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ipEther232 generall
Generally FAQ for all ipEther232 products
How can I check whether the set virtual COM port exists in the system?
With the command mode, from the command shell. See screenshot.
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What can I do when the COM port is already being used?
Use another one.
With the command mode, you can find out which COM port is still free.
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Can control characters and the local echo be switched off with the ipEther232.Modem?
The answer is yes. For this, you have the items "Quiet mode (Q1)" and "Echo (E1)" in the configuration tool. Alternatively, these functions also can be switched on and off with AT commands.
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Why does the (red) ERROR LED light up?
1. The ipEther232 processes only Ethernet packages with a MTU of 1500 bytes.
Packages of other protocols that are larger than MTU 1500, e.g. RIP, IGRP (used for routers), cannot be processed. Consequently, the ERROR LED lights up. The functionality, however, is not affected because these packages are not intended for the
ipEther232.
2. When the virtual COM port is closed, the red LED lights up for ½ second.
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Why is UDP (User Datagram Protocol) used?
UDP offers a substantially better performance for ipEther232 than TCP/IP.
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Is the ipEther232 and/or the port 3497 protected against hacker attacks?
There is no 100% protection from hacker attacks for any Internet-accessible network equipment.
However, the ipEther232 uses its own protocol, and password protection can be set. This ensures stronger protection than many other network devices have.
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Is it also possible to use ipEther232 beyond firewalls? Does this also apply to firewalls with NAT?
Yes, it is possible. The Firewall must only be configured in such a way that the IP address assigned to ipEther232 and the port 3497 is enabled in both directions.
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Use correct procedures for firmware updates!
Please read the Readme in the Download area of your ipEther product.
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Why do delays occur with ipEther232 during serial transmission?
Fig. 1 shows the delays during a serial direct connection.
Fig. 1
An additional slight delay is caused
with the serial connection to ipEther232 during transmission over the network. This delay is due to the packing and unpacking of packages as well as their running time in the Ethernet.
These short delays occur because they are not transmitted in the network byte by byte but rather in formed Ethernet blocks.
See Fig. 2
Fig. 2
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Which supply voltages are offered for ipEther232?
9V DC, 18-36V DC, 18-27V D. Other voltages available on request.
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Why doesn't the ipEther232 function with 1200 bauds?
The ipEther232 supports a speed range of 2400-115200 bauds. If you require a baud rate of 1200, please contact us.
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Is there also a 2-wire solution for the ipEther232 with RS232 interface?
Yes, ther is. Only pin 2 (RXD Receiver Data), pin 3 (TXD Transmit Data) and mass (GND) are required. In addition, it may be necessary to activate "NoModemSignals" in the config tool. Alternatively, this can be achieved by durably bridging pin 4 (DTR Data Terminal Ready) and pin 6 (DSR Data Set Ready). For Pin allocation, please consult the manual.
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Can I establish communication between the RS485 interface of the ipEther232 and a serial device with only 2 wires?
It is possible. Please consult our manual, section RS485 using a 2 wire solution.
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Does ipEther232 support the use of serial devices via Internet?
Yes, the ipEther232 makes enables access to the serial device over the local Ethernet. The TCP/IP protocol on which the Internet is based is used for this.
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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 is a virtual interface and not a physical COM interface in a PC.
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How many ipether232 can be connected to one workstation?
Up to 254 seral Ethernet converters (256 Com ports are possible, but Com1 and Com2 are already physically assigned).
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Is an RS232/485 alternating mode possible? How do you switch between RS232 and RS485? Do both modes run over the same DB9 port?
You cannot switch between these modes. RS232 and RS485 have different bus drivers within the devices. They constitute separate devices with different purchse order numbers.
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Where can I configure the "subnet mask / gateway"?
This is not necessary because the Virtual COM port driver already uses the network environment standard gateway and subnet mask.
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Voltage supply
The power supply must be free of overvoltages or other disturbances. Otherwise the equipment could be damaged.
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Correct interfaces handling
The interfaces must be free of overvoltage, voltage diferences and other disturbances, otherwise the equipment could be damaged.
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Does ipEther232 function over routers?
Yes, but for initial configuration you have to connect the Ethernet converter to its own subnet. Subsequently, you may also access the network via routers through the configuration tool (Add device manually).
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Do I have to configure the IP every time I configure (Virtual com port) on a different workstation?
No, the IP of the serial to Ethernet converter only must be configured during the first installation. For any further workstation, you only have to install the virtual COM port driver. The IP address has to remain the same for already installed COM ports to function.
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I have an ipEther232 and would like to convert the firmware to that of ipEther232.Modem.
Firmware coversion from ipEther232 to ipEther232.Modem is not yet possible due to the different hardware used. This is due to the different kinds of hardware involved in the bus driver modules (Reference: Interface DTE/DCE).
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