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How to use the communication ports of the GE 90 – 70 Series PLC?

by helen•

Hey there! I’m a supplier of the GE 90 – 70 Series PLC. Today, I’m gonna share with you how to use the communication ports of these awesome PLCs. GE 90-70 Series PLC

First off, let’s talk about why the communication ports on the GE 90 – 70 Series PLC are so important. These ports are like the bridges that connect the PLC to other devices, such as computers, HMIs (Human – Machine Interfaces), and other industrial equipment. They allow data to flow back and forth, enabling us to program, monitor, and control the PLC effectively.

Types of Communication Ports

The GE 90 – 70 Series PLC comes with different types of communication ports, each with its own features and uses.

Serial Ports

Serial ports are one of the most common types. They’re great for simple, point – to – point connections. You can use them to connect the PLC to a computer for programming. For example, if you want to upload a new program to the PLC or download data from it, a serial port can do the job.

To use a serial port, you’ll need a serial cable. Make sure the cable is compatible with the port on the PLC. Usually, you’ll set the communication parameters like baud rate, parity, and stop bits according to the requirements of your system. For instance, a common baud rate might be 9600 bps, with no parity and one stop bit.

Ethernet Ports

Ethernet ports are becoming more and more popular in industrial applications. They offer high – speed data transfer and the ability to connect to a network. With an Ethernet port, you can connect the PLC to a local area network (LAN), which allows multiple devices to communicate with the PLC simultaneously.

To use an Ethernet port, you need to configure the IP address of the PLC. This is like giving the PLC an address on the network so that other devices can find it. You can use a DHCP server to automatically assign an IP address, or you can set a static IP address manually. Once the IP address is set, you can use software like FactoryTalk View to access and monitor the PLC over the network.

Setting Up the Communication Ports

Now, let’s get into the nitty – gritty of setting up these ports.

Serial Port Setup

  1. First, connect the serial cable between the PLC and your computer. Make sure the cable is securely plugged in.
  2. Open the programming software on your computer. In the software, go to the communication settings.
  3. Select the serial port that you’re using. You might see options like COM1, COM2, etc. on a Windows computer.
  4. Set the communication parameters. As I mentioned before, you’ll need to set the baud rate, parity, and stop bits. Double – check these settings to make sure they match the requirements of your system.
  5. Test the connection. Try to establish a connection between the computer and the PLC. If everything is set up correctly, you should be able to communicate with the PLC.

Ethernet Port Setup

  1. Connect an Ethernet cable between the PLC and your network switch. Make sure the cable is working properly.
  2. Open the configuration software for the PLC. In the software, go to the network settings.
  3. If you’re using DHCP, make sure the DHCP option is enabled. If you want to set a static IP address, enter the IP address, subnet mask, and gateway information.
  4. Save the settings. After you’ve entered the information, save the settings in the PLC.
  5. Test the connection. Try to ping the PLC from another device on the network. If you get a response, it means the connection is working.

Troubleshooting Communication Port Issues

Sometimes, things don’t go as smoothly as we’d like. Here are some common issues and how to fix them.

Serial Port Issues

  • No communication: Check the cable connections. Make sure the cable is properly plugged in at both ends. Also, check the communication parameters. If they’re not set correctly, the PLC and the computer won’t be able to communicate.
  • Data corruption: This could be due to a noisy environment or a faulty cable. Try using a shielded cable to reduce interference. You can also try changing the baud rate to a lower value.

Ethernet Port Issues

  • IP address conflicts: If you get an IP address conflict error, it means another device on the network has the same IP address as the PLC. You can either change the IP address of the PLC or check other devices on the network to make sure there are no conflicts.
  • Network connectivity problems: Check the Ethernet cable and the network switch. Make sure the cable is working and the switch is powered on. You can also try restarting the PLC and the network devices.

Using Communication Ports for Different Applications

The communication ports on the GE 90 – 70 Series PLC can be used for a variety of applications.

Programming

As I mentioned earlier, you can use the serial or Ethernet ports to program the PLC. You can write ladder logic programs, install new firmware, and make changes to the existing programs.

Monitoring

With the communication ports, you can monitor the status of the PLC in real – time. You can view the input and output values, error messages, and other important information. This is very useful for troubleshooting and maintenance.

Control

You can use the communication ports to send control commands to the PLC. For example, you can start or stop a motor, open or close a valve, or adjust the speed of a conveyor belt.

In conclusion, the communication ports on the GE 90 – 70 Series PLC are very powerful tools. By understanding how to use them, you can make the most of your PLC and improve the efficiency of your industrial processes.

Bently Nevada 3300 Series and 3300 XL Proximity Probe If you’re interested in purchasing the GE 90 – 70 Series PLC or have any questions about its communication ports, feel free to reach out to me. I’m here to help you make the right choice for your business.

References

  • GE 90 – 70 Series PLC User Manual
  • Industrial Automation Communication Protocols Handbook

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