be !AA(S))
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5.3.17 #**
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function regards each input module on the network, both digital and analog, to
sample its entire input data immediately and store the data in the internal register of the
module. Later the host computer can read the data individually by using the read
synchronized data $AA4 command.

Syntax:
#**[chk](CrLf)
#
Delimiter character
*
Command character
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: no response

Example: (Assume the AA address value of the I-7521 module is 01)
Orders all modules to perform synchronized
command: #**(CrLf)
sampling
response: no response
command: $014(CrLf)
DI1=DI2=DI3=1
response: !0117(CrLf)
command: $014(CrLf)
DI1=DI2=1, DI3=0
response: !0113(CrLf)
command: $014(CrLf)
DI1=1, DI2=DI3=0
response: !0111(CrLf)
What is “synchronized sampling?”
The host computer can only send one command string at a time. If there are two
modules, the host computer must send and receive the commands from module 1
then the commands from module 2 in response, so there is a time delay between
the two commands. The “synchronized sampling” command is designed for all input
modules. When the synchronized sampling command #**[CrLf] is received, all
input modules on theRS-485 network will perform the input function at the
same time and store the values into the intend memory of the module. The host
computer can then send a read synchronized data command $AA4 to read the data
separately.
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5.3.18 $AA4
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the synchronized data.

Syntax :
$AA4[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from 00
to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf) End Character

Response : valid command
 !AASV[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=1
first reading,
S=0
not the first reading
V
D0=DI1, D1=DI2, D2=DI3, D3=DI4, D4=DI5
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example : (Assume the AA address value of the I-7521 module is 01)
command: #**(CrLf)
Orders all modules to perform synchronized
response: no response
sampling
command: $014(CrLf)
DI1=DI2=DI3=1
response: !0117(CrLf)
command: $014(CrLf)
DI1=DI2=1, DI3=0
response: !0113(CrLf)
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What is “synchronized sampling? ”
The host computer can only send one command string at a time. If there are
two modules, the host computer must send and receive the commands from
module 1 then the commands from module 2 in response, so there is a time
delay between the two commands. The “synchronized sampling” command is
designed for all input modules. When the synchronized sampling command
#**[CrLf] is received, all input modules on theRS-485 network will perform
the input function at the same time and store the values into the intend
memory of the module. The host computer can then send a read
synchronized data command $AA4 to read the data separately.
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5.3.19 $AA5
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the reset status of the module. This is the only command that
detects the module hardware watchdog failure. If the module is malfunction, the module
hardware watchdog circuit will reset the module. This reset will cause the output state of
the module to return to its start-up values. The start-up values may be different from the
output values in use prior to the module reset. Therefore, an output command needs to
be resent to the module in order to maintain the same output state once the module
hardware watchdog circuit reset the module.

Syntax:
$AA5[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command
 !AAS[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=0
the module has not been reset since the last reset status was read
S=1
the module has been reset since the last reset status was read
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: $015(CrLf)
It is first time power-on reset
response: !011(CrLf)
command: $015(CrLf)
The reset status is normal
response: !010(CrLf)
This module has been reset by the module
command: $015(CrLf)
Hardware watchdog. Therefore all output
response: !011(CrLf)
will be returned to its initial
start values
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
Note:
When the module is first powered-on, the module should be read once and will find that
S=1. Then the user should read the module continually and find that S=0. If S is
changed to 1, this module has been reset by module hardware watchdog circuit at
least once. And all output is going to its start-value now. Therefore the user needs to
send an output command again to control all output values to desired states.
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5.3.20 $AAF
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527
 Description:
This function reads the firmware version number.

Syntax:
$AAF[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA(number)[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
number
4 or 5-character value denoting the version number
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume one I-7521 module is addressed 01, another is 02)
command: $01F(CrLf)
The version number of module 01 version is
2.0
response: !01A2.0(CrLf)
command: $02F(CrLf)
The version number of module 02 version is
3.0
response: !02A3.0(CrLf)
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5.3.21 $AAM
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the module name.

Syntax:
$AAM[chk](CrLf)
$
Delimiter character
AA
2-character HEX module address, from 00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AA(name)[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character HEX module address
name
4 or 5-character value/string denoting the module name
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
command:
response:
command:
response:
$01M(CrLf)
!017521(CrLf)
$02M(CrLf)
!027523(CrLf)
The name of module 01 is 7521
The name of module 02 is 7523
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5.3.22 $AA2
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the configuration code of COM2 (RS-485) stored in the
EEPROM

Syntax:
$AA2[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AA40BDPK[chk] (CrLf)
invalid command  ?AA[chk] (CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
40
type code of module
B
short code for the Baud Rate. Refer to Sec.5.3.2 for more details
D
data bit. Refer to Sec.5.3.3 for more details
P
parity bit. Refer to Sec.5.3.4 for more details
K
checksum status. Refer to Sec.5.3.11 for more details
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume that the INIT* Pin and GND Pin is connected)
command: $002(CrLf)
response: !00406800(CrLf)
The COM2 (RS-485) has a Baud Rate of
9600 BPS, data bit 8, parity bit none, and the
checksum is disabled
command: $002(CrLf)
response: !0040A801(CrLf)
The COM2 (RS-485) has a Baud Rate of
115200 BPS, data bit 8, parity bit none, and
the checksum is enabled
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5.3.23 ~**
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
The Host computer sends this command to tell all modules that the “Host is OK”.
The host watchdog timer is reset and restarted.

Syntax:
~**[chk](CrLf)
~
Delimiter character
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: no response

Example:
command: ~**(CrLf)
response: No Response
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5.3.24 ~AA0
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the module status, which will be latched until the ~AA1 command is
sent.
If the module status=0x04, all output commands will be ignored.

Syntax:
~AA0[chk](CrLf)
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AASS[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
SS
2-character status value in HEX format as follows:
Bit_0 = reserved
Bit_1 = reserved
Bit_2 = 0  OK,
1  Host watchdog failure
Bit_7 = 1  Host watchdog timer is enabled.
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
command: ~010(CrLf)
response: !0100(CrLf)
The status of module 01 is OK
command: ~020(CrLf)
response: !0204(CrLf)
The status of module 02 is “host watchdog
failure”  HOST is off-line now
command: ~020(CrLf)
response: !0280(CrLf)
The status of module 02 is ---host watchdog
is running
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5.3.25 ~AA1
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function resets the module status, which will be latched until the ~AA1 command is
sent. If the module status=0x04, all output commands will be ignored. Therefore
the module status should be read first to ensure that the current status is 0. If the
module status is not 0, it can only be cleared by sending the ~AA1 command.

Syntax:
~AA1[chk](CrLf)
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AA[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: ~010(CrLf)
The module status=0x04  host is
off-line
response: !0104(CrLf)
The output command is ignored
command: $01Z11(CrLf)
response: !(CrLf)
command: ~011(CrLf)
Clears the module status
response: !01(CrLf)
command: ~010(CrLf)
Reads the module status=0x00
response: !0100(CrLf)
command: $01Z11 (CrLf)
The output command is OK
response: !01(CrLf)
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I-752N Series Module Status Comparison:
(1) Module hardware watchdog reset
 All DO values return to their initial start values
 No change in module status
 Accepts host DO command to change the DO state
(2) Host software watchdog failure
 All DO values return to their saved values
 Module status=04  host watchdog failure
 Ignores all host DO commands until the module status is cleared to 0 using the ~AA1
command
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5.3.26 ~AA2
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads the status of the host watchdog and the host watchdog timer value.
The host watchdog timer is designed for the software host watchdog. When the software
host watchdog is enabled, the host must send a ~** “HOST is OK command”(See
sec.5.3.23) to all modules before the timer expires. When the ~** command is received,
the host watchdog timer is reset and restarted. Use the ~AA3ETT command to
enable/disable/set the host watchdog timer.

Syntax:
~AA2[chk](CrLf)
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AASTT[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=0
The host watchdog timer is disabled
S=1
The host watchdog timer is enabled
TT
2-character timer value in HEX format. The valid range is from 00 to
FF. Units=0.1 sec
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
command:
response:
command:
response:
~012(CrLf)
!01000(CrLf)
~022(CrLf)
!0210A(CrLf)
The host watchdog timer of module 01 is
disabled
The host watchdog timer of module 02 is
enabled and is set to 0.1*10 =1 second.
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I-752N Series Module Status Comparison:
(1) Module hardware watchdog reset
 All DO values return to their initial start values
 No change in module status
 Accepts a host DO command to change the DO state
(2) Host software watchdog failure
 All DO values return to their initial save values
 Module status=04  host watchdog failure
 Ignores all host DO commands until the module status is cleared to 0 using the ~AA1
command
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5.3.27 ~AA3ETT
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function enables/disables the host watchdog timer and sets the value. The host
watchdog timer is designed for the software host watchdog. When the software host
watchdog is enabled, the host must send a ~** “HOST is OK” command (see Sec
5.3.23), to all modules before the timer expires. When the ~** command is received, the
host watchdog timer is reset and restarted. Using the ~AA2 command to read the host
watchdog status and value.

Syntax:
~AA3ETT[chk](CrLf)
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
E=0
Disables the host watchdog timer
E=1
Enables the host watchdog timer
TT
2-character timer value in HEX format. The valid range is from 00 to
FF. Units=0.1sec
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AASTT[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S=0
The host watchdog timer is disabled
S=1
The host watchdog timer is enabled
TT
2-character timer value in HEX format. The valid range is from 00 to
FF.Units=0.1 sec
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
command: ~013000(CrLf)
response : !01000(CrLf)
command: ~02310A(CrLf)
response : !0210A(CrLf)
Disables the host watchdog timer for
module 01
The host watchdog timer of module 02 is
enabled and is set to 0.1*10 =1 second.
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5.3.28 ~AA4P & ~AA4S
For: I-7521/I-7522/I-7522A/I-7524/I-7527

Description:
This function reads power-on/safe value.
(1) When the module is first powered-on, all output channels will revert to their initial
power-on values.
(2) If the module is malfunction, the hardware module watchdog will reset the module
and all output channels will also revert to their power-on values. These
power-on values may be different from the previous values that existed before
the module was reset. Therefore, new output commands must be set to return all
output values to their desired states.
(3) When the host watchdog is enabled and the host is malfunction, all output values
will change to their safe values and the module status will be set to 0x04. If the
module status is 0x04, all output commands will be ignored until the module status
is cleared using the ~AA1 command (see sec.5.3.23). Therefore an ~AA1 command
must be sent before any new output commands are sent to return all output values
to their desired states.

Syntax:
~AA4P[chk](CrLf)  reads the power-on value
~AA4S[chk](CrLf)  reads the safe value
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AAV[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
V
D0=DO0, D1=DO1, D2=DO3, D3=DO4, D4=DO5
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: ~014P(CrLf)
The power-on value is DO-1/2/3 all ON
response: !017(CrLf)
command: ~014S(CrLf)
response: !010(CrLf)
The safe value is DO-1/2/3 all OFF
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5.3.29 ~AA5P & ~AA5S
For: I-7521/I-7522/I-7522A/I-7524/I-7527

Description:
This function sets the current state of the digital output as a power-on/safe value.
(1) When the module is first powered-on, all output channels will revert to their
power-on values.
(2) If the module is malfunction, the hardware module watchdog will reset the module
and all output channels will also revert to their power-on values. These
power-on values may be different from the previous values that existed before
the module was reset. Therefore, new output commands must be set to return all
output values to their desired states.
(3) When the host watchdog is enabled and the host is malfunction, all output values
will change to their safe values and module status will change to 0x04. If the module
status is 0x04, all output command will be ignored until the module status is cleared
using the ~AA1 command (see sec3.23). Therefore an ~AA1 command must be sent
before any new output command are sent to return all output values to their desired
states.

Syntax:
~AA5P[chk](CrLf)  sets the power-on value
~AA5S[chk](CrLf)  sets the safe value
~
Delimiter character
AA
2-character module address in HEX format. The valid range is from 00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response : valid command  !AAV[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
V
D0=DO0, D1=DO1, D2=DO3, D3=DO4, D4=DO5
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7521 module is 01)
command: ~015P(CrLf)
Set the power-on value to DO-1/2/3 all
response: !017(CrLf)
ON
command: ~025S(CrLf)
response: !020(CrLf)
Sets the safe value to DO-1/2/3 all OFF
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5.3.30 $AAU
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads data from the RS-232 COM port buffer.
There is 1Kb queue buffer for its local RS-232 device. All input data from RS-232 COM
port can be stored in the queue buffer until the Host PC has time to read it. These features
allow the Host PC to be linked to thousands of RS-232 devices without any loss of data.
Any RS-232 device should obey the rules of the request-reply protocol. In other words,
RS-232 devices are passive. If they do not receive any commands, they will not send
any messages out. However, since active devices are frequently developed, ICPDAS
controllers are designed with a buffer to receive these messages in situations such as
this.
Buffer operation rules:
Rule 1: The buffer is enabled after being powered-on.
Rule 2: The (delimiter) AA command (Refer to Sec.5.3.10) disables the buffer operation
for that port
Rule 3: After disabling the buffer, the controller will wait for X seconds (=timeout1, refer
to Sec.5.3.33) for a response from the RS-232 device. The response will then be
transfered to COM2. If no message is received, the buffer will be re-enabled.

Syntax:
$AAU[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response :
valid command  (data)[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  The buffer is empty, syntax error or communication error, or
address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example:
Command:
Response:
Command:
Response:
Command:
Response:
$01U(CrLf)
data1(CrLf)
$01U(CrLf)
data2
$02U(CrLf)
Retrieves “data1” from the buffer of the
port that is addressed 01
Retrieves another data: “data2” from the
buffer of the port that is addressed 01
No data in the buffer of the port that is
addressed 02
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
Note:
(1) If the messages from the RS-232 device includes an End Character (refer to Sec.
5.3.12), set the “fit CrLf mode” for the RS-232 port before sending the $AAU
command. If the CrLf mode of the RS-232 port is 4, all messages in the buffer can
be read at one time, regardless of the End Character of the messages. If the “fit
CrLf mode” is set to either 0,1, 2 or 3, the messages will be read individually.
(2) If the End Character of the message from the RS-232 device is 0x0D, only CrLf
mode = 0 or CrLf mode = 4 can be set. Changing to other CrLf modes will corrupt
the integrity of the unread data in the buffer.
(3) Repeat this command several times to ensure that the buffer is empty (CrLf
mode=0/1/2/3).
(4) There are two mode for “$AAU” to read com port ring buffer.
First mode: Read all data at one time.
a. Assume barcode sends data three times. First is “789(CR)”, second is “qwe(CR)”, three is
“GHJ(CR)”. “(CR)” is 0x0D.
b. The CrLf mode of Com1 is 4. Refer to Sec.5.3.12 about command “$AATN[CrLfmode]”.
c.
The CrLf mode of Com2 is 4.
d. PC sends “$01E1” to enable COM1 prefixed address function.
e. PC sends command “$01U” will read all data at one time.
The data is “!01789(CR)qwe(CR)GHJ(CR)”.
PC
I-7524
$01U
Com2
789(CR)
qwe(CR)
GHJ(CR)
Com1
!01789(CR)qwe(CR)GHJ(CR)
Second mode:
Read the data individually
a. Assume barcode sends data three times. First is “789(CR)”, second is “qwe(CR)”, three is
“GHJ(CR)”. “(CR)” is 0x0D.
b. The CrLf mode of Com1 is 0. Refer to Sec.5.3.12 about command “$AATN[CrLfmode]”.
c. The CrLf mode of Com2 is 4.
d. PC sends “$01E1” to enable COM1 prefixed address function.
e. PC sends command “$01U(CR)” will read one data one time.
First time, send “$01U”  Get the data “!01789(CR)”
Second time, send “$01U”  Get the data “!01qwe(CR)”
Third time, send “$01U”  Get the data “!01GHJ(CR)”
PC
I-7524
789(CR)
$01U(CR)
Com2
qwe(CR)
GHJ(CR)
Com1
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5.3.31 $AAL[data]
For: I-7522A

Description:
This function will write data to the expansion board DO 0/1/2/3
Note: Supported by the firmware version 3.01 and upward.

Syntax:
$AALbbbb[chk](CrLf)
$AALcb[chk](CrLf)
$AALh[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
0
1
2
3
b Set to On Set to Off
c DO0(pin25) DO1(pin26) DO2(pin27) DO3(pin28)
Pin assignment refers to Sec.1.4
h
4-bit DO value in HEX format. DO0 is at LSB. The valid values are 0~9,
a~f and A~F.
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response: valid command  !AA[chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7522A module is 01)
command: $01L1000(CrLf)
Sets DO3=ON, DO2, DO1, DO0=0
response: !01 (CrLf)
command: $01L21(CrLf)
Sets DO2=ON, other DOn values are
response: !01 (CrLf)
unchanged.
command: $01L30(CrLf)
Sets DO3=OFF, other DOn values are
response: !01 (CrLf)
unchanged.
command: $01LE(CrLf)
Sets DO0=OFF, DO1, DO2, DO3=ON
response: !01 (CrLf)
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
Note:
If the host fails, the $AAL command will be ignored, and the response string will be !
(In normal situations, the response string will be !AA)
PWR 24
DO0~3 25
28
GND 23
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5.3.32 $AAR
For: I-7522A

Description:
This function reads the expansion board DI0(pin25), DI1(pin26), DI2(pin27), DI3(pin28).
Note: Supported by the firmware version 3.01 and upward.

Syntax:
$AAR[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
valid command
 !AAS[chk](CrLf)
invalid command
 ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
S
4-bit DI value in HEX format. DI0 is at LSB. The valid values are
0~9,a~f and A~F.
DI=low0
DI=high1
DI floating will return a High
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7522A module is 01)
DIx(pin
DI019~22
pin 19
+20V
DI1 pin 20
DI2 pin 21
DI3 pin 22
command: $01R(CrLf)
response: !015(CrLf)
Not connected
-5V
DI3, DI1=low(0), DI2, DI0=high(1)
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5.3.33 $AAJN[timeout]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
The function reads/sets the delay time before determining whether the end of a
command/response has been sent/received
$AAJN [chk] (CrLf)Reads the timeout value
$AAJN[timeout] [chk] (CrLf)Sets the timeout value
Note: Supported by the firmware version 3.0 and upward.

Syntax:
$AAJN[timeout] [chk] (CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
N=0
COM 2 timeout0
N=1
COM 1/3/4/5/6/7/8 timeout1
N=2
COM 1/3/4/5/6/7/8 timeout2
[timeout] Delay time value (ms). Valid range is 0 to 4294967259.
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

valid command  !AA[timeout value][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response buffer is empty, syntax error, communication error, address error
!
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
AA
2-character module address in HEX format
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Example: (Assume the AA address value of the I-7522 module is 01)
command: $01J01000(CrLf)
Sets the timeout value for the RS-485(COM 2 ) to 1000ms
response:
!01(CrLf)
command: $01J11500(CrLf) Sets the timeout value of the RS-232(COM 1) to 1500ms
response:
!01(CrLf)
command: $01J1(CrLf)
Reads the timeout1 value of COM1
response:
!011500(CrLf) The timeout1 value of COM1 is 1500ms.
Response :
The default timeout1 value for all RS-232 COM ports is 1000ms.

Notes:
RS-485: timeout0
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[A] Only valid when CrLf mode=4 is used.
[B] When CrLf mode is set to 4, that is no command END character, the I-752N
modules must wait for a specific time period (timeout0) without receiving any
further data in order to determine the end of the command.
RS-232: timeout1, timeout2
[A] When data is sent from the command port (RS-485) is required to be
passed to the RS-232 port, the I-752N modules will send the data to the RS-232
port and wait for a response from the RS-232 port.
(a) If no response has been received before the "timeout1" period has elapsed,
then the module will stop waiting.
(If the RS-232 port is not in wait mode and the I-752N modules
receive data from that port, the data will be sent to the buffer of that
port. The data can then be read using the "$AAU" command.)
(b) If any data is received before the timeout1 period has elapsed,
(1) If CrLf mode=0~3, any response data received will be send to the command
port (RS-485) after the I-752N modules receive the END character. However,
if the “timeout1” period elapsed and the I-752N modules still haven’t
received the END character, and the "timeout2" period has elapsed without
receiving any further data, then the I-752N modules will send the received
data to the COMMAND port.
(2) If CrLf mode=4, the I-752N modules will wait for "timeout2" to elapse
without receiving any more data, then will send the received data to the
COMMAND port.
[B] "timeout1", begins when the I-752N modules start to send the bypass data to
RS-232 port, so the command transmission time from I-752n to RS-232 device
must also be considered.
[C] For "timeout2", begins at when RS-232 COM port receives one character and
restarts to count “timeout2” until next character is received.
The user must consider the buffer trigger level setting of the UART (COM1 with
only a byte buffer, COM3 or later using 16c550 with a 16 byte FIFO, the default
trigger level is set to 8. The trigger level can be set using the "$AAG1N"
command, N can be either "1," "4," "8" or "14."
[D]The timeout1must be greater than timeout2.
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5.3.34 $AAGN[triggerlevel]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the Trigger Level
$AAGN[chk](CrLf)  Reads the Trigger Level
$AAGN[Trigger Level][chk](CrLf)  Sets the Trigger Level
Note: Supported by the firmware version 3.0 and upward.

Syntax:
$AAGN[trigger level][chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
[Trigger Level]: 1/4/8/14 (COM3/4/5/6/7/8 only)
N=0
Reads/Sets the Trigger Level of the COM 2
N=1
Reads/Sets the Trigger Level of the COM 1/3/4/5/6/7/8
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
!
?
AA
[chk]
(CrLf)
valid command  !AA[trigger level][chk](CrLf)
invalid command  ?AA[chk](CrLf)
no response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character module address in HEX format
2-character checksum. If the checksum is disabled  no [chk]
End Character

Example: (Assume the AA address value of the I-7523 module is 01)
command: $01G0(CrLf)
Reads the trigger level of COM2 is 1
response:
!011(CrLf)
command: $02G14(CrLf)
Sets the trigger level of COM3 to 4
response:
!02(CrLf)
command: $01G18(CrLf)
only COM3/4/5/6/7/8 can be set
response :
?01(CrLf)

Note:
The Trigger Level for COM1 and COM2 can’t be changed.
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5.3.35 @AA[data]
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the onboard DI 1/2/3/4/5 and DO 1/2/3/4/5 values
@AA  Reads the onboard DI 1/2/3/4/5 and DO 1/2/3/4/5
@AAh  Sets the onboard DO 1/2/3 for the 7521/7522/7523 modules
@AAhh  Sets the onboard DO 1/2/3/4/5 for the 7523A/7522A/7524/7527 modules
Note: Supported by the firmware version 3.0 and upward.

Syntax:
@AA[chk](CrLf)
@AAh[chk](CrLf)
@AAhh[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
h
4-bit DO value in HEX format. DO1 is set at LSB. The valid values is
0~9, a~f , A~F
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
@AA
valid command  >AAbbcc[chk](CrLf)
invalid command
 ?[chk](CrLf)
no response  syntax error, communication error, or address error
>
Delimiter character indicating a valid command
AA
2-character module address in HEX format
bb
2-character hex value of DO. DO1 is at LSB. Valid value is from 00
to FF
cc
2-character hex value of DI. DI1 is at LSB. Valid value is from 00 to
FF
DI=low0
DI=high1
DI floating will get High
DO=1
on
DO=0
off
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character
@AAh/hh valid command  >[chk](CrLf)
invalid command  ?[chk](CrLf)
no response  syntax error, communication error, or address error
>
Delimiter character indicating a valid command
?
Delimiter character indicating an invalid command
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character
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
Example: (Assume the AA address value of the I-7522A module is 01)
command: @0108(CrLf)
Sets DO1=OFF, DO2=OFF, DO3=OFF,
DO4=ON,
response:
>(CrLf)
DO5=OFF
Reads DO1=OFF, DO2=OFF, DO3=OFF,
command: @02
DO4=ON,
response:
>02081F(CrLf) DO5=OFF, DI1=high(1), DI2=high(1),
DI3=high(1), DI4=high(1), DI5=high(1),
(Assume the AA address value of the I-7521 module is 01)
DI1=high(1),
command: @017
Sets DO1=ON, DO2=ON, DO3=ON
response:
>(CrLf)

Note:
If the host fails, the @AAh/hh command will be ignored and the
response string will be“!.” (In normal situations, the response string will
be “>” )
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5.3.36 #AABBHH
For: I-7521/I-7522/I-7522A/I-7524/I-7527

Description:
The function sets the multiple onboard DO-1/2/3/4/5 values.
(I-7522A pin assignment refers to Sec.1.4)
Note: Supported by the firmware version 3.0 and upward.

Syntax:
#AABBHH[chk](CrLf)
#
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
BB
00/0A
HH
2-character DO value in HEX format. DO1 is set at LSB. The valid
value range is from 00 to FF
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
>
?
[chk]
(CrLf)

Example: (Assume the AA address value of the I-7521 module is 01)
command: #010003(CrLf)
Sets DO1=ON, DO2=ON, DO3=OFF
response:
>(CrLf)
command:
response:

valid command  >[chk](CrLf)
invalid command  ?[chk](CrLf)
no response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character checksum. If the checksum is disabled  no [chk]
End Character
#010A02(CrLf)
>(CrLf)
Sets DO1=OFF, DO2=ON, DO3=OFF
Note:
If the host fails, the #AABBHH command will be ignored and the
response string will be “!.” (In normal situations, the response string will
be “ >”)
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5.3.37 #AABCDD
For: I-7521/I-7522/I-7522A/I-7524/I-7527

Description:
This function sets the single onboard DO-1/2/3/4/5 values.
(I-7522A pin assignment refers to Sec.1.4)
Note: Supported by the firmware version 3.0 and upward.

Syntax:
#AABCDD[chk](CrLf)
#
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
B
1/A
C
0  DO1, 1  DO2, 2  DO3,
3  DO4, 4  DO5
DD
00  OFF, 01  ON
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
>
?
AA
[chk]
(CrLf)


valid command
 >[chk](CrLf)
invalid command  ?[chk](CrLf)
no response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character module address in HEX format
2-character checksum. If the checksum is disabled  no [chk]
End Character
Example: (Assume the AA address value of the I-7521 module is 01)
command:
response:
#011201(CrLf)
>(CrLf)
Sets DO3=ON
command:
response:
#01A000(CrLf)
>(CrLf)
Sets DO1=OFF
Note:
If the host fails, the #AABCDD command will be ignored and the
response string will be “!.” (In normal situations, the response string will
be “>”)
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5.3.38 $AAEV
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the status of the prefixed address byte on the response,
which lets the host know RS-232 device the response comes from.
Note: Supported by the firmware version 3.05 and upward.

Syntax:
$AAEV[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
V=0
Prefixed address byte disabled
V=1
Prefixed address byte enabled
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
valid command
!AA[V] [chk](CrLf)
invalid command  ?[chk](CrLf)
No response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character module address in HEX format
Prefixed address byte disabled
Prefixed address byte enabled
2-character checksum. If the checksum is disabled  no [chk]
End Character
!
?
AA
V=0
V=1
[chk]
(CrLf)


Example: (Assume the AA address value of the I-7521 module is 01)
command:
response:
$01E(CrLf)
!010(CrLf)
Reads the status of the prefixed address byte for COM1.
The prefixed address byte is disabled.
command:
response:
$01E1(CrLf)
!01(CrLf)
Sets the status of the prefixed address byte to enabled.
Note:
If the prefixed address byte is enabled, the response for [delimiter]AA[bypass data]
and $AAU will be prefixed with !AA.
Example 1:
[delimiter]AA[bypass data]
Command: :01TEST(Cr)
Bypass: TEST(Cr)
I-7521
Response: !01ABCD(Cr)
device
Response: ABCD(Cr)
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Example 2: $AAU
Command: $01U(Cr)
I-7521
Response: !01ABCD(Cr)
device
Data: ABCD(Cr)
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5.3.39 $AAHV
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function reads/sets the mode of bypassing the data string to COM2.
When this function is enabled, the data from the COM1/3/4/5/6/7/8 will be sent to COM2
directly.
Note: Supported by the firmware version 3.08 and upward.

Syntax:
$AAHV[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
V=0
Disable the mode for bypassing the data string to COM2.
V=1
Enable the mode for bypassing the data string to COM2.
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
valid command
!AA[V] [chk](CrLf)
invalid command  ?[chk](CrLf)
No response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character module address in HEX format
The mode for bypassing the data string to COM2 is disabled.
The mode for bypassing the data string to COM2 is enabled.
2-character checksum. If the checksum is disabled  no [chk]
End Character
!
?
AA
V=0
V=1
[chk]
(CrLf)


Example: (Assume the AA address value of the I-7522 module is 01)
command:
response:
$02H1(CrLf)
!02(CrLf)
Set the mode of COM3 to enable.
command:
response:
$02H(CrLf)
!021(CrLf)
Read the mode of COM3.
The mode is enabled.
Note:
1. Example : Assume the mode of COM4 of I-7523 is enabled. I-7523 will bypass the
data “ABCD(Cr)” to COM2 directly.
RS485
Bypass data: ABCD(Cr)
RS232
I-7523
COM2
RS-232 device
COM4
Data: ABCD(Cr)
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2. When the mode is enabled, please note the communication of COM2 because the
COM2 is connected to RS-485 network. The RS-485 network is half-duplex.
3. The command can cooperate with the command “$AAEV”.
Assume the AA address value of the I-7523 module is 01.
Set COM1: $01E1  Enable the mode of the prefixed address byte on the response.
$01H1 Enable the mode of bypassing the data string to COM2.
Set COM3: $02E1  Enable the mode of the prefixed address byte on the response.
$02H1 Enable the mode of bypassing the data string to COM2.
Assume the data “ABCD(Cr)” is quicker than data “1234”.
Data: ABCD(Cr)
I-7523
COM1
RS-232device
COM3
RS-232device
COM2
Bypass data:
!01ABCD(Cr) !021234
Data: 1234
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5.3.40 $AAIV
For: I-7521/I-7522/I-7522A/I-7523/I-7524/I-7527

Description:
This function will restore the system to factory default setting right now.
Note: Supported by the firmware version 3.08 and upward.

Syntax:
$AAIV[chk](CrLf)
$
Delimiter character
AA
2-character module address in HEX format. The valid range is from
00 to FF
V=1
Enable the mode for restoring factory default setting.
[chk]
2-character checksum. If the checksum is disabled  no [chk]
(CrLf)
End Character

Response:
!
?
AA
[chk]
(CrLf)


valid command
!AA[chk](CrLf)
invalid command  ?[chk](CrLf)
No response  syntax error, communication error, or address error
Delimiter character indicating a valid command
Delimiter character indicating an invalid command
2-character module address in HEX format
2-character checksum. If the checksum is disabled  no [chk]
End Character
Example: (Assume the AA address value of the I-7522 module is 01)
command:
response:
$02I1(CrLf)
!02(CrLf)
Restore to factory default setting for all com ports.
command:
response:
$01I1(CrLf)
!01(CrLf)
Restore to factory default setting for all com ports.
Note:
Please refer to the beginning of Sec.3 “Quick Start” for factory default setting.
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Chapter 6
Applications
6.1. Cnnecting to the HP34401A
6.1.1 Connect the I-752N module to the HP34401A
The stop-bit of the HP34401A must be set as two stop-bits. The
COM1/COM3 port of the I-7522 module and COM1/COM3/COM4 port
of the I-7523 module can support two stop-bits, so they can be linked
to the HP34401A. The I-7522 module can be linked to a single
HP34401A. The I-7523 module can be linked to two HP34401As.
Please refer to Section 6.1.2 ~ 6.1.6 for more information.
6.1.2 Connecting a PC to the HP34401A
A PC can be linked to the HP34401A using either COM1 or COM2 as
below:
RS-232
Host PC
PC COM port
TxD(3)
RxD(2)
DTR(4)
DSR(6)
GND(5)
HP34401A (RS-232)
Multimeter
TxD(3)
RxD(2)
DTR(4)
DSR(6)
GND(5)
The default settings of the HP34401A are as follows:
 Baud Rate=9600
 Data-bit=7
 Parity-bit=EVEN
 Stop-bit=2
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 TxD: send commands to the RS-232 HOST
 RxD: receive commands from the RS-232 HOST
 DTR: Set the HP34401A as active HIGH to enable the RS-232
HOST to send commands
 DSR: Set the RS-232 HOST as active HIGH to enable the HP34401A
to send the results back to the RS-232 HOST
The demo program, hp34401a.c, is designed to allow a Host PC to be
connected to an HP34401A. Refer to the companion CD for the source
code of the hp34401a.c file. The flow chart illustrating the functionality
of the hp34401a.c file is shown below:
start
Set the multimeter
to remote-control
mode
Any key
pressed?
Y
Set the multimeter
back to local mode
N
Ask for
measuring
Acquire
reading
end
Note: the PC COM port should be 16550 compatible.
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6.1.3 Connecting a single I-7522 to a single HP34401A
The diagram below shows how to connect a single PC to a remote
HP34401A on an RS-485 network. The I-7520 module is used to
convert the RS-232 signal from PC to an RS-485 signal. The I-7522
module is used as an “Addressable RS-232 converter” for the
HP34401A since there is no address setting in the HP34401A.
I-7520
RS-232
RS-485
Host PC
I-7522
HP34401A (RS-232)
HP34401A
RS-232 port
DSR
GND
TxD
RxD
7522
9
8
7
6
5
4
3
2
1
GND
24V
RS-485D+
RS-485D-
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The demo program, hp22_1.c, is designed to allow a Host PC to be
linked to a remote HP34401A. Refer to the companion CD for the
source code of the hp22_1.c file. The key features of hp22_1.c are as
follows:
 The RTS3 pin of COM3 port must first be set as active HIGH to
enable the HP34401A.
 A flow chart illustrating the functionality of the hp22_1.c file is
shown below:
start
Set the multimeter
to remote-control
mode
Any key
pressed?
Y
Set the multimeter
back to local
mode
N
Ask for
measuring
end
Acquire
reading
Note: the PC COM port should be 16550 compatible.
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6.1.4 Connecting multiple I-7522 modules and multiple
HP34401A
The diagram below shows how to connect a single PC to multiple
remote HP34401As on an RS-485 network. The I-7520 module is
used to convert the RS-232 signal from the PC to an RS485 signal.
The I-7522 module is used as an “Addressable RS232 converter”
for the HP34401A, since there is no address setting on the
HP34401A.
Each I-7522 module has a unique address on the RS485 network.
Each HP34401A shares the same address-range as its
corresponding I-7522 module, which allows each HP34401A to
have a unique address in this configuration.
I-7520
RS-232
RS-485
Host PC
I-7522 #1
HP 34401A (RS-232)
#2
I-7522 #3
HP 34401A (RS-232)
#4
I-7522 #5
HP 34401A (RS-232)
#6
The demo program, hp22_m.c, is designed to allow a Host PC
to be linked to a remote HP34401A. Refer to the companion CD
for the source code of the hp22_m.c file. The key features of
hp22_m.c are as follows:
 The configuration of the COM port on the I-7522 module is as
follows:
Baud Rate
Parity
Data
Stop-bit
COM2 (485)
9600 (default)
None (default)
8 (default)
1 (default)
COM3 (232)
9600 (default)
Even
7
2
 The RTS3 pin of the COM3 port on each module must first be
set as active HIGH to enable the HP34401A.
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 The address mapping for this configuration is as follows:
I-7522 NO.
#1
#3
#5
I-7522 Address
01h
03h
05h
HP NO.
#2
#4
#6
HP34401A Address
02h
04h
06h
 A flow chart illustrating the functionality of the hp22_m.c file is
as follows:
start
Set the
multimeters
to
remote-contr
ol mode
Any key
pressed?
N
Y
key ’q’or ’Q’
pressed?
Y
Set the
multimeter
back to local
mode
end
N
Request
multimeter
command
Send the
command to
multimeter
Receive a
response from
the multimeter
 Execution examples:
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6.1.5 Connecting a single I-7523 modules and two
HP34401A
The following diagram below shows how to connect a single PC
connected to two remote HP34401As on an RS-485 network. The
I-7520 module is used to convert the RS-232 signal from to PC to
an RS-485 signal. The I-7523 module is used as an “Addressable
RS-232 converter” for the HP34401A, since there is no address
setting on theHP34401A. Two HP34401A can be connected to a
single I-7523 module.
RS-232
I-7520
RS-485
Host PC
I-7523
HP34401A #1 (RS-232) HP34401A #2 (RS-232)
7523
GND
24V
HP34401A #1
RS-232 port
DSR
GND
TxD
RxD
HP34401A #2
RS-232 port
9
8
7
6
5
4
3
2
1
DSR
GND
TxD
RxD
9
8
7
6
5
4
3
2
1
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The demo program, hp23_1.c, is designed to allow a Host PC
to be linked to a remote HP34401A. Refer to the companion CD
for the source code of the hp23_1.c file. The key features of
hp23_1.c are as follows:
 The RTS3 pin of COM3 port on each module must first be set
as active HIGH to enable the HP34401A.
 The configuration of the COM ports on the I-7523 module is
as follows:
COM2 (485)
COM3 (232)
COM4 (232)
Baud Rate
9600 (default)
9600 (default)
9600 (default)
Parity
None (default)
Even
Even
Data
8 (default)
7
7
Stop-bit
1 (default)
2
2
 The address mapping for this configuration is given as
follows:
I-7523 Address
Corresponding COM3
Corresponding COM4
address
address
01h
02h
03h

The InitHP() and CloseHP() function of hp23_1.c are as
follows:
void InitHP(int ComNo)
{
com[ComNo].ComNo = ComNo;
com[ComNo].BaudRate = 9600L;
com[ComNo].DataFormat = Data8bit + NonParity + Stop1bit;
com[ComNo].CheckSum = CHKSUMdisable;
OpenCOM(ComNo);
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
WaitClock(18);
":02SYST:REM");
":02*CLS");
":03SYST:REM");
":03*CLS");
// #1 HP
// #1 HP
// #2 HP
// #2 HP
void CloseHP(int ComNo)
{
HPSendCommand(ComNo, ":02*CLS");
HPSendCommand(ComNo, ":02SYST:LOC");
HPSendCommand(ComNo, ":03*CLS");
HPSendCommand(ComNo, ":03SYST:LOC");
CloseCOM(ComNo);
}
// #1 HP
// #1 HP
// #2 HP
// #2 HP
}
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6.1.6 Connecting multiple I-7523 modules and multiple
HP34401A
The diagram below shows how to connect a single PC to multiple
remote HP34401As on an RS-485 network. The I-7520 module is
used to convert the RS-232 signal from to PC to an RS-485 signal.
The I-7523 module is used as an “Addressable RS-232 converter”
for the HP34401A, since there is no address setting on the
HP34401A. Two HP34401As can be connected to a single I-7523
module.
Each I-7523 module has a unique address on the RS-485 network.
Each HP34401A shares the same address range as its
corresponding I-7523 module, which allows each HP34401A to
have a unique address in this configuration.
I-7520
RS-232
RS-232
Host PC
I-7523
HP34401A (RS-232) address=02h
HP34401A (RS-232) address=03h
address=01h
RS-485
HP34401A (RS-232) address=05h
I-7523
HP34401A (RS-232) address=06h
address=04h
HP34401A (RS-232) address=08h
I-7523
HP34401A (RS-232) address=09h
address=07h
The demo program, hp23_M.c, is designed to allow a Host PC
to be linked to remote HP34401A. Refer to the companion CD for
the source code of hp23_M.c file. The key features of hp23_M.c
are as follows:
 The RTS3 pin of the COM3 port on each module must first be
set as active HIGH to enable the HP34401A.
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 The configuration of the COM ports on each I-7523 module is
as follows:
COM2 (485)
COM3 (232)
COM4 (232)
Baud Rate
9600 (default)
9600 (default)
9600 (default)
Parity
None (default)
Even
Even
Data
8 (default)
7
7
Stop-bit
1 (default)
2
2

The InitHP() and CloseHP() functions of hp23_M.c are given as
follows:
void InitHP(int ComNo)
{
com[ComNo].ComNo = ComNo;
com[ComNo].BaudRate = 9600L;
com[ComNo].DataFormat = Data8bit + NonParity + Stop1bit;
com[ComNo].CheckSum = CHKSUMdisable;
OpenCOM(ComNo);
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
HPSendCommand(ComNo,
WaitClock(18);
":02SYST:REM");
":02*CLS");
":03SYST:REM");
":03*CLS ");
":05SYST:REM");
":05*CLS ");
":06SYST:REM");
":06*CLS ");
":08SYST:REM");
":08*CLS ");
":09SYST:REM");
":09*CLS ");
}
void CloseHP(int ComNo)
{
HPSendCommand(ComNo, ":02*CLS");
HPSendCommand(ComNo, ":02SYST:LOC");
HPSendCommand(ComNo, ":03*CLS");
HPSendCommand(ComNo, ":03SYST:LOC");
HPSendCommand(ComNo, ":05*CLS");
HPSendCommand(ComNo, ":05SYST:LOC");
HPSendCommand(ComNo, ":06*CLS");
HPSendCommand(ComNo, ":06SYST:LOC");
HPSendCommand(ComNo, ":08*CLS");
HPSendCommand(ComNo, ":08SYST:LOC");
HPSendCommand(ComNo, ":09*CLS");
HPSendCommand(ComNo, ":09SYST:LOC");
CloseCOM(ComNo);
}
// #1 HP
// #1 HP
// #2 HP
// #2 HP
// #3 HP
// #3 HP
// #4 HP
// #4 HP
// #5 HP
// #5 HP
// #6 HP
// #6 HP
// #1 HP
// #1 HP
// #2 HP
// #2 HP
// #3 HP
// #3 HP
// #4 HP
// #4 HP
// #5 HP
// #5 HP
// #6 HP
// #6 HP
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6.2. Typical Applications
Application 1: Addressable RS-232 Controller (Command Type)
 Each I-7521 module has a unique address
 The Host PC first sends a command to all I-7521 module
 The destination I-7521 module will pass the command to its local
RS-232 device
 The destination I-7521 module will then send the response from the
RS-232 device back to the Host PC
 Refer to the 7521.c file for the source code of the firmware
I-7520
RS-232
RS-485
Host PC
I-7521
(#01)
HP34401A
I-7521
(#02)
HP34401A
I-7521
(#AA)
HP34401A
Application 2: Addressable RS-232 Controller (Receive Data only
Type)-Barcode Reader1
 The barcode-reader can scan a barcode at anytime, and the I-7521
module will store these barcodes in an internal buffer (1K bytes)
 The Host PC first sends $AAU command to all I-7521 modules. The
destination I-7521 module will check its internal buffer. If there are any
barcodes in the buffer, the I-7521 module will then send a single
barcode back to the Host PC.
 The Host PC can send more $AAU commands to read each barcode
stored in the internal buffer of the I-7521 module
 Refer to the 7521.c file for the source code of the firmware
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Application 3: Bypass data to COM2-Barcode Reader2
 I-7524 module address is 01,02,03,04
 PC sends “$01E1”, “$02E1”, “$03E1”, “$04E1” to enable “prefixed
address byte” function.
 PC sends “$01H1”, “$02H1”, “$03H1”, “$04H1” to enable “bypass to
COM2” function.
 The barcode sends data to I-7524. I-7524 will directly bypass the data to
COM2 right now.
For example:
(1) The barcode sends “ABCD” to COM1.
(2) I-7524 sends “ABCD” to COM2 and adds prefixed address “!01”
directly.
(3) PC receives “!01ABCD” data.
PC
RS-232
ABCD
I-7520
I-7524
Adress: 01
Com1 ring buffer1
RS-485
abcd
Com2
!01ABCD
/!02abcd
/!031234
/!04A1B3
Adress: 02
Com3 ring buffer1
Adress: 03
Com4 ring buffer1
Adress: 04
Com5 ring buffer1
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A1B3
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Application 4: Addressable RS-232 Controller (Three channels)
 Each I-7523 module has a unique address
 Each I-7523 module can support three RS-232 devices, AA, AA+1 and
AA+2
 The Host PC first sends a command to all I-7523 module
 The destination I-7523 module will pass the command to its local
RS-232 device 1, RS-232 device 2 or RS-232 device 3.
 The I-7523 module then sends the response from the RS-232 device
back to the Host PC
 COM4 port of the I-7523 module can support either 1 or 2 stop bits, so it
can support a two stop-bit device, such as the HP34401A.
 The RS-232 device can be used for command (Application 1) or null
command (Application 2) type controller applications
 Refer to the 7523.c file for the source code of the firmware
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Application 5: Real time DI Monitoring and DO Alarm (Master
type)
 Refer to Applications 1 and 2 for more information
 The I-7521 module will scan and analyze the onboard DI. If the DI shows
a match with the alarm states, the onboard DO will trigger the alarm
device to allow for alarm or safety control
 All DI and DO control operations are performed in the I-7521 module.
The Host PC only reads the DI and DO values as part of its system
monitoring function
 Refer to the 7521ODM1.c file for the source code of the firmware
I-7520
RS-232
RS-485
I-7521
(#01)
DI
I-7521
(#AA)
DI
DO
RS-232 Device
DO
RS-232 Device
Application 6: Real time A/D Monitoring and D/A Control
(Master type)
 Refer to Applications 1 and 2 for more information
 An X301 daughter board supports a single A/D and a single D/A and can
be connected the I-7521 module. The I-7521+X301 combination can read
and analyze the A/D in real time. The D/A output is controlled based on
the A/D value
 All A/D and D/A control operations are performed in the I-7521 module.
The Host PC only reads the A/D and D/A values as part of its system
monitoring functions
 Refer to the 7521ODM2.c file for the source code of the firmware
RS-232
I-7520
RS-485
I-7521
(#01)
I-7521
(#AA)
D/A
A/D
RS-232 Device
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D/A
RS-232 Device
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Application 7: 8-channel long term event counters (Master type)
 Refer to Applications 1 and 2 for more information
 The X100 daughter supports 8 DI channels. The I-7521+X100
combination can read and analyze the 8 event counters in real time.
The timing diagram of the event-counter will be latched until a clear
command is sent by the Host PC
 All analysis operations are performed in the I-7521 module. The Host
PC only reads the timing values of the event counter as past of its
system monitoring functions
 Refer to the 7521ODM3.c file for the source code of the firmware
I-7520
RS-485
RS-232
I-7521
(#01)
I-7521
(#AA)
X8
X8
Event Counter
Event Counter
RS-232 Device
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Application 8: Multiplex Control (Master type)
 Refer to Applications 1 and 2 for more information
 The onboard DO of the I-7521 module can directly drive a relay. The
onboard DI can be linked to photo sensors to allow for event triggering.
The I-7521+DN-PR4 can be triggered by a photo-sensor and can control
the multiplex to select the expected analog signal
 All control operations are performed in the I-7521 module. The Host PC
is able to read the 3-channel A/D signals without requiring the multiplex
control
 Refer to the 7521ODM4.c file for the source code of the firmware
I-7520
RS-232
RS-485
photo sensor
I-7521
(#01)
photo sensor
I-7521
(#AA)
D/I
D/I
RS-232
device
RS-232
device
D/O
D/O
DN-PR4
DN-PR4
A/I
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Application 9: Real time Analog Signal Monitoring and Alarm
Control (Master type)
 Refer to Applications 1 and 2 for more information
 COM1 of the Host PC is used as the Host RS-485 network. The Host PC
will send commands and receive responses through the RS-485
network
 COM2 of the Host PC is used as an emergency RS-485 network. All
I-7522 modules will automatically monitor the analog signal connected
to an HP34401A. If an emergency event occurs, the I-7522 module will
send an emergency command to this RS485 network. If multiple I-7522
modules send emergency commands to the Host PC at the same time,
the I-7522 modules will continue to send emergency commands to the
Host PC until confirmation is received from the Host PC
 All analysis operations are performed in the I-7522 module. The Host
PC only reads the analog values as part of its system monitoring
function
 Refer to the 7522ODM5.c file for the source code of the firmware
RS-232 I-7520
COM1
Host RS-485 Network
COM2
COM2 RS-232
I-7520
COM1
COM3
COM2
COM1
I-7522
(#01)
HP34401A
COM3 I-7522
(#AA)
HP34401A
Emergency RS-485 Network
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Appendix A MiniOS7 Utility
The MiniOS7 Utility program provides three main functions:
 Allows the MiniOS7 image to be upgraded
 Allows program files to be downloaded to the Flash Memory
 Allows the COM port settings to be configured
Location of the MiniOS7 utility:
The MiniOS7 utility is located in:
CD: \NAPDOS\MINIOS7\UTILITY \MiniOS7_utility\
minios7_utility_v311.exe
or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/minios7/utility
/minios7_utility/minios7_utility_v311.exe
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Appendix B
7188XW.EXE
The 7188xw.exe file is the main utility for I-752N(D) modules;
7188xw.exe can be used as follows:
 Download the user program files from the Host PC to the
memory unit of the I-752N(D) module.
 Download the MiniOS7 image file from the Host PC to the
Flash Memory of the I-752N(D) module and upgrade MiniOS7.
 Enter data into the I-752N(D) module using the keyboard of the
Host PC
 Show the data from the I-752N(D) modules.
Location of the 7188xw.exe file
CD:\Napdos\MiniOS7\utility\
or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/minios7/utility/
For more information about 7188xw, refer to the
CD:\Napdos\MiniOS7\document\Lib_Manual_For_7188XABC\index.h
tm
or http://ftp.icpdas.com.tw/pub/cd/8000cd/napdos/minios7/document/
lib_manual_for_7188e/eng/index.htm
Downloading files to the I-752N(D) modules
Step 1: Connect the I-752N module to the Host PC (Refer to Sec. 1.6.1).
Step 2: Connect the INT* pin to the GND pin to disable autoexec.bat before
turnning on the power.
Step 3: Build a folder that includes the firmware.
There are two ways to use 7188xw.exe:
a) Put the firmware (Refer to Sec. 2.2) and the 7188xw.exe file in the
same folder on the Host PC. Execute 7188xw.exe and jump to Step
8.
b) Go to Step 4
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(Refer to the companion CD: Napdos\752N\Firmware_V3 or the
release notes to find details related to the firmware.)
Step 4: Copy the 7188xw.exe file to the PATH directory, for example C:\DOS or
C:\WINDOWS, and then it will be able to be executed to allow files to be
downloaded from any location
Step 5: Execute MS-DOS in Windows as follows:
Step 6: Type d: to change to the D:\> drive
Type cd [the location of the file that will be downloaded].
For example cd 752n_c_060206 to change to the 752n_c_060206
folder
Press ENTER
The following screen will be shown on the Host PC for I-7521/22/23:
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Step 7: Select the active COM Port of the Host PC and execute
7188xw.exe
If the I-752N module is connected to COM1 on the PC, then type
7188xw/c1
If the I-752N module is connected to COM2 on the PC, then type
7188xw/c2
Press ENTER
The following screen will be shown on the Host PC for I-7521/22/23:
Microsoft Windows XP [版本 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\vic_tsai>d:
D:\>cd 752n_c_060206
D:\752n_c_060206>7188xw/c1
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS.
Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM1 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\752n_c_060206"
original baudrate = 9600!
now baudrate = 115200!
Step 8: Refer to Steps 6 to 9 of Sec 3.1 to change the
configuration for 7188xw.exe to 115200, N, 8,1
Press ENTER
……………………………
D:\752n_c_060206>7188xw/c1
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS.
Tim Tsai.]
[Begin Key Thread...]
“i7188XC>” for I-7521/I-7522/I-7523
Current set: Use COM1 115200,N,8,1
“i7188XB>” for I-7522A/I-7524/I-7527
AutoRun:
Autodownload files: None
Current work directory="D:\752n_c_060206"
original baudrate = 115200!
now baudrate = 115200!
i7188XC>
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Step 9: Type dir
Press ENTER
The following screen will be shown on the Host PC for I-7521/22/23:
………………………
7188x for WIN32 version 1.32 (2006/10/17)[By ICPDAS. Tim Tsai.]
[Begin Key Thread...]
Current set: Use COM1 115200,N,8,1
AutoRun:
Autodownload files: None
Current work directory="D:\752n_c_060206"
original baudrate = 115200!
now baudrate = 115200!
i7188XC>dir
0)autoexec.bat 11/25/2005 12:37:15
10[0000A]C002:0000-C002:000A
1)752n_c.exe
02/06/2006 15:19:11 39024[09870]C004:000A-C98B:000A
Total File number is 2 Free space=157478 bytes
i7188XC>
Step 10: Press F4 to automatically download the files (be sure that the file
7188XW.F4 and the firmware are put together).
The 7188xw will then download 752n_c.exe and autoexec.bat from the
Host PC to the module. After the download operation has been
completed, the following screen will be shown:
………………………………………
1)752n_c.exe
02/06/2006 15:19:11 39024[09870]C004:000A-C98B:000A
Total File number is 2 Free space=157478 bytes
i7188XC>del /y
Total File number is 2, do you really want to delete(y/n)?
i7188XC>LOAD
File will save to C000:0000
StartAddr-->B000:FFFF
Press ALT_E to download file!
Load file:autoexec.bat[crc=9723,0000]
Send file info. total 1 blocks
Block 1
Transfer time is: 0.125000 seconds
i7188XC>LOAD
File will save to C002:000A
StartAddr-->C000:0029
Press ALT_E to download file!
Load file:752n_c.exe[crc=7E10,0000]
Send file info. total 153 blocks
Block 153
Transfer time is: 14.391000 seconds
i7188XC>
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Step 11: Type dir and press Enter to see the downloaded files.
(752n_c.exe is for I-7521/22/23, 752n_b.exe is for I-7524/22A/27)
i7188XC>dir
0)autoexec.bat 11/25/2005 12:37:15
10[0000A]C002:0000-C002:000A
1)752n_c.exe
02/06/2006 15:19:11
39024[09870]C004:000A-C98B:000A
Total File number is 2 Free space=157478 bytes
i7188XC>
Step 12: Disconnect the INIT* pin from the GND and power-off then
power-on the I-7521/22/23/22A/24/27 module. The MiniOS7 will
automatically execute the new firmware.
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Appendix C Firmware Version information
Download a description document about firmware version information:
http://ftp.icpdas.com/pub/cd/8000cd/napdos/752n/  firmware_v3
folder  readme.txt.
The readme.txt illustrates some difference and improvement of
firmware version.
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