602 KB - ipcas

ipEther232.PPP 

User Guide 

ipcas GmbH 

Wetterkreuz 17 

D-91058 Erlangen 

Telefon: +49 9131 7677 0 

Telefax: +49 9131 7677 78 

Internet: http://www.ipcas.de 

E-Mail: info@ipcas.de

Legal Information for Customers 

We have done our utmost to ensure that the information in this 

user guide is complete, accurate and up to date. In so far as legally 

possible, we cannot accept any liability for consequential damage 

caused by using this guide. In other respects we shall accept 

liability for intention and gross negligence only. We cannot provide 

any warranty that changes to third-party equipment referred to in 

this guide will have no effect on the applicability of the information 

provided in this guide. 

The author reserves all rights, including the right to reproduce this 

guide in full or part thereof in any form whatsoever. 

The content is subject to change without prior notification. 

The product is subject to technical change without prior notification. 

All trade marks mentioned in this manual are stated for 

identification purposes and may be the property of the various 

holders. 

Important Information 

• The device should be used exclusively with the mains unit 

supplied. Using a different power supply unit may result in damage 

to the device. 

• Use a dry cloth only to clean the operating panel and the housing. 

• If the device is damaged, disconnect from the mains. Arrange for 

immediate repair. 

• Before contacting your vendor's customer service, please consult 

this user guide. 

• Using customer service during the warranty period may incur 

costs, if the fault or problem was caused by the customer and the 

solution or remedy is described in this guide. 

• Removing the serial number will void the warranty rights. 

• Damage caused by inappropriate packing will not be borne by 

the forwarding agent / insurance company. 

Note ! 

ipEther232 is a Class A device. This device can cause interferences 

to radio communications in residential areas; in such cases the 

operator may be ordered to carry out and pay for appropriate 

measures. 

This warning does not apply to desktop housing or the OEM version 

w ithout housing. 

Subject o mod ificatio ns. 

Last Update27.02.04 

ipcas GmbH ipEther232.PPP V9.01 Page 2 of 32

Important Safety Information 

As is the case with all electrical equipment there are some basic 

safety precautions to be observed. These safety precautions are 

primarily for you own safety but also serve to prevent damage to 

the device. 

Settings not described in this guide and changes to the device 

electronics are to be carried out by an authorized vendor only. 

Read the user guide carefully and keep it to hand. 

Make sure that... 

Install the device 

• the device is placed on a stable, flat surface; 

• for rail mounted devices the top hat rail is sufficiently grounded 

and the rail spring has good contact; 

• the device is never placed near a heater or the air outlet of an 

air-conditioning unit; 

• the device is never exposed to direct sunlight; 

• the device is never in direct contact with liquids of any kind. 

Never use liquids in the vicinity of the device. 

• Opening the housing may lead to an electric shock and other 

damage. Never make any changes to the device that are not 

described in the user guide. This could result in damage to the 

device and you would have to pay for the repairs. Only the 

authorized vendor may modify the input voltage, should this 

become necessary. 

Make sure that... 

• the mains supply values are the same as the designation on the 

power supply unit. In case of doubt contact your supplier. 

• the mains is protected against surges and other disturbances. 

• the mains socket is located near the device and is easily 

accessible. 

• you pull the mains plug completely to disconnect. 

• the maximum power rating of an extension cable or multiple 

contact plug, if used, is not exceeded. 

• the mains cable is protected against damage. Do not place 

anything on the cable and put it down, so that there is no danger 

of stepping on or tripping over it. 

• a damaged mains cable is replaced immediately. 

• the mains cable is disconnected before starting to clean the 

device. Use a dry cloth only. Do not use any liquid or aerosol 

cleaning agent. 




Please follow all warnings and instructions displayed on the device itself 

and in accompanying manuals. In the manual, warnings of particular 

importance are marked by the symbols below. 

Warning and important information symbols 

NOTE: Text sections marked in this way contain supplementary information or hints. 

WARNING- Damage: This warns against possible damage to the device. Follow all 

instructions to avoid damage. 

CAUTION - Danger of Injury: This points out a possible source of danger. Follow all 

safety instructions to avoid injury. 

CAUTION - Hot: This points out a possible source of danger. Follow all safety 

instructions to avoid heat-related injury. 

CAUTION - Current: This points out a possible source of danger. Follow all safety 

instructions to avoid injury through electrocution. 




Contents 

Page 

Chapter 1: The Device .............................................................6 

1.1 Usage............................................................................................................................. 6 

1.2 Sockets.......................................................................................................................... 8 

Chapter2: Commissioning ipEther232.PPP......................9 

2.1 Commissioning............................................................................................................. 9 

2.2 Set the IP address....................................................................................................... 9 

2.3 Logfile...........................................................................................................................11 

2.4 Configuration...............................................................................................................13 

Chapter 3: Technical Details..............................................14 

3.1 Specifications..............................................................................................................15 

3.2 Pin Assignment...........................................................................................................16 

3.2.1 RS232 Connection Cable......................................................................................18 

3.2.2 Power Supply Units................................................................................................21 

3.2.3 RS232.Modem Module..........................................................................................21 

3.2.4 RS232 Module.........................................................................................................22 

3.2.5 RS485 Module.........................................................................................................22 

3.2.6 RS485 as a 2 Wire solution...................................................................................23 

3.3 Measurements............................................................................................................24 

3.4 Declaration of EEC Compliance..............................................................................27 

3.5 FAQ’s ...........................................................................................................................28 

3.6 Glossary.......................................................................................................................32 




Chapter 1: The Device 

1.1 Usage 

The PPP / Ethernet – Converter enables the transmission of network packets via 

a serial interface from and to the Ethernet (PPP = Point to Point Protocol). 

With ipEther232.PPP all these (serial) devices can be linked up to an Ethernet 

LAN via TCP/IP and thus also to the internet or your company intranet. 

The PPP gateway solution works with all operating systems and is compatible 

with existing PPP applications. You can start several services (ftp, telnet, www, 

ssh, rsh, rcp etc.) simultaneously via this transparent network connection. 

1.) "Ethernet for all" 

Ethernet capability for all TCP/IP 

enabled devices w ithout a dedicated 

Ethernet interface, such as: 

- Embedded PC 

- SPS 

- PC 

- Notebook 

- Modem 

- Router 

- Pa lm 




2.) "simple Network routing" 

Simple routing betw een two 

netw orks via GSM, ISDN or analog 

modems, for instance to link up a 

branch to the company LAN. 

3.) "dial in" 

Enables company LAN access for 

home office, remote maintenance or 

for field reps. 




1.2 Sockets 

ipEther232.PPP has three sockets: 

• Ethernet (10BaseT) for a 10/100 Mbit network 

• RS232 SUB-D 9 

• Power supply 9V DC or 24VDC or 48/60V DC 

A diagram of all connectors and their designation is displayed on the housing. 

RS232 

SUB-D 9 Pin 

Ethernet 

10/100 

RJ45 

9V DC 

The LEDs indicate the device state and have the following meaning: 

• POWER The device is switched on. 

• System Slow flashing indicates that at the moment there is no 

connection to a PC. Fast flashing indicates that the 

device is in use. 

• LINK LAN There is a physical connection to the network. 

• LAN Rx Packets are received via the Ethernet. 

• LAN Tx Packets are sent to the Ethernet. 

• V24 Rx Data is received via the RS232 line. 

• V24 Tx Data is sent via the RS232 line. 

• Error Errors have occured in the RS232 line. 




Chapter2: Commissioning ipEther232.PPP 

2.1 Commissioning 

Connect the device to the mains. The "Power" signal and the flashing "System" 

LED indicate that ipEther232 is ready for operation. 

ipEther232 is connected to the network via an RJ45 socket. 

The "Link LAN" LED (connection) indicates the connection to the LAN. 

If this is not the case, check the netwok connection or network line. 

The enclosed CD contains a modem driver set-up program and the configuration 

tool. The modem driver runs on all windows NT based operating systems, as well 

as Windows NT 4 from SP5, Windows 2000 and Windows XP. 

No PC reboot is necessary after installation. The configuration tool for configuring 

the device starts automatically after installation. 

For later configuration sessions the program is included in the 

"Program Files / ipEther232.Modem" folder. 

2.2 Set the IP address 

On delivery of ipEther232, no valid IP address has been set (Default: 10.10.5.1). 

To start with, each device must be allocated an unambiguous IP address. 

The IP address can be obtained from the network administrator. It must comply 

with your network and cannot be assigned twice. 

In order to set the IP address in your ipEther232, the device must be connected 

to its own network segment. If need be, connect the device via a "cross over" 

cable to the PC. 

The configuration program recognizes all devices in its own network segment, 

even if they do not have a valid IP address. Double-click on the device entry to 

call up a dialog, where you can enter a valid IP address and further 

configurations. 




The entry "State" has the follow ing meaning: 

• "not found" 

The device could not be located anymore. It is not connected, switched off or 

has been connected after a router blocking the UDP Port 3497. 

• "connected" 

The device has been located and can be addressed via the entered IP 

address. 

• "connected via router" 

The device has been located and installed after the router. The IP address 

cannot be changed. 

• "found but unreachable" 

The device has been located in the own network segment, but could not be 

accessed via the entered IP address. Check whether the entered IP address 

is valid for your network. 

• "in use" 

The device is in use at the moment. The parameters cannot be changed. 




If ipEther232s are connected after a router, they are not automatically detected. 

They must be entered manually ("Add manually"). This is done by entering their 

IP address. If the device can be accessed via this address, it is included in the 

list. 

If the device is installed after a router, the IP address cannot be changed. This 

prevents that the device accidentally becomes inaccessible. 

2.3 Logfile 

Any errors occurring during communication are written to a logfile ("Show 

Errors") for later analysis. You can find the errors in the "Programm- 

Path"\ERRORS.LOG file. 




2: ERR_RXDBufferOverrun 

The UART (RS232) receivebuffer is overruned. 

4: ERR_NICOv errun 

The NIC (Network Interface Controller) receivebuffer is overruned. 

5: ERR_SETUP_BAUD, 

6: ERR_SETUP_PARITY, 

7: ERR_SETUP_DATA 

The UART (RS232) parameter is incorrect. Please use the configurationtool 

to set the correct RS232 parameters. 

9: ERR_UART_OVERRUN 

Overrun Error Bit from received controlregister (UART) would be ignored. 

10: ERR_UART_FRAME 

Framing Error Bit from received controlregister (UART) would be ignored. 

18: ERR_NIC_INTERNAL 

The DMA operation on the networkcontroller (NIC) could not lead through. 

23: ERR_PPP_BUFFER_OVERRUN_ETH 

The Ethernet IP buffer is full. The incoming IP Packet has been ignored. 

24: ERR_PPP_BUFFER_OVERRUN_PPP 

The PPP (RS232) IP buffer is full. The incoming IP Packet has been ignored. 

25: ERR_PPP_INVALID_MESSAGE 

A wrong LCP or IPCP information would be received. The PPP Packet has 

been ignored. 

(Defaults for the PPP Protocol – RFC1661, RFC1662, RFC1332) 

28: ERR_PPP_CRC 

A PPP Packet with wrong checksum (FCS) has been received. This Packet 

has been ignored. 

31: PPP_IPCP_UP 

The LCP und IPCP authentication has been lead through. The PPP 

connection has been established. 

32: PPP_IPCP_DOWN 

The PPP connection has been disconnected. 

33: ERR_INVALID_CONFIG 

A invalid parameter would be established after the connect. In this case the 

defaultparameter would be loaded. Please execute the configurationtool 

again. If the MAC Address does no more agree please contact your 

34: ERR_WDT_ TIMEOUT 

Processorreset because of „Watchdog Timeout“ 

35: ERR_NORMAL_POWER_UP 

Processorreset because of „Watchdog Timeout“ 

36: ERR_MCLR_FROM_SLEEP 

Processorreset because of „SLEEP“ 

37: ERR_BROWNOUT_RESTART 

Prozessorreset auf Grund von Spannungsschwankungen 

Processorreset because of main disturbances 




2.4 Configuration 

The Configuration menu consists of five parts: 

TCP/IP (Ethernet): 

This tells you the device ID, i.e. the 

ipEther232.PPP serial number and the 

network settings for the Ethernet side are 

configured here. 

(Default Gateway or no Gateway = 0.0.0.0) 

TCP/IP (PPP): 

This is where you can set the IP address 

for the serial side, or specify that it comes 

from a DHCP server or from the Caller. 

Default here means that there is no 

synchronization between PPP partners 

with respect to the IP address. 

RS232: 

Baud rate, Parity and Stop bits are adapted 

to the communication behavior of the serial 

terminal device. 

The default 0 disables this function. 

Modem settings: 

The modem behavior is defined here. 

Typically the Hayes commands are used in 

the .init string for communicating with the 

modem. Please refer to your modem user 

guide for these commands. 

Enter the phone number of the call 

recipient in the appropriate field. "Idle 

timeout" specifies the time in minutes after 

which the modem disconnects. "Max. 

online" specifies the maximum time span 

after which the modem connection is cut. 

Completion to TCP/IP (PPP): 

• "MRU-Size" specifies the maximum IP packet size. The default is 1500. 

• "ASYNC-MAP". The entry format is hexadecimal code. Default is 0. 

• Magicnumber: Default: "Off”. 

• Protocol Compression: Default: "Off”. 

• Address Compression: Default: "Off”. 

The above parameters are described in more detail in the RFC-1661 and RFC-1662. 

Firmw are: 

This tells you the firmware release. You can update to the most current version. The latest 

firmware releases can be found under www.ipcas.de. We recommend that you update only 

when there is a real need to do so. 




Chapter 3: Technical Details 

Great emphasis was placed on compatability during device design. 

There are, however, some minor restrictions: 

• ipEther232.PPP can store 20 Ethernet packets that are then transmitted 

to the RS232 or the Ethernet side. If additional packets arrive before 

memory has been freed, the packet is discarded. This is however 

reported and written to the error logfile (see Config tool). The problem 

only occurs if too many connections are open at the same time or too 

many unacknowledged packets are sent at the same time (Windows size 

too large or UAP connections). 

• The ARP cache can hold 20 entries. If the PPP side requires more ARP 

entries, the oldest entry is deleted. This might however have an adverse 

effect on the performance. 

• ipEther232.PPP principally uses the "hardware handshake". 

• Should problems arise, we recommend testing the connection with Linux 

PPPD. 

• IPCP is not supported. 

UART 

The UART supports transmission speeds between 2400 baud and 115200 baud. 

Higher baud rates might result in data loss, if data is transmitted continuously. 

The device uses 8 Data bits and "no parity". 




3.1 Specifications 

Constructional execution 

Housing 

Measurements 

Weight: 

Desktop device 

DIN-Rail Unit 

Power suppl y 

Voltage supply 


DIN-Rail Unit –H24 


Capacit y 




External power supply 1 

AC voltage 

DC voltage 

Operati ng temperature 

Rel. Dampness 

External power supply 2 

AC voltage 

DC voltage 

Operati ng temperature 

Rel. Dampness 

Safet y class 

Climate tests 

Recommended operatingt emperat ure 

Operati ngtemperature li mit 

Store- and trans portt emperature 

Rel. Dampness 

Serial interface 

Connection 

Pin alloc ation 

Configuration 

Baud rate 

Parity 

Databits 

Stopbits 

Cable length in offic e environment 

At RS485 

Ethernet interface 

Connection 

TCP/IP 

Diagnosis (LED) 

Firmware 

Drivers 

Plastic housing 

See M easur ements 

approx. 150 g 

approx. 180 g 

approx. 180 g 

(AC – Versions on reply) 

9 V DC (8 – 14 V DC ± 5 %) 

24 V DC (18 – 36 V DC ± 5 %) 

60 V DC (18 – 72 V DC ± 5 %) 

Optionall y available: 18 - 48 V AC 

at nomi nal Voltage (typical t erm) 

9 V DC 80 mA ca. 0,8 W 

24 V DC 60 mA ca. 1,44 W 

60 V DC 40 mA ca. 2,4 W 

230 V AC 50 Hz approx. 6, 3 VA 

9 V DC approx. 2,25 VA 

0°C to +40°C 

5 % t o 90 % non-condensing 

100 – 240 V AC 50 / 60 Hz approx. 12, 6 VA 

9 V DC approx. 8,1 VA 

0°C to +40°C 


II / III 

+10°C to +50°C 

+5°C to +55°C 

-10°C to +70°C 


9-pin Sub-D Soc ket full alloc ation 

see Pi n alloc ation 

2400 to 115200 Baud 

None, Even, O dd, Mar k, Spac e 

7 or 8 Bits (Exc epti on 7N1) 

1 or 2 Bits 

RS232 up to 10 m 

RS485 up to 500m 

2 / 4 wire solution 

Transmit dat a optionall y ins ertabl e (RTS or CTS) 

10BaseT 

RJ45 

UDP Port 3497 

ICMP 

ARP 

Power, System, Error, Link, 

EthR xD, EthT xd 

Rs232 R xD, T xD 

Updat eable 

Setup & configurationtool 

for Windows NT4 / 2000 / XP 

Norms EN 55022/1998 

EN 50082-2/1997 




3.2 Pin Assignment 

SERIAL PORT 

RS232 DCE (Modem) 

DB9 Connector female 

Pin Direction Definition 

1 OUTPUT DCD Data Carrier Detect 

2 OUTPUT RXD Receive Data 

3 INPUT TXD Transmit Data 

4 INPUT DTR Data Terminal Ready 

5 GND Ground 

6 OUTPUT DSR Data Set Ready 

7 INPUT RTS Request To Send 

8 OUTPUT CTS Clear To Send 

9 OUTPUT RI Ring Indicator 

SERIAL PORT 

RS232 DTE (Computer) 

DB9 Connector male 


1 INPUT DCD Data Carrier Detect 

2 INPUT RXD Receive Data 

3 OUTPUT TXD Transmit Data 

4 OUTPUT DTR Data Terminal Ready 

5 GND Masse 

6 INPUT DSR Data Set Ready 

7 OUTPUT RTS Request To Send 

8 INPUT CTS Clear To Send 

9 INPUT RI Ring Indicator 

SERIAL PORT 

RS485 

DB9 Connector male 


1 NC 

2 OUTPUT TX+ (Send data) 

3 OUTPUT TX- (Send data) 

4 NC 

5 GND Masse 

6 INPUT RX+ (Receive Data) 

7 INPUT RX- (Receive Data) 

8 NC 

9 NC 




Ethernet Connector 

RJ 45 Pin Name Definition 

1 TX+ Transceive Data+ 

2 TX- Transceive Data- 

3 RX+ Receive Data+ 

4 n/c Not used 


6 RX- Receive Data- 






3.2.1 RS232 Connection Cable 

Whichever Device is used, you have to choose the complying connection cable. 

From the following graphics you can take out the information to your needed 

connection cable. 

(also shown at Chapter Pin Allocation) 

For ipEther232 und ipEther232.PPP "DTE-Device" 

For ipEther232.Modem "DCE-Dev ice" 




3.2.2 Pin Assignment ipEther232.PPP OEM 


ipEther V2.1 Pin assignment of interfaces: 



J1: LAN interface 

1 TX+ 3 RX+ 

2 TX- 6 RX- 

J4: RS232- / RS485 interface 

1 CD / - 6 DSR / RX+ 

2 RXD / TX+ 7 RTS / RX- 

3 TXD / TX- 8 CTS / - 

4 DTR / - 9 RI / - 

5 GND/GND 

J6: LAN interface (OEM) 

1 TX+ 3 RX+ 

2 TX- 4 RX- 

J7: LED interface (OEM) 

1 +5V 6 LED_LAN_RXD 

2 LED_POWER 7 LED_LAN_TXD 

3 LED_SYSTEM 8 LED_SYSTEM2 

4 LED_COM_TXD 9 LED_LAN_LINK 

5 LED_COM_RXD 10 GND 

J8: Module interface 

1 CD 6 RTS / RX- 

2 DSR / RX+ 7 TXD / TX- 

3 RXD / TX+ 8 DTR 

4 CTS 9 DTR_TTL 

5 RI 

J9: Module interface 

1 +5V 6 CTS_TTL 

2 GND 7 RI_TTL 

3 CD_TTL 8 RTS_TTL 

4 DSR_TTL 9 TXD_TTL 

5 RXD_TTL 

J10: RS232- / RS485 interface (OEM) 

1 CD / - 6 CTS / - 

2 DSR / RX+ 7 DTR / - 

3 RXD / TX+ 8 RI / - 

4 RTS / RX- 9 GND 

5 TXD / TX- 10 n/c 

JP6: Supply voltage input (OEM) 

1 GND 2 Vin+ (8 – 14 VDC) 

JP7: 5V Supply voltage input (OEM) 

1 GND 2 +5V 




3.2.2 Power Supply Units 

(18-36 V DC or 18-72 V DC with polarity protection) 

Remove all 4 jumpers (JP6 & JP7) and mount power 

supply unit with spacer and fastening screw. 

3.2.3 RS232.Modem Module 

Together with this module, ipEther232 is covered by 

the ipEther232.Modem user guide, they are 

mentioned here to complete the list. 

No optional settings. 




3.2.4 RS232 Module 

This user guide refers to the displayed module 

together with ipEther232.PPP 

No optional settings. 

3.2.5 RS485 Module 

This user guide covers ipEther232 used with this module. 

The RS485 transmitter can either be used in continuous operation, e.g. for pointto-point 

connections, or it can be triggered by software. This option is enabled by 

jumpers. 

The factory setting is continuous operation. 

RS485 Module 

Br. 3 

Br. 2 

Br. 1 

Jumper J. 1 J. 2 J. 3 

Transmitter in continuous - - X 

operation. 

switch on by DTR X - - 

switch on by RTS - X - 

X = closed 

- = open 




3.2.6 RS485 as a 2 Wire solution 

A closing of the cables with termination-networks is needed at RS485- 

connections to force the silencelevel on the bussystem while no datatransmitter is 

active. 

VCC 

RX+ 

TX+ 

R1 390 Ω 

R2 220 Ω 

RX+ 

TX+ 

RX- 

TX- 

R3 390 Ω 

RX- 

TX- 

GND 

Please take the pin allocation from the chapter 3.2 Pin Allocation 




Diagnosis p anel with 8 L EDs: 

SYSTEM 

RXD V24 

RX LAN 

LINK LAN 

- 

POWER 

V24 T XD 

LAN TX 

ERROR 

18,4 

RS232 DB9 Socket 

30,8 

Ethernet Connector 

10BaseT ( RJ45) 

15,2 

8,8 

6,2 

Power Supply 

14, 0 

11, 5 

1,5 

8,0 

12, 5 

13, 0 

15,1 

51, 0 

77,7 

Circuit Board 

90, 7 

100,0 

6,0 

4,0 

2,0 

2,0 

69, 1 

Subjec t t o modific ations 

3.3 Measurements 

Appr. 

1.009 Page 

1 

Gen. Tolerances: 

Datum 

Name 

Mod.. 15. 03. 02 P. Felbi nger 

Scale: 1 : 1 

ipEther232 (OEM V1) 

Creat.for 

: 

Page 

Creat.by: 

St. Modification Date Name Orig. 










3.4 Declaration of EEC Compliance 

is assured for the following product 

ipEther232 

This company confirms that the product complies with the main specifications for the 

protection against harmful interference laid down in the Council Guidelines on Harmonizing 

the Statutory Regulations of the Member States for Electromagnetic Compatibility 

(89/336/EEC). 

Any modifications to ipEther232 not authorized by this company invalidates this declaration. 

This product was tested and evaluated for electromagnetic compatibility in accordance with 

the following standards: 

EN 55022/1998 

EN 50082-2/1997 

Place/Date/Manufacturer's Signature: Erlangen, 09 April 2002 ________ 

____ 

Title of the Undersigned: 

Managing Director, Dipl.-Ing. Suganda Sutiono 




3.5 FAQ’s 

1. Generally: Do I have w ith each configuration (Virtual com port) on different 

workstations the IP to again configure? 

No, the IP of the Serial-Ethernet-Converter must be configured only on the 

first installation. But for any further Workstation you have to install the 

Virtual COM-Port driver. The IP-Address has to be the same, so that all 

already installed COM-Ports haven further function. 

2. Generally: Does ipEther232 function ov er routs? 

Yes, but for the first configuration you have to connect the Ethernet- 

Converter to the own Subnet. Afterwards you have also Router access over 

the Configuration-Tool (Add Device manually). 

3.Generally: 

4.Generally: 

5.Generally: 

6.Generally: 

7.Generally: 

8.Generally: 

9.Generally: 

10.Generally: 

11.Generally: 

Where can one configure the "subnet mask"? 

That is not necessarily, because the Virtual COM-Port driver use the 

Network-environment standard gateway and subnet mask. 

Is alternately used mode RS232/485 possible? How does one switch 

between RS232 and RS485? Do the two modes run over the same DB9 

Port? 

Alternate is not to be switched between these modes. RS232 and RS485 

have different bus drivers within the devices. But there are separate devices 

and order numbers. 

How many ipether232 can be managed with one w orkstation? 

Up to 254 Seral-Ethernetconverter (256 Com-Ports are possible but Com1 

and Com2 are physically already present). 

Why isn't the serial interface of the ipEther232 indicated in the device 

manager? 

The serial interface of the ipEther232 is not recognized in the device 

manager, because it concerns a virtual interface and not around a physical 

COM interface in the PC. 

Can serial devices be used with ipEther232 also via Internet? 

Yes, the ipEther232 makes the access possible to the serial device over the 

local Ethernet. The TCP/IP protocol is used for it. TCP/IP forms the basis of 

the Ethernet. 

Is it possible to build with only 2 wires communication between the 

RS485 interface of the ipEther232 and serial device on? 

It is possible. Please look for this in our manual in the section 3.2.6 RS485 

as a 2 wire solution (at present P. 21). 

Are there 2 wire solution for the ipEther232 with RS232 interface also? 

Yes. Only pin 2 (RXD Receiver Data), pin 3 (TXD Transmit Data) and mass 

(GND) are needed. In addition it can be necessary to activate of 

"NoModemSignals" in the Configtool. This can take place alternatively also 

via durable bridging of pin 4 (DTR Data Terminal Ready) and pin 6 (DSR 

Data Set Ready). For Pin allocation, please see the manual. 

Why doesn't the ipEther232 function with 1200 baud? 

The ipEther232 supports the speeds of 2400-115200 Baud. If you need 

1200 Baud, contact us please. 

Which supply v oltages are offered for ipEther232? 

9V DC, 18-36V DC, 18-27V DC 

Other tensions on request. 




12.Generally: 

13.Generally: 

How can I accomplish an analysis of my serial connection ov er 

ipEther232? 

You can use Tools like PortMon(serial connection) and CommView or 

Ethereal (network connection) for it. 

Why can it come to delays with ipEther232 during the serial 

transmission? 

Fig. 1 shows the delays during a serial direct connection. 

With the serial connection with ipEther232 an additional slight time delay is 

caused. This delay comes through the package running time in the Ethernet 

during the transmission over the network and their packing and unpacking. 

These short delays step on because not byte by byte on the network are 

sent, but Ethernet blocks are formed. 




14.Generally RS232: 

Which cable do I have to use for the connection of ipEther232? 

Depending upon used device you must select the appropriate lead. Out of 

the diagrams lying down, please take the information to your needed cable. 

For ipEther232 and ipEther232.PPP "DTE-Device" 

For ipEther232.Modem "DCE-Dev ice" 





How long may the line be? 

The RS485 line may be maximally 500 meters. 

How many participants can be attached to the RS485 bus system? 

It can be attached up to 32 Participants. 

Does every RS485 interface receive an own IP-address? 

No. Because several senders work together at the same line, it must be 

protected via a protocol that maximum one data sender is active on same 

time. All other senders must be at this time in high-impedance status. 

Does every RS485 interface receive an own IP-address? 

No. Because several senders work together at the same line, it must be 

protected via a protocol that maximum one data sender is active on same 

time. All other senders must be at this time in high-impedance status. 




19. ipEther232: Is it possible to be accessed from several computers at the same time 

to one v irtual Com-Port? 

No, only one computer has access ability at the same time. All further 

receive the message: "ACCESS Denied" (program-specific expenditure). 

20. ipEther232.PPP: Is it possible to handing over ipEther232.PPP the announcing 

information (username and passw ord)? 

No, password examinations such as PAP or Chap are momentarily yet not 

supported by ipEther232.PPP. 

21. ipEther232.PPP: Can I connect tw o netw orks w ith your products? 

Yes with two ipEther232.PPP which steer a simple routing via GSM -, ISDN 

-, or analog modems. 

22. ipEther232.PPP: How can I make a serial device Ethernet able (TCP/IP-able)? 

With ipEther232.PPP. PPP must be configured for this (under Linux: pppd, 

under Windows: Telecommunications connection.) P.S.: If only the serial 

device can accessed, it can be used ipEther232 (virtual Com haven), too. 

23. Tools: PortMon (GUI-Tool for monitoring all serial port activity on a system.) 

PortMon. Sometimes with all serially attached devices it can come to 

groundless communication problems. In such a case it is helpfully be 

supervised and analyzed the data communication to the serial device to 

eliminate possible errors. 

Portmon is a GUI/device driver combination that monitors and displays all 

serial and parallel port activity on a system. (For a clearly Analysis it should 

be only one device monitored.) 

Download PortMon: 

http://www.sysinternals.com/ntw2k/freeware/portmon.shtml 

24. Tools: Ethereal or CommView (programs for the monitoring of the netw ork 

(LAN).) 

Ethereal or CommView. In some cases communication between network 

and ipEther232 functions not as desired. To find out whyy, there are 

software tools such as Ethereal or CommView. 

Ethereal is a free network protocol analyzer. It allows you to examine data 

from a live network or from a capture file on disk. (For a clearly Analysis it 

should be only needed transmission paths monitored.) 

Download Ethereal: http://www.ethereal.com/distribution/win32/ 

CommView is a program for monitoring Internet and Local Area Network 

(LAN) activity capable of capturing and analyzing network packets. 

Download CommView: http://www.tamos.com/download/ 




3.6 Glossary 

ARP 

bps 

CTS 

DHCP 

DSR 

DTE 

DTR 

HTTP 

ICMP 

IEEE 

IP 

LAN 

MAC 

PC 

PPP 

RTS 

SNMP 

TCP 

TFTP 

UART 

UDP 

Address Resolution Protocol 

Bits per second (also known as the baud rate) 

Clear to Send 

Dynamic Host Configuration Protocol 

Data Set Ready 

Data Terminal Equipment 

Data Terminal Ready 

HyperText Transfer Protocol 

Internet Control Message Protocol 

Institute (of) Electrical (and) Electronic Engineers 

Internet Protocol 

Local Area Network 

Media Access Control 

Personal Computer 

Point to Point Protocol 

RequestTo Send 

Simple Network Management Protocol 

Transmission Control Protocol 

Trivial File Transfer Protocol 

Universal Asynchronous Receiver/Transmitter 

User Datagram Protocol 

Contact 

ipcas GmbH 

Wetterkreuz 17 Telef ax: +49 9131 7677 78 

D-91058 Erlangen Internet: http://www.ipcas.de 

Telef on: +49 9131 7677 0 E-Mail: inf o@ipcas.de 

Support: 0900/1472274 

Support: ipEther-support@ipcas.de

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