X20 system modules • Bus controllers • X20BC0087
X20 system User's Manual 3.10
545
4.5.8.7 Modbus/TCP network address switch
Switch position
Description
0x00
This switch position is the factory default setting. In this position, the address switches have no effect on system parame-
ters. The bus controller parameters in flash memory are used (IP address and port number). The bus controller is started
with factory default values if valid flash data is not present.
0x01 - 0x7F
The last position of the IP address saved in flash memory is changed to the address switch value. The IP address saved
in flash memory is not changed. The port number is read from flash memory.
0x80 - 0xEF
When set within this range, the bus controller runs in DHCP mode. The current hostname is then passed on to the DNS
server. A hostname is generated according to how the address switches are set.
The generated hostname is made up of three elements:
"br" + "mb" + address switch value (three decimal places).
Example
This means, for example, that the following hostname is generated for address switch setting 0xD7 (dec.
215): "brmb215"
0xF0
Auto Store mode: The IP settings are taken from the DHCP or BooTP server. If the IP settings differ from the values
stored in the flash memory, then the current IP parameters are saved.
This function is only available with Firmware version >= 1.39.
0xF1 - 0xFD
Reserved (same function as position 0xFF)
0xFE
Initializes all bus controller parameters with default values during booting. No values are read from flash memory. The
communication parameters correspond to the values assigned with switch setting 0xFF.
0xFF
Initializes all communication parameters with default values. All other bus controller parameters are read from flash mem-
ory.
Default parameters:
•
IP address:
192.168.100.1
•
Subnet mask:
255.255.255.0
•
Gateway:
192.168.100.254
•
Primary NetBIOS name:
"br" + MAC address
•
Secondary NetBIOS name:
"br" + "mb" + address switch value (decimal)
•
Port number:
502
•
X2X Link configuration:
4 ms cycle time
•
X2X Link cable length:
0 m
Table 150: Network address switch values
4.5.8.8 Setting the IP address (default value)
Changes to the network address switches are only applied after a restart. If the bus controller is restarted with
the address switch value 0xFF, it is initialized with the IP address 192.168.100.1. This address is also the factory
default setting. The port number is set to 502 (reserved for Modbus).
This IP address can be used to establish a connection to the bus controller. The internationally unique MAC address
is listed on the housing side of the bus controller. The combination of "br" and the MAC address results in a unique
name (primary NetBIOS name) that also makes it possible to access the bus controller.
Example of the primary NetBIOS name:
MAC address:
00-60-65-00-49-02
Resulting NetBIOS name:
br006065004902
This means that, without additional parameter changes, either the default IP address 192.168.100.1 or the NetBIOS
name "br+MAC" can be used to communicate with the controller.
Since NetBIOS is being used, the bus controller can only be accessed via this name if there are no intermediary
routers or gateways in the way.
Summary of Contents for X20 System
Page 2: ......