![]() Therefore, once OpenPLC initiates a communication, the first attempt to send a message to the board fails because the Arduino board is still booting after a reset. The Arduino boards have an auto-reset feature that resets the board every time a new USB connection is made. If you see two or three communication timeout messages on the dashboard, don’t worry, this is normal. ![]() OpenPLC is communicating with the board and reading/writing to its I/O points. See the Rx/Tx LEDs of your Arduino board blinking constantly. Everything else should be filled up for you automaticallyĭepending on the selection of your Device Type.Ĭlick on “Save device” and you’re good to go! Just start the PLC and you will Select the proper Arduino board you have connected under Device Type and the On the new screen that appears, fill out the name for your slave device (itĬan be anything, but just please avoid non-English characters like ç, é, ó, ñ), Web interface, go to Slave Devices on the menu and click on “Add new device”. Launch OpenPLC Runtime on your host, log in on the ![]() Mega | ADK | Due Add a Slave Device to OpenPLCĪfter programming your Arduino with OpenPLC’s firmware, you now need to add Your board, unzip it, and upload it to your Arduino using the Arduino IDE. Just download the proper version of the firmware for ![]() Page to have it installed and then move to the next step. You can use any of the listedĭevices on the Getting Started page as a host. Runtime installed on your system to proceed. Given that Arduino boards can only work as slave devices, the first thing you Points at all (in case of OpenPLC running on Windows for example). This is particularly useful for systems that don’t have any I/O You can attach Arduino boards as slave devices to expand the number of your Please refer to for the most up to date information about the OpenPLC Project. It is kept in here for historical purposes only. Stepper2.moveTo(-stepper2.The information on this website is outdated. Stepper1.moveTo(-stepper1.currentPosition()) Define some steppers and the pins the will useĪccelStepper stepper1(1, 3, 6) // Stepper Y (Stage 2) 1 = Control by a dedicated driver board (DRV8825) 3 = Arduino pin connected to STEP 6 = Arduino pin connected to DIRĪccelStepper stepper2(1, 2, 5) // Stepper X (Stage 1) My question is can I simply change the sketch to make the shield work on a Mega (not a Uno)? Perhaps by changing the pin number? #include I previously set up steppers using the Mega 2560 and a breadboard prior to ordering the shield (which is a neater set up) and motors worked OK I have also read the post (about GRBL) about different port mapping but I do not understand ports. I have looked at the Forum notes on comparison of the two Arduinos and the color coded diagram of differences but it is not obvious to me that differences are significant for the CNC shield. I have read in the forum about pinouts on Uno and Mega not being the same. I have attached the code I used to test the motors based on AccelStepper.īut I need some analog inputs for sensors (shield covers Uno input pins) so I tried to use a Mega 2560 by just transferring the shield to the Mega and altering the sketch to Mega. I set it up with 2 steppers and a DRV8825 Arduino shield from Protoneer on a Uno. I have a robotic arm project using stepper motors Using a Mega 2560 instead of a Uno with a CNC Shield
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