Issue
How do you update the M241 or M251 firmware using SoMachine or EcoStruxure Machine Expert Controller Assistant?

Product Line
Modicon M241 PLC
Modicon M251 PLC
EcoStruxure Machine Expert / SoMachine v4.1 or higher

Environment
EcoStruxure Machine Expert / SoMachine - Controller Assistant tool in Windows

Resolution
There are two methods of updating the M241/M251 firmware.
Below are the instructions for M241/M251 Firmware Update using SoMachine Controller Assistant:

[Method 1 - SD Card]

1. Use a SD Card that has been Formatted Fat32
2. From SoMachine Central > Select Maintenance
3. Select Controller Assistant
4. Select Update Firmware..
5. Choose the controller Type M241 or M251 (don't get these mixed up from the pick list
6. Select the Latest Firmware and the correct Controller
7. Select Next
8. Select Next
9. Select Write to..
10. Select Write
11. After it completes the Write.
12. Select Close
13. Eject the SD Card.
14. Power off the M251
15. Insert the SD card.
16. Power on M251
17. SD light should be flashing.
18. After about 3 minutes
19. SD Light should be now on Solid.
20. Power off M251 and remove SD card.

[Method 2 - Ethernet or USB cable connected to the SoMachine Network]

1. Use a SD Card that has been Formatted Fat32
2. From SoMachine Central > Select Maintenance
3. Select Controller Assistant
4. Select Update Firmware..
5. Controller Type M241/M251
6. Select the Latest Firmware and the correct Controller
7. Select Next
8. Select Next
9. Select Write to Controller...
10. Select the Controller from the list of devices on the SoMachine Network by double-clicking on it
11. Click "Connect"
12. A progress bar will appear. Wait until the transfer is complete
13. Wait until the RUN light is flashing steadily after completion
14. Follow steps 1 to 9 (or find the Controller Selection screen in SoMachine) and observe the Firmware Version column to confirm the firmware version is up to date

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