ICP DAS USA I-7530 User manual

I-7530 RS-232 to CAN Converter User’s Manual (Version 1.0,Aug/2004, I-7530) ------------ 1
The I
-
7530 RS
-
232 to CA
N
Converter
User’s Manual
Warranty
All products manufactured by ICP DAS are under warranty regarding
defective materials for a period of one year from the date of delivery to the
original purchaser.
Warning
ICP DAS assumes 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, or for any infringements of patents or other rights of third
parties resulting from its use.
Copyright
Copyright 1997 by ICP DAS. All rights are reserved.
Trademark
The names used for identification only may be registered trademarks
of their respective companies.

I-7530 RS-232 to CAN Converter User’s Manual (Version 1.0,Aug/2004, I-7530) ------------ 2
Table of Contents
1. Introduction..........................................................................................................3
1.1 Features.............................................................................................4
1.2 Specifications .....................................................................................4
2. Hardware...............................................................................................................5
2.1 Block Diagram....................................................................................5
2.2 Pin Assignment...................................................................................6
2.3 Hardware connection..........................................................................7
2.4 Terminator resistor settings ................................................................8
2.5 Init/Normal Dip-switch.........................................................................9
2.6 LED Indication..................................................................................10
3. Software Utility...................................................................................................11
3.1 How to configure the module parameters.........................................12
3.2 How to test the module transmission performance...........................14
4. Command list .....................................................................................................16
4.1 tIIILDD…[CHK]<CR>........................................................................17
4.2 TIIIL[CHK]<CR> ...............................................................................17
4.3 eIIIIIIIILDD…[CHK]<CR>..................................................................18
4.4 EIIIIIIIIL[CHK]<CR>..........................................................................18
4.5 S[CHK]<CR>....................................................................................19
4.6 C[CHK]<CR>....................................................................................20
4.7 P0BBDSPAE[CHK]<CR> .................................................................21
4.8 P1B [CHK]<CR>...............................................................................22
4.9 RA[CHK]<CR>..................................................................................23
4.10 General Error code for all command.................................................24
5. Troubleshooting.................................................................................................24

I-7530 RS-232 to CAN Converter User’s Manual (Version 1.0,Aug/2004, I-7530) ------------ 3
1. Introduction
CAN (Controller Area Network) is a serial bus control protocol
especially suited to structure intelligent industry devices networks and
build smart automatic control systems. Figure 1 shows the application
architecture for I-7530 modules. The PC can be the CAN host, monitor or
HMI to access/control the CAN device through the CAN network by the I-
7530 Converter. The programmable RS-232 device (For example: I-
8411/I-8431/I-8811/I-8831/W-8031/W-8331/W-8731 embedded controller)
can use the serial port to connect to the CAN network via the I-7530
module.
Figure 1: Application of I-7530
In order to use the CAN network with traditional RS-232 devices, we
provide a way to achieve this goal. Therefore, I-7530 is designed to
unleash the power of the CAN bus via the RS-232 communication method.
It accurately converts messages between CAN and RS-232 networks. It
also allows users to communicate with CAN devices easily through any
PC or devices with a RS-232 interface. The main features and
specification of this are described as below:

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1.1 Features
• Microprocessor inside with 20MHz;
• CAN interface connector: D-Sub 9-pin;
• Phillip 82C250 CAN transceiver;
• Provide One CAN and RS-232 Port;
• Built in CAN/RS-232 Converter firmware;
• Max transmission speed up to 1M bps for CAN and 115.2K bps for RS-
232 interface;
• Provide Software configuration for CAN and RS-232 communication;
• Max transmission distance over 1000m based on CAN specification;
• Support both CAN 2.0A and CAN 2.0B;
• Build-in jumper to provide 120 ohm terminal resistor or not in CAN
network;
• Provide power, data flow and error LED indicator for CAN and RS-232;
• Built-in a Dual-Watchdog function in the module;
1.2 Specifications
RS-232 feature:
• RS-232 interface connector: D-sub 9-pin female;
• RS-232 Baud Rate: 110, 150, 300, 600, 1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200 and 230400 (not guaranteed to work);
CAN feature:
• CAN interface connector: D-sub 9-pin male;
• CAN Baud Rate: 10K, 20K, 50K, 100K, 125K, 250K, 500K, 800K and
1M bps;
• Isolation voltage: 3000Vrms on the CAN side;
Power requirement:
• Unregulated +10V DC ~ +30V DC;
• Power reverse protection, Over-Voltage brown-out protection;
• Power consumption: 1W;
System:
• Dimensions: 123mm x 72mm x 33mm;
• Operating temperature: -25 to 75ºC (14 to 185ºF);
• Storage temperature: -25 to 80ºC (-13 to 185ºF);

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• Humidity: 5 to 95%, non-condensing;
• LEDs: ON LED for power and data flow;
ERR LED for error;
Software Utility tool:
• CAN bus Baud Rate configuration;
• CAN acceptance filter configuration;
• Setting for CAN 2.0A or 2.0B working mode;
• Setting the Baud Rate and data format on RS-232;
• Setting the RS-232 communication with checksum function or not;
• Provides a response message or not when the ERR LED is turned on;
• Provides a quick testing function for transmitting/receiving CAN
messages;
2. Hardware
2.1 Block Diagram
Figure 2 is a block diagram illustrating the functions on the I-7530
module. It provides the 3000Vrms Isolation in the CAN interface site. And
hardware media in RS-232 interface is only adopted 3-wire connection.
Figure 2: Block diagram of I-7530

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2.2 Pin Assignment
Table 1: RS-232 DB9 Female Connector (CN1)
Terminal 3-wire RS-232
1 Not Connect
2 TXD
3 RXD
4 Not Connect
5 GND
6
7
8
9
Not Connect
Table 2: CAN DB9 Male Connector (CN2)
Terminal 2-wire CAN
1 Not Connect
2 CAN Low
3
4
5
6
Not Connect
7 CAN High
8
9 Not Connect

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Figure 3: Pin Assignment on the I-7530
2.3 Hardware connection
The RS-232 port on the I-7530 (DB9 female) is inserted directly into a
PC’s COM serial port or via a cable to the Host system.
Figure 4: RS-232 connection

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The pin assignment of the CAN port on the I-7530 (DB9 male) is
found in both the CANopen DS102 profile and in appendix C of the
DeviceNet specifications. This is the standard pin assignment for CAN.
Figure 5: CAN connection
2.4 Terminator resistor settings
According to the ISO 11898 specifications, the CAN Bus network
must be terminated by two termination resistance (120 ) for proper
operation, as shown in the below figure.
Figure 6: Terminator resistor

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Therefore, the I-7530 module supplies a jumper for users to connect
terminator resistor or not. If users want to use this terminator resistor,
please open the I-7530 cover and use the jumper to move the pins of the
JP3 to active which will activate the 120Ωterminator resistor built in the
system, as following figure.
Enable (default) Disable
Figure 7: JP3 position
2.5 Init/Normal Dip-switch
On the back of the I-7530 module, there is a dip-switch for setting the
operation or configuration mode of the module function. In the normal
situation, the user needs to first make a configuration in order to provide
the correct function when module works in the operation mode. The
following steps show how to use this dip-switch.
(1) Configuration mode: Please first set the dip-switch to “Init” position.
Then the I-7530 will work in the configuration mode after the power
the module has been turned on. In this case, users can configure the
communication parameters of the I-7530 module by using the I-7530
Utility tool. After the configuration, users need to set the dip-switch to
the “normal” position. Then, the I-7530 can work in the operation
mode once the power has been turned on. Once you have completed
your configurations and have switched to the operation mode, then

I-7530 RS-232 to CAN Converter User’s Manual (Version 1.0,Aug/2004, I-7530) ------------ 10
messages will pass between the CAN and the RS-232. This
transmission process depends on the configuration parameters that
the users have configured.
(2) Operation mode: Please set the dip-switch to the “normal” position
and then turn on the power. The module will then work in the
operation mode. That is, the I-7530 functions as a RS-232/CAN
converter.
Figure 8: Dip-switch of I-7530
2.6 LED Indication
The I-7530 provides the Converter function between the RS-232 and
CAN media. It can handle both an 11-bit and 29-bit ID format according to
whether it is a CAN 2.0A and 2.0B. In order to provide high performance
when converting data, the I-7530 has built in software FIFO queues,
which include 1000 CAN data frames. It also provides two LEDs to
indicate to users what situation the I-7530 is in. The ON LED indicator
establishes the power and operation situation simultaneously. If the
module is working in the operation mode, the ON LED is always turned on.
However, when the module is working in the configuration mode, the ON
LED will flash approximately once per second. The ERR LED is used for
demonstrating an error that has occurred. That is, the ERR LED is
normally turned off when the module works in a good condition. On the
other hand, when the BUS OFF error indicator of the CAN controller has
been alerted, the ERR LED will turn on. In this case, users can only
reboot the I-7530 module in order to turn off the ERR LED. If the
CAN/RS232 FIFO overflows, the ERR LED will also be turned on. Users
can use the command string, “C[CHK]<CR>”, to clear the FIFO flag.
Besides, when the ERR LED is turned on, users can also use the
command string “S[CHK]<CR>” to read back the error situation. Please
refer back to the command strings description section.

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Figure 9: LED position
Table 3: LED indication
LED Name I-7530 Condition LED Status
Configuration Mode Flashes once per second
ON LED Operation Mode Always turned on
ERR LED Some errors occurred Always turned on
3. Software Utility
Users can download I-7530 Utility software from the ICP DAS web
site (http://www.icpdas.com/products/7000/i-7530.htm) or get this
information from the ICP DAS companion CD-ROM. The I-7530 Utility
tool can be used to configure the operation condition between CAN and
RS-232 communications. Also it can be used to transmit or receive a CAN
message for simple testing of the module’s functions. To start the “I-7530
Utility”, please run the I7530.exe file, as shown in the below figure.
Connect the I-7530’s COM port with the PC’s COM port via a RS-232
cable. Then the user can connect the CAN interface into the CAN network
based on the CAN specifications. For further information related to this,
please refer to 1.5 section of this manual on how to make a hardware
connection.

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Figure 10: I-7530 Utility
3.1 How to configure the module parameters
The following procedure will guide you on how to configure the
communication parameters for the CAN and RS-232 interface. The
configuration steps are depicted as below:
1. Set the Init/Normal switch to the Init position, which is located at the
back of the I-7530 module.
2. Connect the power source (the 10~30 DC volts) into the I-7530 module.
3. The I-7530 module’s ON LED will flash approximately once per second.
That means the I-7530 module is working in the configuration mode.
4. The user must run the I-7530’s Utility software after they have made a
wire connection between the PC and the I-7530 by COM port.
5. Click the “Setting…” icon on the I-7530 Utility tool bar in order to
configure the PC COM port, which will be used to connect to the I-7530
COM port, as shown in the following figure.

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Figure 11: COM port setting
6. Click the “Connect” icon to bring out the I-7530 configuration window.
The I-7530 Utility will show some communication information from the I-
7530 module on the window, as shown in the following figure.
Figure 12: Connect to the configuration mode of the I-7530
7. Choose the “Setting” tab to open the configuration window for the CAN
and the RS-232 communication parameters of the I-7530. Once users
have finished changing the parameter settings, please click the “setting”
button to store the communication parameters into the EEPROM on the
I-7530.
Note: If users click the “Defaults” icon, all of the CAN and RS-232
communication parameters on the I-7530 will be set to the default
value, which is:

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RS232: RS-232 Baudrate = 115200
Data Bit = 8
StopBit =1
Parity = None
Add Checksum = No
Error Response = No
CAN: CAN Specification = 2.0A
CAN bus Baudrate = 125K
Acceptance Code = 00000000
Acceptance Mask = 00000000
3.2 How to test the module transmission performance
The following procedure will guide you to learning how to
transmit/receive CAN messages to/from other device/PC by using the I-
7530 converter:
1. Set the Init/Normal switch to the Normal position, which is found at the
back of the I-7530 module.
2. Connect the I-7530’s CAN port into the CAN network, which must at
least have one CAN device on the network.
3. Supply the 10~30 volts DC source into the I-7530 module by the power
terminal.
4. The ON LED on the I-7530 module will be turned on. That means the I-
7530 works on the operation mode.
5. Run the I-7530 Utility software after there is a wire connection as
shown in Section 1.5.
6. Click the “Setting…” icon on the tool bar in the I-7530 Utility to configure
a PC COM port, which will be used to connect to the COM port of the I-
7530.

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Figure 13: COM port setting
Note: The RS-232 communication parameters on the I-7530 module must
be set to the default value. The default values for the RS-232
communication parameters are given below:
Baud rate = 115200
Data bit = 8
Stop bit = 1
Parity = None
Checksum = No
7. Click the “Connect” icon to connect to the I-7530’s testing mode. Then
the I-7530 Utility will show the test tab in the window as can be seen in
the below figure.
Figure 14: Connect to the operation mode of I-7530
8. Select the “Test” tab. Users will then be able to transmit or receive CAN
messages via the I-7530 module.

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4. Command list
For easy application, we provide 9 command strings to allow users to
send and receive commands and responses through the I-7530. It can
cover most applications of different requests. The general format of the
commands for the I-7530 are given below:
Command Format: <Command>[CHK]<CR>
<Command> : The RS-232 commands of the I-7530 Converter.
[CHK] : 2-character checksum value. It is effective only if the
checksum mechanism is set to enable by using I-7530
Utility.
<CR> : All RS-232 commands of the I-7530 Converter must end
with the character “<CR>” (The ASCII value is 13).
The 9 command formats are given in the following table. More
detailed information related to of the each command will be described in
the following sub sections.
Table 4: Command list table
Command Description
tIIILDD…[CHK]<CR> Send or receive a standard data frame.
TIIIL[CHK]<CR> Send or receive a standard remote frame.
eIIIIIIIILDD…[CHK]<CR> Send or receive an extended data frame.
EIIIIIIIIL[CHK]<CR> Send or receive an extended remote frame.
S[CHK]<CR> Read the status value of I-7530
C[CHK]<CR> Clear CAN/RS232 FIFO error flag of overflow.
P0BBDSPAE[CHK]<CR> Change the RS-232 configuration
P1B [CHK]<CR> Change the CAN configuration
RA[CHK]<CR> Reboot the I-7530 module.

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4.1 tIIILDD…[CHK]<CR>
Description: Send or receive a standard CAN data frame.
 Syntax: tIIILDD…[CHK]<CR>
tRepresent a standard (2.0A) data frame.
III 11 bits Identifier (000~7FF)
LData length (0~8)
DD… Input data frame value according to the data length
(00~FF)
 Response: Valid command: No response
Invalid command: ?<Error Code><CR>
 Note: The response of Syntax error or communication error can be
responded to the hosts by enable the function through the software
utility.
 Example:
Command: t03F6112233445566<CR>
Send a CAN message with a standard data frame. ID=03F, DLC=6,
data1=11, data2=22, data3=33, data4=44, data5=55 and data6=66.
4.2 TIIIL[CHK]<CR>
Description: Send or receive a standard CAN remote frame.
 Syntax: TIIIL[CHK]<CR>
TRepresents a standard (2.0A) remote frame.
III 11 bits Identifier (000~7FF)
LData length (0~8)
 Response: Valid command: No response
Invalid command: ?<Error Code><CR>
 Note: The response of Syntax error or communication error can be
responded to the hosts by enable the function through the software
utility.
 Example:

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Command: T2E88<CR>
Send a CAN message with a standard remote frame. ID=2E8,
DLC=8.
4.3 eIIIIIIIILDD…[CHK]<CR>
Description: Send or receive an extended CAN data frame.
 Syntax: eIIIIIIIILDD…[CHK]<CR>
eStands for the extended (2.0B) data frame.
IIIIIIII 29 bits Identifier (00000000~1FFFFFFF)
LData length (0~8)
DD… Input data frame value according to the data length
(00~FF)
 Response: Valid command: No response
Invalid command: ?<Error Code><CR>
 Note: The response of Syntax error or communication error can be
responded to the hosts by enable the function through the software
utility.
 Example:
Command: e1234567851122334455<CR>
Send a CAN message with an extended data frame. ID=12345678,
DLC=5, data1=11, data2=22, data3=33, data4=44 and data5=55.
4.4 EIIIIIIIIL[CHK]<CR>
Description: Send or receive an extended CAN remote frame.
 Syntax: EIIIIIIIIL[CHK]<CR>
EStands for the extended (2.0B) CAN remote frame.
IIIIIIII 29 bits Identifier (00000000~1FFFFFFF)
LData length (0~8)
 Response: Valid command: No response
Invalid command: ?<Error Code><CR>

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 Note: The response of Syntax error or communication error can be
responded to the hosts by enable the function through the software
utility.
 Example:
Command: E010156786<CR>
Send a CAN message with an extended remote frame. ID=01015678,
DLC=6.
4.5 S[CHK]<CR>
Description: Read the I-7530 CAN Baud Rate and error flag message.
 Syntax: S[CHK]<CR>
S Command character.
 Response: Valid Command: !CFFTTRRO[CHK]<CR>
Invalid command: ?<Error Code>[CHK]<CR>
!Delimiter for valid command
Ccurrent baud rate setting of CAN
FF CAN register
TT CAN transmit error counter
RR CAN receive error counter
OCAN/RS-232 FIFO Overflow flag
 Note: The response of Syntax error or communication error can be
responded to the hosts by enable the function through the software
utility. Furthermore, all response results are shown in the ASCII
format. Users need to make an ASCII to hex format transformation in
order to understand what the meaning is based on the following table.
Table 5: CAN baud rate list
AsciiToHex(C) Description
0 10K baud rate of CAN
1 20K baud rate of CAN
2 50K baud rate of CAN
3 100K baud rate of CAN
4 125K baud rate of CAN
5 250K baud rate of CAN

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6 500K baud rate of CAN
7 800K baud rate of CAN
8 1000K baud rate of CAN
Table 6: CAN register list
AsciiToHex(FF) Description
Bit 7 Bus Off Mode
Bit 6 Error Passive Mode
Bit 5 Reserved
Bit 4 Overrun Buffer
Bit 3 Stuff Error General
Bit 2 CRC Error General
Bit 1 Form Error General
Bit 0 Acknowledgment Error General
Table 7: CAN/RS-232 FIFO overflow flag list
AsciiToHex(O) Description
Bit 3 Reserved
Bit 2 Reserved
Bit 1 RS-232 FIFO Overflow
Bit 0 CAN FIFO Overflow
 Example:
Command: S<CR>
Receive: !50000000<CR>
Obtain some current information on the I-7530 module. The
response will show the following results: CAN baud rate=250K,
CAN register= normal, CAN transmit error counter=0, CAN receive
error counter=0 and CAN/RS232 FIFO= normal.
4.6 C[CHK]<CR>
Description: Clear the CAN/RS-232 FIFO overflows error flag on the
module.
 Syntax: C[CHK]<CR>