ICP DAS USA I-7530 User manual

I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 1
The I
-
7530 RS
-
232/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.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 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
2.7 Cable selection.................................................................................11
3. Software Utility...................................................................................................12
3.1 How to configure the module parameters.........................................13
3.2 How to test the module transmission performance...........................15
4. Command list .....................................................................................................17
4.1 tIIILDD…[CHK]<CR>........................................................................18
4.2 TIIIL[CHK]<CR> ...............................................................................18
4.3 eIIIIIIIILDD…[CHK]<CR>..................................................................19
4.4 EIIIIIIIIL[CHK]<CR>..........................................................................19
4.5 S[CHK]<CR>....................................................................................20
4.6 C[CHK]<CR>....................................................................................22
4.7 P0BBDSPAE[CHK]<CR> .................................................................22
4.8 P1B [CHK]<CR>...............................................................................23
4.9 RA[CHK]<CR>..................................................................................24
4.10 General Error code for all command.................................................25
5. Troubleshooting.................................................................................................25
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 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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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 4
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,
sec section 2.7;
• 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 specs:
• 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);
CAN specs:
• 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;
Module specs:
• Dimensions: 123mm x 72mm x 33mm;
• Operating temperature: -25 to 75ºC (14 to 185ºF);
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• Storage temperature: -25 to 80ºC (-13 to 185ºF);
• 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;
Application:
• Factory Automation;
• Building Automation;
• Home Automation;
• Control system;
• Monitor system;
• Vehicle Automation;
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.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 6
Figure 2: Block diagram of I-7530
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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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 7
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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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 8
The pin assignment of the CAN port on the I-7530 (DB9 male)
defined in both the CANopen DS102 profile and in appendix C of the
DeviceNet specifications. It 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 resistances (120Ω) for proper
operation, as shown in the below figure.
Figure 6: Terminator resistor
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 9
Therefore, the I-7530 module supplies a jumper for users to connect
the terminator resistor or not. If users want to use this terminator resistor,
please open the I-7530 cover and use the JP3 jumper to activate the 120
Ωterminator resistor built in the system, as in the following figure. Note
that the default setting is active.
Enable (default), (Activate) Disable, (Deactivate)
Figure 7: JP3 positions
2.5 Init/Normal Dip-switch
On the back of the I-7530 module, there is a dip-switch used 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 the 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 the “Init” (Initial)
position. Then the I-7530 will work in the configuration mode after the
power for 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.
(2) Operation mode: After the configuration, users need to set the dip-
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 10
switch to the “Normal” position. Users need to turn the power off then
on again so that they can use the I-7530 in the operation mode. Once
you have completed your configurations and have switched to the
operation mode, then messages can pass between the CAN and the
RS-232. This transmission process depends on the configuration
parameters that the users have configured. 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 port
and the CAN port. It can handle both an 11-bit and 29-bit ID format
according to whether it is a CAN 2.0A or 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.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 11
Furthermore, If users want to check what the error situation is they must
send the command string “S[CHK]<CR>”. Depending on the result, users
will need to either reboot the I-7530 or use the command string
“C[CHK]<CR>” to clear the FIFO flag, which will then turn off the ERR
LED.
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
2.7 Cable selection
The CAN bus is a Balanced (differential) 2-wire interface running over
either a Shielded Twisted Pair (STP), Un-shielded Twisted Pair (UTP), or
Ribbon cable. The CAN-L and CAN-H Wire start on one end of the total
CAN network that a terminator of 120 Ohm is connected between CAN-L
and CAN-H. The cable is connected from CAN node to CAN node,
normally without or with short T connections. On the other end of the
cable again a 120Ω(Ohm) terminator resistor is connected between the
CAN lines. How to decide a cable type, cable length, and terminator
depends on the baud rate in the CAN BUS network, please refer to the
following table 4.
Figure 10: Un-shielded Twisted Pair (UTP)
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 12
Table 4: Cable selection
Bus speed Cable type Cable
resistance/m Terminator Bus Length
50k bit/s at 1000m 0.75~0.8mm2
18AWG 70 mOhm 150~300
Ohm 600~1000m
100k bit/s at 500m 0.5~0.6 mm2
20AWG < 60 mOhm 150~300
Ohm 300~600m
500k bit/s at 100m 0.34~0.6mm2 22AWG,
20AWG < 40 mOhm 127 Ohm 40~300m
1000k bit/s at 40m 0.25~0.34mm2 23AWG,
22AWG < 40 mOhm 124 Ohm 0~40m
Note: The AWG means a standard method used to measure wire. The
numbering system works backwards from what people would think, the
thicker (heavier) the wire, the lower the number. For example: a 24AWG
wire is thicker/heavier than a 26AWG wire.
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 the 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. The screenshot of the startup
screen for this Utility is given 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
section 1.5 of this manual on how to make a hardware connection.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 13
Figure 11: 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 via the COM port.
5. Click the “Settings…” icon on the I-7530 Utility tool bar in order to select
which PC COM port will be used to connect to the I-7530 COM port, as
shown in the following figure. Then click the “OK” button.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 14
Figure 12: COM port setting
6. Click the “Connect” icon to bring out the I-7530 configuration window.
The I-7530 Utility will show the communication information from the I-
7530 module in the window, as shown in the following figure.
Figure 13: Connect to the configuration mode of the I-7530
7. Choose the “Settings” 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
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 15
values, which are:
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 devices/PCs by using the I-
7530 converter. Note that users can only employ this test function for the
system if they are using the default communication parameters for the
RS-232 as provided above.
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 through the
power terminal.
4. The ON LED on the I-7530 module will be turned on. That means the I-
7530 is working in 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 “Settings…” icon on the tool bar in the I-7530 Utility to
configure the PC COM port, which will be used to connect to the COM
port of the I-7530.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 16
Figure 14: COM port setting
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 15: 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. There are two methods for
communicating with their CAN. The first method (check “Use CAN
Message”) requires users to understand their CAN specifications. And
input the correct data in the CAN message format. The second method
(uncheck “Use CAN Message”) allows the use of the command string
found in table 5 to transmit messages. Both methods require the user to
click the “Send” button to transmit the information into the CAN network.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 17
The CAN message will then automatically be displayed in the “Receive”
list box. Besides, user can press the “Clear” button to remove the
messages on the list box and then the new CAN messages will be
shown on the list box again.
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 5: 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: It is necessary to enable the “Error Response” function in the I-
7530 Utility, in order to receive Syntax and/or communication error
information at the host PC.
 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: It is necessary to enable the “Error Response” function in the I-
7530 Utility, in order to receive Syntax and/or communication error
information at the host PC.
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 19
 Example:
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: It is necessary to enable the “Error Response” function in the I-
7530 Utility, in order to receive Syntax and/or communication error
information at the host PC.
 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)
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I-7530 RS-232/CAN Converter User’s Manual (Version 1.0,Aug/2004, 7PH-021-01) ------------- 20
 Response: Valid command: No response
Invalid command: ?<Error Code><CR>
 Note: It is necessary to enable the “Error Response” function in the I-
7530 Utility, in order to receive Syntax and/or communication error
information at the host PC.
 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: It is necessary to enable the “Error Response” function in the I-
7530 Utility, in order to receive Syntax and/or communication error
information at the host PC. 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 6: CAN baud rate list
AsciiToHex(C) Description
0 10K baud rate of CAN
1 20K baud rate of CAN
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