Step-by-step

For purposes of this example, we will change the TCP/IP settings to operate within the default network for the LMD, which is in the 192.168.33.xxx address space.

  1. Ensure your computer “Local Area Connection” port matches the IP Address structure of the motor you wish to upgrade. All Lexium MDrive motors ship from the factory at a default of 192.168.33.1. See This Tutorial.
  2. Launch the Ethernet Interface utility from the Lexium Software Suite screen.
  3. Go to the “Adapter (NIC)” drop-down in the upper left and select the correct the adapter the LMD is connected to. If followed instructions above then the selected should be 192.168.33.100.
    • If it does not appear hit the IP address is not present click the “Refresh” button next to the drop-down. Choose the connected adapter and click “Select”. If done successfully the network address should show above the refresh and select buttons.
  4. To connect to a new motor straight from the factory, the default IP addresses for all our Ethernet TCP/IP products is192.168.33.1. Set the Port to 503, and have the TCP button selected. Click “Connect”.
  5.  There will be two connected status indicators. The upper right “Connect” button will be green and change to “Disconnect”. There will also be a message on the status bar indicating the selected NIC adapter is connected to the Motor IP address.
  6. Click the “Read All” button to populate the fields.
  7. Simply change the IP address and then hit the “Write” button. In this scenario, the IP address is changed from 192.168.33.1 to 192.168.33.26. If you were commissioning the device into a machine you would set it to the address defining its target location in the machine.
  8. After clicking the “Write” button, the string “!OK” will be appended to the parameter block title. There is no message/notification/prompt that pops asking you if you wish to change the motors IP address.
    • Follow the same steps if you need to modify the subnet mask or add a gateway address.
  9. Click the “Disconnect” button.
  10. Cycle power to the Lexium MDrive by removing power from the AC side of the supply.

At this point, the device would be ready to be placed in a machine. You may may verify by reconnecting to the LMD using the new IP address, providing the network adapter is configured to match the target network parameters.

Step-by-step: setting up your PC

  1. Ensure your computer “Local Area Connection” port matches the IP Address structure of the motor you wish to upgrade. All Lexium MDrive motors ship from the factory at a default of 192.168.33.1.
  2. If you need assistance in setting up your IP settings to be able to communicate continue reading otherwise scroll down to “Configuring the Motor’s IP Address”.
  3. If the LMD motor has already been changed to a different address, then the following steps will differ slightly. Primarily, the IP address and the subnet mask, ensure they are within the same parameters as the motor.
  4. On a Windows 7 computer, you can access the Local Area Connection Properties by doing the following:
  5. From the “Start” Icon in the lower left-hand corner of your desktop, locate your Control Panel. If you do not see the control panel button, simply type control panel after hitting the windows key.
  6. Open the Control Panel and locate the “Network Sharing Center”
  7. Open the Network Sharing Center and select “Change Adapter Settings”
  8. Locate the “Local Area Connection” and double-click.
  9. Double click on “Internet Protocol Version 4 (TCP/IPv4)
  10. Select the “Use the Following IP Address” radio button and enter the following information: 192.168.33.xxx. With xxx being any value between 0-255 except for 1.
  11. After entering in the above IP Address and Subnet Mask information select “OK”
  12. You have now configured your computer to talk to other devices on a network that has an IP structure that starts with 192.168.x.x

Ethernet/IP Communications examples for RS Logix 5000 to Run on a CompactLogix L23E PLC These two examples are done using version 17 of RS Logix 5000.  Both examples use implicit Messaging as well as Explicit Messaging.  Example 1 is meant for a minimally configured LMDOE42x while the larger one is configured for an LMDCE57x or LMDCE85x.  Their function does not vary when running on an IP-65 drive with M12 circular connectors or an IP-20 drive with pluggable terminal strips.  The logic is designed to show the functions in a way that allows the toggling of a single bit while providing a place in the rung to enter/monitor the data being sent/received.

 

Lexium MDriveMDrive

Single interface

Wiring diagram:  Full duplex (4-wire) only

lnd422single
Figure 1: Single Lexium MDrive full duplex point-to-point configuration

 Notes and checkpoints

  • Ensure the crossover between the interface and Lexium MDrive (Rx—Tx / Tx—Rx)
  • Ensure the crossover between the interface and Lexium MDrive (Rx—Tx / Tx—Rx)
  • Ground is galvanically isolated on the Lexium MDrive
  • If using a pre-made cable, verify wire color to pin location – when in doubt, ring it out

Party mode interface

Party mode is an advanced communications configuration requiring a working knowledge of the ANSI/TIA/EIA-422 and TIA/EIA-485 standards, as well as SEM MDrive products and the MCode programming and control language.

lexium-mdrive-422-multipoint
Figure 2: Lexium MDrive RS-422 multipoint system, bus and stub configuration

Single interface

Wiring diagram:  Full duplex (4-wire) only

Single MDrivePlus/MForce - full duplex connection
Figure 1: Single MDrivePlus/MForce – full duplex point-to-point connection

  Notes and checkpoints

  • Ensure the crossover between the interface and Lexium MDrive (Rx—Tx / Tx—Rx)
  • Ensure the crossover between the interface and Lexium MDrive (Rx—Tx / Tx—Rx)
  • Ground is galvanically isolated on the Lexium MDrive
  • If using a pre-made cable, verify wire color to pin location – when in doubt, ring it out.

Party mode interface

Party mode is an advanced communications configuration requiring a working knowledge of the ANSI/TIA/EIA-422 and TIA/EIA-485 standards, as well as SEM MDrive products and the MCode programming and control language. The diagram below shows a bus and stub type network configuration, MDrive/MForce RD and RL style connectors provide an additional signal contact point for daisy-chain configurations.

MDrive/MForce RS-422 multipoint network
Figure 2: MDrive/MForce RS-422 multipoint network, bus and stub configuration

 

 Causes

The motor power supply input common (GND) is connected internally to the common of the communication port. When two or more units are connected in the party mode, or multi-drop configuration, a “ground loop” is created.

This occurs because the common (communication ground) which connects the communication ports of all connected devices is in parallel with the system power common. This can allow the motor power current to flow through the communication port of another device and vice versa.

Figure 1 shows this recirculation where I1 represents the total current, I2 is return current through the power ground path, and I3 is the current recirculating through the communication ground path.

Recriculating currents in RS-422 multipoint system
Figure 1: Recirculating currents in RS-422 multipoint system
 Solution

Eliminating the recirculating current in this system is accomplished quite easily by:

  • Using an isolated communication converter such as the MD-CC40x-001.*
  • Connecting the isolated ground of the communication converter direct to power ground.
  • Leave the communication ground pin on the device open. Communications will still be grounded via power common without the path for recirculating currents.

Figure 2 shows an example of this connection scheme.

Recirculating currents eliminated
Figure 2: Recirculating currents eliminated