GridConnect CAN USB-232 User manual

CAN USB-232
User Manual
Revision E August 1, 2016

CAN USB-232 User Manual i
Copyright and Trademark
Copyright 2012-2016, Grid Connect, Inc. All rights reserved.
No part of this manual may be reproduced or transmitted in any form for any purpose other than the
purchaser's personal use, without the express written permission of Grid Connect, Inc. Grid
Connect, Inc. has made every effort to provide complete details about the product in this manual, but
makes no warranty of any kind with regard to this material, including, but not limited to, the implied
warranties of merchantability or fitness for a particular purpose. In no event shall Grid Connect, Inc.
be liable for any incidental, special, indirect, or consequential damages whatsoever included but not
limited to lost profits arising out of errors or omissions in this manual or the information contained
herein.
Grid Connect, Inc. products are not designed, intended, authorized or warranted for use as
components in systems intended for surgical implant into the body, or in other applications intended
to support or sustain life, or in any other application in which the failure of a Grid Connect, Inc.
product could create a situation where personal injury, death, or severe property or environmental
damage may occur. Grid Connect, Inc. reserves the right to discontinue or make changes to its
products at any time without notice.
Grid Connect and the Grid Connect logo, and combinations thereof are registered trademarks of Grid
Connect, Inc. All other product names, company names, logos or other designations mentioned
herein are trademarks of their respective owners.
CAN USB-232 is a trademark of Grid Connect, Inc.
Grid Connect
1630 W. Diehl Rd.
Naperville, IL 60563, USA
Phone: [phone]
Technical Support
Phone: [phone]
Fax: [phone]
On-line: www.gridconnect.com

ii CAN USB-232 User Manual
Disclaimer and Revisions
Operation of this equipment in a residential area is likely to cause interference in which case the
user, at his or her own expense, will be required to take whatever measures may be required to
correct the interference.
Attention: This product has been designed to comply with the limits for a Class B digital
device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with this guide, may cause harmful interference to radio communications.
Changes or modifications to this device not explicitly approved by Grid Connect will void the user's
authority to operate this device.
The information in this guide may change without notice. The manufacturer assumes no
responsibility for any errors that may appear in this guide.
Date
Rev.
Author
Comments
04/19/2012
A
GR
Preliminary Release
10/15/12
B
GR
Updates to drawings
11/27/12
C
GR/DQ
New Features. V01.02
05/14/2015
D
GR/DQ
16-bit Timestamp for received messages
08/01/2016
E
GR/JK
Power input specifications

CAN USB-232 User Manual iii
Warranty
Grid Connect warrants each product to be free from defects in material and workmanship for a
period of ONE YEAR after the date of shipment. During this period, if a customer is unable to
resolve a product problem with Grid Connect Technical Support, a Return Material Authorization
(RMA) will be issued. Following receipt of a RMA number, the customer shall return the product to
Grid Connect, freight prepaid. Upon verification of warranty, Grid Connect will -- at its option --
repair or replace the product and return it to the customer freight prepaid. If the product is not under
warranty, the customer may have Grid Connect repair the unit on a fee basis or return it. No services
are handled at the customer's site under this warranty. This warranty is voided if the customer uses
the product in an unauthorized or improper way, or in an environment for which it was not designed.
Grid Connect warrants the media containing software and technical information to be free from
defects and warrants that the software will operate substantially for a period of 60 DAYS after the
date of shipment.
In no event will Grid Connect be responsible to the user in contract, in tort (including negligence),
strict liability or otherwise for any special, indirect, incidental or consequential damage or loss of
equipment, plant or power system, cost of capital, loss of profits or revenues, cost of replacement
power, additional expenses in the use of existing software, hardware, equipment or facilities, or
claims against the user by its employees or customers resulting from the use of the information,
recommendations, descriptions and safety notations supplied by Grid Connect. Grid Connect liability
is limited (at its election) to:
1) refund of buyer's purchase price for such affected products (without interest)
2) repair or replacement of such products, provided that the buyer follows the above procedures.
There are no understandings, agreements, representations or warranties, expressed or implied,
including warranties of merchantability or fitness for a particular purpose, other than those
specifically set out above or by any existing contract between the parties. The contents of this
document shall not become part of or modify any prior or existing agreement, commitment or
relationship.

Contents
iv CAN USB-232 User Manual
Table of Contents
1. Overview ...........................................................................................................................1-1
1.1 Introduction.........................................................................................................1-1
1.2 Hardware Description .........................................................................................1-3
1.3 Model Description...............................................................................................1-3
1.4 CAN Network .....................................................................................................1-4
1.5 Additional Documentation..................................................................................1-5
2. Getting Started.................................................................................................................2-6
2.1 Driver Installation ...............................................................................................2-6
2.1.1 TeraTerm Install..................................................................................2-7
2.1.2 USB Drivers........................................................................................2-7
2.1.3 COM Port Assignment........................................................................2-8
2.1.4 USBView............................................................................................2-8
2.2 Hardware Installation..........................................................................................2-9
2.2.1 RS232 Serial Cable.............................................................................2-9
2.2.2 USB Cable Wiring............................................................................2-10
2.2.3 Power Options...................................................................................2-10
2.2.4 Item Locator CAN-232.....................................................................2-11
2.2.5 Item Locator CAN-USB ...................................................................2-11
2.2.6 Input Power.......................................................................................2-11
2.2.7 Isolated Power Option.......................................................................2-12
2.2.8 OEM Options....................................................................................2-12
2.2.9 Configuration Push Button................................................................2-13
2.2.10 CAN Driver.....................................................................................2-14
2.2.11 TTL Option.....................................................................................2-15
2.3 Entering Configuration Mode...........................................................................2-16
2.3.1 RS232 Interface: ...............................................................................2-16
2.3.2 USB Interface:...................................................................................2-16
2.3.3 Config Button....................................................................................2-17
2.4 Mode Options....................................................................................................2-19
2.4.1 Get Mode...........................................................................................2-19
2.4.2 Set Mode...........................................................................................2-19
2.5 COM Options....................................................................................................2-19
2.5.1 Get Com Port ....................................................................................2-19
2.5.2 Set Com Port.....................................................................................2-20
2.6 CAN Port Options.............................................................................................2-20
2.6.1 Defining the CAN Bit-Time..............................................................2-20
2.6.2 CAN Bus State During Configuration ..............................................2-20
2.6.3 Get CAN Port....................................................................................2-21
2.6.4 Set CAN Port Baud Sample Point.....................................................2-21
2.6.5 Set CAN Port Baud Sample Point Tolerance...................................2-22
2.6.6 Set CAN Port Baud Sample Point Browse .......................................2-22
2.6.7 Set CAN Port Baud Sample Point Tolerance....................................2-23

Contents
CAN USB-232 User Manual v
2.6.8 Set CAN Port (CLK_DIV BRG TSEG1 TSEG2 SJW).....................2-23
2.7 CAN Command Mode.......................................................................................2-24
2.7.1 Message String Syntax ......................................................................2-25
2.7.2 Normal CAN Message.......................................................................2-25
2.7.3 RTR CAN Message...........................................................................2-26
2.7.4 Appending CR/LF To Received Command Strings..........................2-26
2.7.5 Binary Formatted Messages ..............................................................2-27
2.7.6 Get CAN Command Mode Settings..................................................2-29
2.7.7 Set CAN Command Mode Filter On/Off...........................................2-29
2.7.8 Set CAN Command Mode RX Operating Mode...............................2-30
2.7.9 Set CAN Command Mode RX Input Format....................................2-30
2.7.10 Set CAN Command Mode TX Output Format................................2-30
2.7.11 Set CAN Command Mode Message Output Termination...............2-31
2.8 CAN Virtual Command Mode ..........................................................................2-31
2.8.1 The ‘XMIT’ and ‘RCEV’ Identifiers.................................................2-32
2.8.2 ‘XMIT’ Identifier ..............................................................................2-32
2.8.3 ‘RCEV’ Identifier..............................................................................2-32
2.8.4 Get CAN Virtual Circuit Setting .......................................................2-33
2.8.5 Set CAN Virtual Circuit TX ID.........................................................2-34
2.8.6 Set CAN Virtual Circuit RX ID ........................................................2-35
2.8.7 Set CAN Virtual Circuit Forced Send Code......................................2-36
2.8.8 Set CAN Virtual Circuit Forced Wake Code ....................................2-37
2.8.9 Set CAN Virtual Circuit Timeout Send.............................................2-38
2.8.10 Set CAN Virtual Circuit Wake Timeout .........................................2-39
2.8.11 Set CAN Virtual Circuit Wait after Wakeup...................................2-40
2.8.12 Set CAN Virtual Circuit Wakeup Message.....................................2-41
2.9 Defining Filter Entries.......................................................................................2-42
2.10 Using Message Filters .....................................................................................2-42
2.10.1 How Filtering Works.......................................................................2-42
2.10.2 Setting Up Message Filters..............................................................2-43
2.10.3 Get CAN Filter ................................................................................2-43
2.10.4 Set CAN Filter.................................................................................2-44
2.10.5 Delete CAN Filter............................................................................2-44
2.10.6 Delete CAN Filter Range ................................................................2-45
2.10.7 Delete CAN Filter All......................................................................2-45
2.11 Config Entry Commands.................................................................................2-46
2.11.1 Get cfgcmd cm.................................................................................2-47
2.11.2 Set cfgcmd cm enable=YES | NO ...................................................2-47
2.11.3 Get cfgcmd vc..................................................................................2-47
2.11.4 set cfgcmd vc enable=YES | NO .....................................................2-48
2.11.5 set cfgcmd vc tbeg=timeout.............................................................2-48
2.11.6 set cfgcmd vc tend=timeout.............................................................2-48
2.11.7 set cfgcmd vc tid=timeout ...............................................................2-48
2.11.8 set cfgcmd vc seq=”sequence” ........................................................2-48
2.12 CAN Timestamp Commands...........................................................................2-48
2.12.1 get timestamp...................................................................................2-49
2.12.2 set timestamp...................................................................................2-50
2.13 CAN Timeout Commands...............................................................................2-50
2.13.1 Get can timeout................................................................................2-50
2.13.2 Set can timeout can_tx_busy=timeout.............................................2-50
2.14 Serial Number in Command Mode..................................................................2-51

Contents
vi CAN USB-232 User Manual
2.14.1 get sernumcmd cm..........................................................................2-51
2.14.2 set sernumcmd cm enable ...............................................................2-51
2.15 Profiles............................................................................................................2-52
2.15.1 Set Active Profile Number..............................................................2-52
2.15.2 Copy Profile....................................................................................2-52
2.15.3 Profile Note.....................................................................................2-53
2.15.4 Profile Note #..................................................................................2-53
2.15.5 Profile Note All...............................................................................2-53
2.15.6 Profile Note Text.............................................................................2-53
2.15.7 Profile Note #=Text ........................................................................2-54
2.15.8 Set Active Profile to Default...........................................................2-54
2.15.9 Set Specific Profile to Default.........................................................2-54
2.15.10 Set All Profiles to Default.............................................................2-54
2.16 Serial Number in Config Mode.......................................................................2-54
2.16.1 CAN Port SERNUM Interaction.....................................................2-54
2.16.2 Get Serial Number ..........................................................................2-54
2.16.3 Get Version Number.......................................................................2-55
2.17 Test Options....................................................................................................2-55
2.17.1 Cycling LED Indicators ..................................................................2-55
2.17.2 Generating CAN Square Wave.......................................................2-55
2.17.3 Test LEDs .......................................................................................2-55
2.17.4 Test LEDs and CAN Bus................................................................2-55
2.17.5 Exit..................................................................................................2-55
2.18 XMODEM Download.....................................................................................2-56
2.19 Technical Support ...........................................................................................2-56

Getting Started
CAN USB-232 User Manual 1-1
1. Overview
1.1 Introduction
The CAN USB-232 enables the use of an RS232 or USB COM port to send and receive CAN messages on
an ISO11898 CAN network.
The CAN USB-232 can be configured to operate in either the command mode or the virtual circuit mode,
providing the user with a choice as to the type of functionality desired.
In the command mode, the CAN USB-232 is capable of sending and receiving arbitrary CAN messages
through the serial port, providing a complete CAN-232 or CAN-USB interface. This mode also supports
message filtering to limit the range of CAN identifiers that will be received.
In the virtual circuit mode, the CAN USB-232 creates a transparent ‘virtual’ link between itself and another
CAN USB-232, providing the ability for applications to use a CAN network as a point-to-point link,
supporting full-duplex exchange of arbitrary stream data.
The CAN USB-232 operating mode and all other configuration parameters are accessed through the ‘config’
button. Pressing the button causes the CAN USB-232 to enter configuration mode where it then prompts the
user to modify configuration parameters.
In addition to parameter configuration, the configuration mode also provides diagnostic tools to assist in the
measurement of bus signal propagation time and termination characteristics.
The CAN USB-232 represents an evolution of the earlier CAN-uVCCM and CAN-USB product lines,
providing a performance increase and enhanced features, while retaining backward compatibility.
There are two hardware platforms, both of which execute the same firmware, with one providing a CAN-
RS232 interface and the other a CAN-USB interface. The CAN-RS232 version is shown below.
The new units are based on an ARM Cortex-M3 32-bit microcontroller, providing 100 MIPS of processing
power with an extremely efficient instructions set. The performance increase over the legacy
microcontroller is approximately 25 times faster.
All device interfaces (UART, CAN, USB) have built-in hardware buffers that allow for high-speed data
flow without data loss. Hardware buffering, coupled with a fast and efficient CPU, allows each interface to
operate at its maximum rated limit.

Troubleshooting
1-2 CAN USB-232 User Manual
The USB interface has been re-designed based on a parallel-port version of the current USB-to-UART
interface chip, providing 100% USB interface speed while using the same USB driver software as the earlier
CAN-USB unit. The application interface remains identical, providing 100% backward compatibility at the
USB level while adding a major performance boost.
Both versions support isolated and non-isolated CAN configurations. This option must be selected at the
time of purchase.
With the additional microcontroller FLASH memory available, the new units support a user-accessible boot-
loader, allowing users to download firmware updates by themselves.
By using the time-tested and very simple XMODEM protocol widely available in terminal emulation
programs, end-users can download firmware directly through the COM-RS232 or COM-USB port to update
the device.
To protect against unauthorized duplication of hardware, the firmware is encrypted with a 256-bit AES
cipher. The boot loader decrypts and verifies authenticity of the firmware to ensure only an authorized
version is being downloaded.