Molly Ayala
Resetting a Schneider Electric PLC depends on the model. For example, to reset a Twido PLC to factory settings, you must connect an ethernet crossover cable directly from a PC to Twido, configure your PC network connection to automatically obtain IP address, launch Wireshark, and click on the first button on the toolbar, List the available capture interfaces.... To reset a SmartX IP controller device, press and hold the reset button for 20 to 29 seconds. If you wish to reset access to an M580 CPU so that a new program can be loaded, you can try connecting to the CPU using USB and pressing Shift + F2 at the same time when the window prompting password entry appears.
Characteristics and Values Table for Resetting a Schneider Electric PLC
| Characteristics | Values |
|---|---|
| Resetting a M580 CPU | Power down the CPU/rack. Place the module in slot 1, not slot 0. Power up the rack and wait for a steady LED pattern. Connect to the module via USB and download a valid application. |
| Resetting a Twido PLC to Factory Settings | 1. Connect an ethernet crossover cable from a PC to Twido. 2. Configure the PC network connection to "automatically obtain IP address." 3. Launch Wireshark and click the first button on the toolbar, "List the available capture interfaces." 4. Click the Start button next to the appropriate interface of the network card. 5. Wireshark will list/capture every packet on the network. |
| Resetting a SmartX IP Controller | Press and hold the reset button for 20-29 seconds. A factory reset may take up to 30 seconds to process. All diagnostic logs and the database are erased, but the controller firmware remains the same. |
| Resetting Access to Load a New Program | Connect to the PLC and download an application without a password. Press Enter but keep the password area clear. |
| Recovering a Project in the CPU Without the Password | Connect to the CPU using USB. Press "Shift" + "F2" simultaneously to generate a long string of characters. Send this to the technical support team to generate a one-off recovery password. |
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What You'll Learn
Resetting a Twido PLC to factory settings
- Connect an ethernet crossover cable directly from a PC to the Twido PLC.
- Configure your PC's network settings to allow communication between the PC and the Twido controller.
- Open TwidoSoft or TwidoSuite on your PC and locate your program or project.
- In TwidoSoft, right-click on the program in the Browser pane and select "Scan Mode Edit". Tick the box that says "Automatic Start In Run" and cycle the power.
- In TwidoSuite, click "Project" in the top left corner, then click "Configure Behavior" in the top right corner.
- Stop the running live capture after the Twido has fully booted.
- Look for packets that show ARP under the "Protocol" column. If connected directly, there should only be two devices with ARP calls: your PC and the Twido.
- Under the "Info" column, find the IP address of the Twido, which will be displayed as "Who has xxx.xxx.xxx.xxx?".
Additionally, if you wish to clear the program from the CPU and reset it to factory defaults, you can follow these supplementary steps:
- Select the PLC option from the menu, then choose "Backup" and "Clear Backup".
- Exit the program without saving the application.
- Power down the PLC. With no backup, the PLC program will be cleared, returning it to factory settings.
If you encounter any issues during the reset process, it is recommended to refer to Schneider Electric's customer care team for further assistance and technical support.
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Resetting a SmartX IP controller
If your SmartX IP controller device seems completely unresponsive, you can perform a factory reset to restore the device. After you release the reset button, a factory reset may take up to 30 seconds to process. All diagnostic logs and the database are erased during a factory reset, but the controller firmware does not revert and remains at the same active level.
To perform a factory reset using the hardware reset button, press and hold the reset button for 20 to 29 seconds. If your controller is equipped with the MP-C Display add-on module, a count-up timer and progress bar will be displayed to assist in reset selection. There is also a reset mode indicator that lets you know which reset occurs if you release the button at that time.
Note that from EcoStruxure Building Operation v3.1, there is a facility to remotely factory reset a SmartX IP Controller device.
You can also use the Device Restart function of the eCommission SmartX Controllers mobile application to perform a warm or cold restart of the SmartX IP controller. The restart instructs a BACnet device to reboot itself, and the device retains all configuration data. Retention of run-time data, including values, is dependent on the default or user-defined retention configuration. Trend data is restored following the restart.
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Resetting a M580 CPU
Resetting the CPU Password:
If you have the application password and wish to clear it to regain access:
- Power down the rack if it is a hot standby module.
- Change the rotary switch on the back of the module to the "reset" position.
- Replace the module and power up the rack and CPU.
- Wait for about a minute until the LED pattern becomes steady.
- Power down the rack again.
- Change the rotary switch back to either the A or B setting.
- Place the module back into the rack and power it up.
Resetting Access for a New Program:
If you need to reset access to load a new program:
- Power down the CPU/rack for a standalone module.
- Place the module in slot 1, not slot 0.
- Power up the rack and wait for approximately a minute until the LED pattern is steady.
- Connect to the module via USB and download a valid application.
- Power down the module and move the CPU to slot 0.
- You should now be able to connect to the CPU and load a new program.
Clearing the Program from the CPU:
To clear the program and reset the CPU to factory defaults:
- Select the PLC option from the menu, then choose "backup" and "clear backup."
- Exit the program without saving the application.
- Power down the PLC; without a backup, the PLC program will be cleared as per the factory default settings.
Recovering the Project without a Password:
If you need to recover the project in the CPU but do not have the password:
- Connect to the CPU using a USB cable.
- When the password entry window appears, press "Shift" + "F2" simultaneously.
- Copy the long string of characters that appears.
- Provide this string to the global level 3 technical support team, who will generate a one-off recovery password.
- Once you receive the password, you can access the CPU and download the project.
Please note that these steps are based on a CPU of version 3.21, and the process may vary for different versions or in cases where the CPU has failed. Always exercise caution when performing any reset procedures, and ensure you have the appropriate authorizations.
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Resetting access to a new program
Twido PLC
To reset a Twido PLC device to factory settings, you must first connect an ethernet crossover cable directly from a PC to the Twido. Next, configure your PC's network connection to "automatically obtain an IP address". Then, launch Wireshark and click on the first button on the toolbar, labelled "List the available capture interfaces...". After this, click the "Start" button next to the appropriate interface of your network card. This will vary depending on the manufacturer of your PC. Wireshark will now start listing/capturing every packet it sees on the network.
M580 CPU
If the CPU is a standalone module, power down the CPU/rack. Place the module in slot 1, not slot 0. Power up the rack and wait for around a minute until the LED pattern is steady. Connect to the module via USB and download a valid application. Power down the module and move the CPU to slot 0. If the CPU is a standalone safety module, the steps are similar. Power down the rack, move the co-processor to slot 0 (not slot 2), and move the CPU to slot 2 (not slot 0). Power up the rack and connect using the USB programming cable. Download a simple configuration project for the PLC, ensuring it downloads. Power down the rack, move the CPU to slot 0, and move the co-processor to slot 2. Power up the rack again.
SmartX IP Controller
To perform a factory reset on a SmartX IP Controller, press and hold the reset button for 20 to 29 seconds. After releasing the button, the factory reset may take up to 30 seconds to process. All diagnostic logs and the database will be erased during a factory reset, but the controller firmware will remain at the same active level.
MP Series Controller
The MP Series Controller can be reset and restarted in different ways, depending on how long you press the reset button. The resets and restarts will affect the retention of values after the restart, based on the retain levels configured for the variables. You can use a straightened segment of a paper clip or a similar tool to press the reset button.
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Resetting a CPU to clear its program
Power Down the CPU
Begin by powering down the CPU. If it is a standalone module, power down the entire rack. This is an important first step to ensure that there is no risk of data loss or corruption during the reset process.
Re-Slot the CPU
Once the CPU is powered down, you may need to re-slot it. If the CPU is usually in slot 0, move it to slot 1 or 2. This step may vary depending on the specific model and setup of your CPU.
Power Up and Connect
After re-slotting, power up the rack again. Wait for about a minute until the LED pattern stabilizes and becomes steady. Then, connect to the CPU via a USB cable. You may need to download and install any necessary drivers to recognize the CPU connection.
Clear the Program
Now, you can proceed to clear the program from the CPU. This can be done in a few ways. One method is to select the PLC option from the menu, choose the backup option, and then select "clear backup." Ensure you do not save the application. Another method is to remove the backup memory battery and any EEPROM (Electrically Erasable Programmable Read-Only Memory) to ensure the program is truly cleared.
Reset to Factory Defaults
Finally, to reset the CPU to its factory defaults, reattach the battery. Ensure there is no EEPROM fitted, or it will reload the previous program. Your CPU should now be reset with a cleared program, ready for a new one to be installed.
It is important to note that some CPUs may have additional security measures, such as passwords, which may require additional steps to reset and clear the program. Always ensure you have the necessary permissions and expertise before attempting to reset any CPU to avoid data loss or damage.
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Frequently asked questions
Connect an ethernet crossover cable from a PC to Twido, configure your PC network connection to "automatically obtain IP address", launch Wireshark, and click the first button on the toolbar "List the available capture interfaces".
Connect to the PLC and download an application. This may require pressing the enter button, but keep the password area clear.
Connect to the CPU using USB and when the window prompting password entry appears, press "Shift + F2" at the same time. Copy the long string of characters that appear and send it to the global level 3 technical support team to generate a one-off recovery password.
Press and hold the reset button for 20-29 seconds. After releasing the button, the factory reset may take up to 30 seconds to process.
Power down the CPU/rack. Place the module in slot 1, not slot 0. Power up the rack and wait for a steady LED pattern. Connect to the module via USB and download a valid application. Power down the module and move the CPU to slot 0.
