Configuring the FDR Address Server

About the FDR Service

The communications module includes a fast device replacement () server. That server provides operating parameter settings to replacement Ethernet devices that are equipped with FDR client functionality.

Any networked Ethernet device that is equipped with FDR client functionality can subscribe to the communications module’s FDR service. The module can store up to 1 MB of FDR client operating parameter files. When this file storage capacity is reached, the module cannot store any additional client FDR files.

The communications module can store FDR client files for up to 128 devices, depending on the size of each stored file. For example, if the size of each FDR client file is small (not more than 8 KB) the module could store up to the maximum of 128 parameter files.

In an M580 Hot Standby system, the PRM files managed by the FDR server in both modules are synchronized when the applications in both PACs are the same. Refer to the discussion of FDR in Hot Standby systems in the Modicon M580 Hot Standby System Planning Guide for Frequently Used Architectures.

FDR Address Server Configuration

Configure the address server service with the Control Expert to set IP parameters for an device that is based on a unique name (device name) or the MAC address of the device:

Step	Action
1	Enable the Address Server on the Services page.
2	Expand (+) Services and select Address Server.
3	In the FDR Server menu, scroll to Enabled to enable the FDR server.
4	View these tables: Automatically Added Devices: This table shows the devices (and the corresponding IP addresses) that are automatically included in the module configuration. Manually Added Devices: This table shows the devices (and the corresponding IP addresses) that you add to the module configuration. NOTE: The automatic and manual addition of devices are described below. The same IP address cannot appear in both the Manually Added Devices table and the Automatically Added Devices table.
5	Press a button to finish: Apply: Save changes with the window open. OK: Save changes and close the window.

This service also allows a device to store the configuration of the communications module in local non-volatile memory. The address server automatically provides correct network and device parameters for replacement devices without stopping the process.

Manually Adding Remote Devices to the DHCP Service

You can manually add a device DTM that corresponds to a device in the Device List to the address server service of the communications module. Devices that are equipped with or client software can be added.

Add devices to the Manually Added Devices list:

Step	Action
1	In the Address Server page, click the Add button to add a new row to the list of Manually Added Devices.
2	In the new row, configure these parameters for the client device: IP Address: Double-click the cell in the IP address column and enter an IP address for the client device. Identifier Type: Scroll to the type of value that the client device uses to identify itself to the FDR server: MAC Address Device Name Identifier: Depending upon the identifier type, enter the client device setting for the MAC address or name. Mask: Enter the client device subnet mask. Gateway: Enter the gateway address that remote devices can use to communicate with devices located on other networks. Use 0.0.0.0 if remote devices do not communicate with devices on other networks.

Step

Action

In the Address Server page, click the Add button to add a new row to the list of Manually Added Devices.

In the new row, configure these parameters for the client device:

IP Address: Double-click the cell in the IP address column and enter an IP address for the client device.
Identifier Type: Scroll to the type of value that the client device uses to identify itself to the FDR server:
- MAC Address
- Device Name
Identifier: Depending upon the identifier type, enter the client device setting for the MAC address or name.
Mask: Enter the client device subnet mask.
Gateway: Enter the gateway address that remote devices can use to communicate with devices located on other networks. Use 0.0.0.0 if remote devices do not communicate with devices on other networks.

Viewing the Auto-Generated Client List

The Automatically Added Devices table automatically displays a list of devices that fit these criteria:

The devices correspond to a device in the Device List.
The devices subscribe to the Ethernet communications module’s IP addressing service.

NOTE: You cannot add devices to this list in this page. Instead, use the configuration pages for the remote device to subscribe to this service.

These columns appear in the Automatically Added Devices list:

Column	Description
Device No	This number is assigned to the device in the Control Expert configuration.
IP Address	This address corresponds to the client device.
DHCP	TRUE indicates that the device subscribes to the DHCP service.
Identifier Type	Identifier Type: This is the type of value that the client device uses to identify itself to the FDR server: MAC address Device Name
Identifier	This is the MAC address or device name.
Netmask	This is the subnet mask of the client device.
Gateway	This is the IP address of the network device that a DHCP client device uses to access other devices that are not located on the local subnet. A value of 0.0.0.0 constrains the DHCP client device by allowing it to communicate only with devices on the local subnet.

Example: DHCP Server Providing IP Addresses for Local and Remote Subnets

Refer to the appendix for an example of configuring a DHCP server to provide IP addresses to devices in local and remote subnets.