can 2.0a/b ↔ rs232/rs485 converter - 4n-galaxy · pdf filecan 2.0a/b ↔ rs232/rs485...

CAN 2.0A/B ↔ RS232/RS485 Converter (Prod. No. #632)

- Listen Only Mode –

No influence of the CAN system by the converter

or

- Normal Mode –

A/B 11, 29 Bit ID

CAN-side: 10 kbps ... 1 Mbps

RS232- side: up to 1 Mbps

RS485- side: up to 3 Mbps

Table of Contents

Table of Contents.....................................................................................................................................2

1 Introduction...........................................................................................................................................3

2 Startup...................................................................................................................................................4

3 Converter Block Diagram.......................................................................................................................5

4 Setup Mode............................................................................................................................................5

5 Normal Mode.........................................................................................................................................7

6 Converter ASCII Commands...................................................................................................................9

7 Technical Specifications: CAN ↔ RS232/RS485 Adapter (#630)........................................................12

1 Introduction

As a powerful tool the CAN converter supports development, service, testing and maintenance of

CAN-based systems. They are suitable for online monitoring and manipulation of the bus as well as

their logging.

The converter supports 11 and 29 bit identifiers (CAN2.0A/2.0B). The Listen Only mode it is no

transmission of Ack bit and error frames, thereby influencing the CAN system is avoided.

The CAN baud rate is detected automatically by the converter. As well the converter provides the

ability to adjustthe baud rate and other parameters to your needs.

The CAN Converter is ideally suitable for the investigation of the CAN bus data. The converter can be

easily plugged into any RS232 or RS485 port of a computer or notebook. The data can be displayed

in any standard terminal program or the 4N-CAN-terminal program.

More information can be found in the following sections.

2 Startup

Before first use:

• Connect converter on RS232/RS485 side with your pc RS232/RS485-port

• Connect CAN-side with your application

• Start the terminal program

In our download area you will find the converter optimized for the terminal program: 4N-GX

CAN-Terminal

• Choose the right COM port

• Set COM port to 38600 Baud 8N1

• Power on the converter

• Send within 5 seconds a "s" (initiates the setup mode)

• The converter responds "CAN2.0 – RS232/RS485 Converter V4.4"

• Send "h" for help output in the terminal

• Set CAN side configuration as needed

• Send "E�" - Stores settings in the flash and restarts the converter. (� - corresponds to

"Enter" key)

• Done

Important:

Sending a "s" within 5 seconds switches the converter into setup mode. Options of this mode will be

described later. "E" or "Q" ends the setup mode.

E - Saves Configuration to the converters flash memory, and exits the setup mod

Q - Exit without saving

For the operation of the converter, the following setup parameters must be set correctly:

• CAN Baudrate (or Autobaud)

• ID (results in 11- or 29-Bit Format)

• Acceptance-Code

• Acceptance-Mask

• RS232/RS485 Baudrate

4.1 CAN ID Filter Setup

The converters accept messages from specific IDs which can be defined by the CAN identifier (CI), the

CAN-Acceptance-Code (CAC) and the CAN-Acceptance-Mask (CAM). CAC defines the mandatory

required bits of the received ID and the CAM, the bits to ignore. The CAN identifier

can be determined by the choice of converter id to whether either will be accepted ONLY 11

bits (id <= 7FF) or ONLY29 bit addresses (id <= 7FF).

Sample:

CAC: 3A0 011 1010 0000

CAM: 0E 1110

---------------------------------------

Filter: 011 1010 xxx0 x: not relevant

Accepted IDs: 011 1010 0000 3A0

011 1010 0010 3A2

011 1010 0100 3A4

011 1010 0110 3A6

011 1010 1000 3A8

011 1010 1010 3AA

011 1010 1100 3AC

011 1010 1110 3AF

In this example, the bits 2 to 4 are not relevant. All other bits must match.

Mathematical condition: (ID OR AC) = (CAC OR AC)

Only if the two results are equal, the ID is accepted and output to the USB port for further

processing.

Basically it works like this:

CAN-Acceptance Filter B011 1010 0000

CAN-Acceptance Mask B000 0000 1110

The filter would pass only 3A0, but only Bits 1-3 are flagged, so 3A0,3A2,3A4,3A6,3A8,3AA,3AC and

3AE will be passed. In logical terms: (Message Bit AND Filter Bit) or Mask Bit

More samples:

4.2 CAN Modes

The converter is in Listen Only mode or normal mode to operate.

L = 1 Listen Only Mode (read without ACK) L = 0 Normal Mode (read and write)

5 Normal Mode

If the converter powered on and the setup mode is not initiated within 5 seconds, it starts in

normal mode. In this mode, the communication of the CAN bus can be monitored (chapter:

5.2 Receive Data) and data be transmitted to the bus (chapter: 5.1 Sending Data).

5.1 Sending Data

All Data, sent from the computer to the COM port, will be output on the CAN bus.

The following formats are used:

ID CR space = $20 (Space "_") CR = $ 0D (Enter "�") - ID without Data

ID space Data CR space = $20 (Space "_") CR = $ 0D (Enter "�") - ID with Data

With the converter setting:

CAN-Identifier = 1F000000 (29 Bit CAN-Identifier)

the following data is output: (11 and 29 bit messages)

Input Meaning

7E8_0001020304� CAN ID 7E8 Data 00 01 02 03 04 Data Length 5

7E8_0� CAN ID 7E8 no Data Data Length 0

7E8_01_01� CAN ID 7E8 Data 01 Data Length 1

1FFFFFFF_010203_03� CAN ID 1FFFFFFF Data 0102030 Data Length 3

10001234_0102_02� CAN ID 10001234 Data 01020 Data Length 2

With the setting:

CAN-Identifier = 1FF (11 Bit CAN-Identifier)

the following data is output: (only 11 bit CAN messages)

Input Meaning

7E8_0001020304_05� CAN ID 7E8 Data 00 01 02 03 04 Data Length 5



In case of 11 bit ID no 29 bit ID messages will be sent!

5.1.1 Send Error

If data is sent in the wrong format to the converter through the USB/COM port, it can be recognized

by the converter response "�S�" (Enter "S" Enter).

e.g.: 1FFFFFFF_010� (incomplete data, 0101 would be correct)

Converter response: "�S�"

5.2 Receiving Data

What data received by the converter and at RS232/RS485 side are output for further processing

depends on the configuration of the CAN identifier, the CAM-Acceptance-Code and the CAN-

Acceptance-Mask. A detailed description of these parameters can be found with examples in

chapter "3.1 CAN ID Filter Setup".

Accepted CAN messages will be output in ASCII format as followed:

ID space Data space Length CR space = $20 (Space "_") CR = $ 0D (Enter "�")

With the converter setting:

CAN-Identifier = 1F000000 (29 Bit CAN-Identifier)

CAN-Acceptance-Code = 00000000 (0 receives all CAN-Frames)

CAN-Acceptance-Mask = FFFFFFFF (F receives all CAN-Frames)

the following data is output on the USB side: (11 and 29 bit message)

PC Output Meaning




1FFFFFFF_010203_03� CAN ID 1FFFFFFF Data 0102030 Data Length 3

10001234_0102_02� CAN ID 10001234 Data 01020 Data Length 2

With the setting:

CAN-Identifier = 1FF (11 Bit CAN-Identifier)

CAN-Acceptance-Code = 00000000 (0 receives all CAN-Frames)

CAN-Acceptance-Mask = FFFFFFFF (F receives all CAN-Frames)

the following data is output: (only 11 bit CAN messages)

PC Output Meaning




5.2.1 Receive Error

Error LED (Buffer Overflow LED) lights up, if data is sent to fast from the PC to the converter.

Buffer Overflow can be recognized by "�E�" (Enter "E" Enter).

"�E�" is send from converter to PC.

At full CAN bus utilization can rarely cause errors (at 1 Mbps 100% bus utilization).

To recognize this is the fact that the messages are not received in full.

z.B.

7E8_000102� CAN ID 7E8 Data 00 01 02 ? Data Length?

7E8_01� CAN ID 7E8 Data 01 ? Data Length?

6 Converter ASCII Commands

(CR)=Enter (Dez=13, Hex=0D)

Es können Klein- und Großbuchstaben verwendet werden.

Befehl Funktion

S S Setup-Mode activation

Is possible only after power up in the first 5 seconds! In setup mode,

settings for the CAN side can be made and stored.

P P0(CR)

P1(CR)

Shows settings stored in converter RAM – changes have to be saved

by "E" xit

Show default settings.

Response: “Settings: List(CR)OK(CR)“ or “ERROR(CR)“

e.g.

C CAN-Bitrate : 5

L CAN-Mode : 0

I CAN-Identifier : 10000000

A CAN-Acceptance-Code : 00000100

M CAN-Acceptance-Mask : 00000000

R Baudrate : 3

Identifier Length : 29

Acc. Code Length : 32

Acc. Mask Length : 32

OK

C C0(CR)

C1(CR)

C2(CR)

C3(CR)

C4(CR)

C5(CR)

C6(CR)

C7(CR)

C8(CR)

C9(CR)

CA(CR)

CB(CR)

CC(CR)

CD(CR)

CE(CR)

CF(CR)

10 kbps CAN Bitrate

20 kbps CAN Bitrate

25 kbps CAN Bitrate

50 kbps CAN Bitrate

62,5 kb CAN Bitrate

100 kbps CAN Bitrate


128,2 kb CAN Bitrate





1.0 Mbps CAN Bitrate Other baud rates available on request

Autobaud – automatic baudrate Detection



Response: “Settings: List(CR)OK(CR)“ or “ERROR(CR)“

Befehl Funktion

I Ixxx(CR)

or

Ixxxxxxxx(CR)

Identifier in Hex (000...7FF) 11 Bit Standard Format

or

Identifier in Hex (00000000...1FFFFFFF) 29 Bit Extended Format

This setting determines whether only 11-bit or 11-bit and 29-bit are

accepted by CAN-Acceptance-Code and CAN-Acceptance-Mask.

Response: “List of parameters: (CR)OK(CR)” or “ERROR(CR)“

L Lx(CR) Listen Mode Only (0...1)

0 – CAN Normal Mode (read and write)

1 – CAN Listen Only Mode (listening only, read)


A Axxxxxxxx(CR) CAN-Acceptance-Code x = (0...000007FF) 11 Bit Standard Format

CAN-Acceptance-Code x = (0...1FFFFFFF) 29 Bit Extended Format

x = 0 receives all CAN-Frames


M Mxxxxxxxx(CR) CAN-Acceptance-Mask x = (0..000007FF) 11 Bit Standard Format

CAN-Acceptance-Mask x = (0..1FFFFFFF) 29 Bit Extended Format

x = F receives all CAN-Frames


R R0(CR)

R1(CR)

R2(CR)

R3(CR)

R4(CR)

R5(CR)

R6(CR)

R7(CR)

R8(CR)

R9(CR)

RA(CR)

RB(CR)

RC(CR)

RD(CR)

RE(CR)

RF(CR)

600 bps RS232/RS485 Baudrate (all 8 N 1)

1200 bps

2400 bps

4800 bps

9600 bps

19200 bps

38400 bps

57600 bps

115200 bps

230000 bps

500000 bps

600000 bps

750000 bps

1000000 bps

1500000 bps

3000000 bps Other baud rates available on request

Response: “ (CR)OK(CR)” or “ERROR(CR)”

V Software Version Number

Response: „Software Version: x.x(CR)“ x = 0..F

N Converter Nummer

Response: „Converter-ID: xxxx xxxx(CR)“ x= 0..F

Befehl Funktion

?

or

H

?

or

H

Help

This table is output to the COM port

E E Exit

Exits the Setup Mode and saves the configuration in flash memory of the

converter, followed by a Reset = Power On(Restart)

Response: e.g.

C CAN-Bitrate : 5

L CAN-Data Length : 8

I CAN-Identifier : 1F0000000

A CAN-Acceptance-Code : 00000100

M CAN-Acceptance-Mask : 00000000

R USB-Baudrate : 3

Identifier Length : 29

Acc. Code Length : 32

Acc. Mask Length : 32

SAVE to EEprom

OK

RESET

Q Q Quit

Exits the setup mode WITHOUT saving changes in the in flash memory of

the converter, followed by a Reset = Power On(Restart)

Response:

OK

RESET

Other parameters, functions are available on request.

7 Technical Specifications: CAN ↔ RS232/RS485 Modul (#632)

Product: CAN2.0 <=> RS232 & RS485 High Speed Isolated Modul #632

PC Software: 4N-GX CAN-Terminal

PC Software Docu: 4N-GX CAN-Terminal-v2.05-germany

4N-GX CAN-Terminal-v2.05-english

Connector 1: CAN 2.0A/B:

High speed vollisolierter CAN 2.0A & 2.0B Bus

Slope-Control Mode to Reduce EMI

Thermal Shutdown, Current Limiting

ISO 11898 Standard, CAN 2.0A & 2.0B

Connector 1 Pins: Klemme B - CAN_L

Klemme D - CAN_H

Klemme C - GND_CAN

Terminator: 120 R - between CAN_L and CAN_H (intern)

CAN 2.0 baudrates: 10 Kbps

20 Kbps

25 Kbps

50 Kbps

62,5 Kbps

100 Kbps

125 Kbps

250 Kbps

500 Kbps

800 Kbps

1.0 Mbps

oder

Autobaud

Connector 2: RS232:

±15 kV Human Body Model

±8 kV IEC 1000-4-2, Contact Discharge

±15 kV IEC 1000-4-2, Air-Gap Discharge

Latchup Free

1 Mbps Data Rate

EIA/TIA-232 Specifications Down to 3.0 V

RS485 Receiver:

+/- 15 kV Human Body Model

+/- 6 kV IEC 1000-4-2, Contact Discharge

+/- 12 kV IEC 1000-4-2, Air-Gap Discharge

Allow Up to 128 Receivers on the Bus

True-Fail-Safe Receiver

-7V .. +12V Common-Mode Range

Thermal Protection Against Output Short Circuit

RS485 Driver:

+/- 9 kV Human Body Model

Slev-Rate Limited for Errorless Data Transmission

-7V .. +12V Common-Mode Range

Current Limiting

Thermal Shutdown for Driver-Overload Protection

Connectron 2 Pins: RS232:

Klemme M - RXD In

Klemme K - TXD Out

Klemme A - GND_RS

RS485:

Klemme J - TX+ Out

Klemme L - TX- Out

Klemme H - RX+ In

Klemme G - RX- In

Klemme A - GND_RS

Connector 3: Power In

Connector 3 Pins: Power In:

Klemme E - 9..36V DC oder AC Input

Klemme F - 9..36V DC oder AC Input

RS232 & RS485

baudrates:

600 bps (all 8 N 1)

1200 bps

2400 bps

4800 bps

9600 bps

19200 bps

38400 bps

57600 bps

115200 bps

230000 bps

500000 bps

600000 bps

750000 bps

1000000 bps

1500000 bps

3000000 bps

RS232 up to 1 Mbps, RS485 up to 3 Mbps

Galvanic isolation: High common-mode transient immunity: >25 kV/µs

Safety and regulatory approvals

UL recognition: 5000 V rms for 1 minute per UL 1577

CSA Component Acceptance Notice #5A

IEC 60950-1: 600 V rms (reinforced)

IEC 60601-1: 250 V rms (reinforced)

VDE certificate of conformity

DIN V VDE V 0884-10 (VDE V 0884-10):2006-12

VIORM = 846 V peak

Indicators: Run LED

CAN LED

RS232/RS485 LED

Buffer Overflow LED

Poerating tmperatur: -5..+70°C

Dimensions (mm) 90 x H 75 x B 23 for Rail Din

can 2.0a/b ↔ rs232/rs485 converter - 4n-galaxy · pdf filecan 2.0a/b ↔ rs232/rs485...

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