Channel Properties - TCP/IP Page

Description

Use the TCP/IP page to:

select a Configuration mode, which specifies how the communication module obtains its IP addressing settings, and
edit the IP addressing settings that will be used if the Configuration mode is set to Static

NOTE: The settings made in this page can either match or conflict with the manual settings made using the 2 rotary switches on the back of the module. See the Resolving Conflicting Hardware and Software IP Address Settings topic for an explanation of when IP addressing conflicts exist and how the module resolves them.

The TCP/IP page looks like this:

To display this page, select the Channel Properties → TCP/IP node in the navigation tree located on the left side of the Device Editor.

NOTE: Refer to the topic Configuring Properties in the Device Editor for instructions on how to edit properties.

Properties

The IP addressing properties you can configure in this page depends upon the selected configuration mode:

Property	Description	Configuration Mode Options
Scanner IP Address	The 32-bit identifier — consisting of both a network address and a host address — assigned to a device connected to a TCP/IP Internet network using the Internet Protocol (IP).	Static Flash memory BOOTP DHCP
Sub-Network Mask	The 32-bit value used to hide (or mask) the network portion of the IP address and thereby reveal the host address of a device on a network using the IP protocol.	Static
Gateway Address	The address of a device, if any, that serves as a gateway to the communication module.	Static
Name	The device name. NOTE: The default device name, based on the rotary switch settings is BMX_0401_xxy. where: xx is the value of the upper switch setting (tens) y is the value of the lower switch setting (ones)	DHCP

Selecting a Configuration Mode

Use the Configuration list to specify a configuration mode. The configuration mode setting determines how the communication module obtains its IP address at startup. Choices are:

Configuration Mode	Description
Static	The module uses the scanner IP address, gateway IP address, and sub-network mask configured in this page.
Flash Memory	The module uses the IP address configured via the TCP/IP object and stored flash memory. An IP address configured by this process survives both a warm and a cold re-start.
BOOTP	The module uses an IP address assigned by a BOOTP server.
DHCP1	The module uses an IP address assigned by a DHCP server.

Default Address Configurations

The communication module uses a default address configuration when it is not configured or when a duplicate IP address is detected. The default address is based on the MAC address of the module and makes it possible for several Schneider Electric devices to use their default network configuration on the same network.

The module uses the following default address configurations:

Default IP Address

This default address starts with 10.10 and uses the last two bytes of the MAC address. As an example, a device with the MAC address of 00:00:54:10:8A:05 has a default IP address of 10.10.138.5 (0x8A=138, 0x05=5).
Default Sub-Network Mask

The default address is 255.0.0.0 (a class A mask).
Default Gateway Address

The default gateway address is identical to the default IP address.

Duplicate Address Checking

Before going online, the module sends out at least 4 ARP (address resolution protocol) messages with a proposed IP address:

if an answer is returned:
- another network device is already using the proposed IP address
- the module will not use the proposed IP address, but will instead use the default IP address
if an answer is not returned:
- the module is assigned the proposed IP address (along with the associated network parameters.)

NOTE: When powering up an entire network, some switches may be slow to complete the power up process. This can cause some ARP messages to be dropped. To help avoid this situation, Schneider Electric recommends that, when powering up an entire network, confirm that every network switch completes its power up cycle before powering up the PLCs.

Resolving Conflicting Hardware and Software IP Address Settings

The following table summarizes the status of the Ethernet channel depending on the Configuration Mode set in the application, and the positions of the 2 rotary switches on the back of the module:

Application: Configuration Mode	Rotary Switch Position
Application: Configuration Mode	DHCP1	BOOTP	STORED	CLEAR IP
<no configuration>	No Conflict: Get IP address from DHCP server using device name from rotary switches. Start basic services only.	No Conflict: Get IP address from BOOTP server. Start basic services only.	No Conflict: Get IP address from: flash memory — or — BOOTP server — or — use default IP address Start basic services only.	No Conflict: Use default IP address. Start basic services only.
Static or Flash memory	Conflict: Get IP address from DHCP server using device name from rotary switches. Start basic services only.	Conflict: Get IP address from BOOTP server. Start basic services only.	No Conflict: Get IP address from the application. Start services configured in the application.
DHCP or BOOTP with no configured device name	No Conflict: Get IP address from DHCP server using device name from rotary switches. Start services configured in the application.	No Conflict: Get IP address from BOOTP server. Start services configured in the application.	No Conflict: Get IP address from BOOTP server. Start services configured in the application.
DHCP with a configured device name	Conflict (if device name on switches differs from name in application) or No Conflict: if names are equal. Get IP address from DHCP server using device name from rotary switches. If conflict, start basic services only; If no conflict, start services configured in the application.	Conflict: Get IP address from BOOTP server. Start basic services only.	No Conflict: Get IP address from DHCP server using device name from application. Start services configured in the application.
1. Based on device name BMX_0401_xxy, where x = the top rotary switch, and y represents the bottom rotary switch.

Basic Services

The following services are provided by the module when it is using its default IP address:

FTP server (used for firmware download)
HTTP/Web server
Modbus/TCP server
EtherNet/IP explicit message server
SNMP agent
RSTP

NOTE: Using the module as a messaging server, when the module is using its default IP address, is not recommended. The module will replace the default IP address with a served or user-configured IP address as soon as one is received.