7
Project planning and startup with MOVITOOLS
®
MotionStudio
Startup of the fieldbus at the DHR21B/41B controller
Manual – DHE/DHF/DHR21B (standard) and DHE/DHF/DHR41B (advanced)
59
Initial startup
If the EtherNet/IP and Modbus/TCP protocol is set using the DIP switch, the default
protocol for the DHR21B/41B option will be "DHCP" (Dynamic Host Configuration
Protocol). This means that the option card expects its IP address parameters from a
DHCP server.
INFORMATION
There is a free DHCP server available on the Rockwell Automation homepage. The
tool is known as "BOOTP Utility" and can be downloaded from the following website:
http://www.ab.com/networks/bootp.html.
Once the DHCP server has been configured and the settings have been made for the
subnet mask and the standard gateway, the DHR21B/41B option card must be inser-
ted in the assignment list of the DHCP server. In doing so, the MAC ID of the
DHR21B/41B option card is allocated a valid IP address.
INFORMATION
The configured IP address parameters are adopted permanently by the parameter
set when DHCP is deactivated after the IP address has been assigned.
Changing IP address parameters after initial startup
If the DHR21B/41B option card was started using a valid IP address, you can also ac-
cess the IP address parameters via the Ethernet interface.
You can change the IP address parameters via Ethernet by one of the following meth-
ods:
• With the MOVITOOLS
®
MotionStudio engineering software
• Using the EtherNet/IP
TM
TCP/IP interface object (see chapter "EtherNet/IP CIP ob-
ject directory")
• With the SEW Address Editor
You can also change IP address parameters via the other interface of the
DHR21B/41B option card.
If the IP address parameters of the DHR21B/41B option card are assigned via a
DHCP server, you can only change the parameters by adjusting the settings of the
DHCP server.
The methods listed above for changing the IP address parameters only come into ef-
fect once the supply voltage (DC24V) has been switched off and back on again.
Deactivating/activating DHCP
The type of IP address assignment is determined by the setting of the attribute Config-
uration Control of the EtherNet/IP
TM
TCP/IP interface object. The value is displayed or
changed in the parameter P785 DHCP/Startup Configuration.
• "Stored IP parameters" setting
The stored IP address parameters are used.
• "DHCP" setting
The IP address parameters are requested by a DHCP server.
If you use the DHCP server from Rockwell Automation, you can activate or deac-
tivate the DHCP by clicking a button. In this case, an EtherNet/IP
TM
telegram is
sent to the TCP/IP interface object of the station that is being addressed.
22900055/EN – 08/2016
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