RMC Ethernet Settings Page

To access the Ethernet Settings Page:
In the Project pane, expand the Modules folder, double-click the desired CPU module and click Ethernet.

Use this page to configure the IP address and Ethernet settings of the RMC75E, RMC150E, and RMC200. For more details on these settings, see the Understanding IP Addressing, RMC Ethernet Setup and Setting Up a Standalone TCP/IP Network topics.

IP Settings

Use this section to specify the RMC's IP Address. The Current IP Address box will show the RMC's current IP address settings if RMCTools is online with the RMC.

In nearly all applications you will choose Use the following IP address option, and enter the IP address and subnet mask.

Click Use the following IP address.
Enter an IP address and a subnet mask in dotted decimal notation (e.g. 192.168.0.5 and 255.255.255.0). To learn about IP addressing or setting up a stand-alone network, refer to Understanding IP Addressing and Setting Up a Standalone TCP/IP Network.
The Default Gateway is optional. If you choose not to use it, leave it blank, and the RMC will not be able to communicate with devices on networks other than its own. Otherwise, enter a value in dotted decimal notation (e.g. 192.168.0.1)

View IP Settings for PC

If your RMC will be running on the same network as the PC, you can click View IP Settings for PC to view the IP settings of the network so that you can configure the RMC's settings to be compatible.

Obtaining an IP address automatically

The RMC allows options for automatically receiving it's IP address from a BOOTP or DHCP server. These options are not desirable for machine control, since the server can change the RMC's IP address, and any controlling device, such as a PLC, will not know the new address. Or, if there is a problem with the server, the RMC will not be able to comuunicate.

Most office networks have a DHCP server. If you are using the RMC in an office environment for learning and setup, you may wish to use the DHCP option to easily assign an IP address and subnet mask.

Allow changing IP address over Ethernet (changes over USB are always allowed)

Checking this box will allow the IP settings to be changed through an Ethernet connection. Notice that the IP settings can always be set via RMCTools when connected to the RMC via USB.

Notice that not allowing IP settings to be changed via Ethernet will also prevent PLCs and HMIs from changing the IP settings over Ethernet. As a result, the controller will no longer comply with services in the PROFINET and EtherNet/IP protocols that change the IP address or reset the IP settings to default values. For full PROFINET and EtherNet/IP compliance, this box shall be checked. However, in RMC75/150 controllers prior to firmware version 3.55.0, this checkbox did not affect PROFINET.

Not allowing the IP settings to be changed over Ethernet prevents accidentally changing the IP settings from RMCTools when connected over Ethernet. If they are accidentally changed, then the connection will be broken, which can be very frustrating if programming the RMC remotely.

Allow changing IP address from CPU display (RMC200 only)

Checking this box will allow the IP address to be changed from the RMC200 Display Screen. If this box is unchecked, updating the IP Address can only be viewed on the Display Screen.

Ethernet Protocol Mode (RMC200 Only)

For EtherNet/IP I/O or PROFINET I/O communications, the RMC200 must be set to the corresponding mode. The RMC200 requires a mode selection in order to optimize packets for these communications. Only one of these I/O modes may be active at any time:

EtherNet/IP mode
This mode is optimized for handling EtherNet/IP I/O packets. It also enables Device Level Ring (DLR) as the ring management protocol to support ring topology. PROFINET I/O connections are not supported in this mode.
PROFINET mode
This mode is optimized for handling PROFINET I/O packets. It also enables Media Redundancy Protocol (MRP) as the ring management protocol to support ring topology. EtherNet/IP I/O connections are not supported in this mode, but EtherNet/IP messaging is still supported.

As shown below, in each mode, all other protocols are still fully supported, including CSP, Modbus/TCP, Mitsubishi Procedure Exist, FINS, and DMCP.

Application Protocols	EtherNet/IP Mode	PROFINET Mode
EtherNet/IP Messaging
EtherNet/IP I/O
PROFINET I/O
Modbus/TCP
CSP (DF1 over Ethernet)
Omron FINS
Mitsubishi Procedure Exist
DMCP
Network Management Protocols	EtherNet/IP Mode	PROFINET Mode
SNMPv1, SNMPv2c
LLDP
Ring Management Protocols	EtherNet/IP Mode	PROFINET Mode
DLR (Device Level Ring)
MRP (Media Redundancy Protocol)

The current Ethernet Protocol Mode may also be viewed from the Display Screen by browsing to Ethernet > Protocol Mode.

Ethernet Settings

The RMC automatically detects the speed and duplex settings of the network and uses auto-crossover (Auto-MDIX) if necessary to match the port type (MDI/MDI-X). If you wish to manually set these items, click Manually set speed and duplex and choose the settings. For the RMC75/150, the manual option will also disable auto-crossover.

The RMC200 has individual settings for each of the two Ethernet ports, and the option to disable a port. Notice that the RMC200 will not communicate with a 10 Mbps switch.

Additional Options

IP Address Collision Detection (ACD)

IP Address Collision Detection (ACD) is a feature that detects duplicate IP addresses. When a device with ACD enabled is brought online—either on power up or when the Ethernet cable is plugged in—the device will query the network to see if its IP address is in use. If the IP address is already in use, then the device will give up its IP address and set its Net LED to solid red to indicate that a duplicate IP address was detected. All of this is done without disrupting devices already communicating on the network.

The only downside of using ACD is that it takes the device approximately one second longer before it is able to use its IP address. In most applications this is an acceptable delay given the benefits of IP ACD. However, in situations where the IP address must be available quickly and the risk of duplicate IP addresses is deemed low, users may elect to disable Address Collision Detection. Changes to the IP Address Collision Detection setting requires restarting the controller to take effect.

Delta does not recommend disabling IP Address Collision Detection (ACD).

Allow updating firmware over Ethernet

Checking this box will allow the firmware to be updated via Ethernet. If this box is unchecked, updating the firmware will only be allowed via USB.

If the Allow changing IP address over Ethernet box is not checked, then this check box cannot be changed via Ethernet.

Communication Status

Click Open Communication Status for a summary and statistics of the Ethernet communications. See the Communication Statistics topic for more details.