Posted 31 Jul 2015 Hi guys, i'm working in a project of a Mitsubishi PLC (FX) , i want to make a program ladder that controls two independent motors one at a time, the standby motor automatically starts in case of failure (coupur energy, default) the first engine. i program with gx iec developer 7.04, the 2 motors are switch on by (enable1,enable2). Thanks in advance Share this post Link to post Share on other sites
Posted 31 Jul 2015 First of all; do you have a feedback from the motors so you actually know if motor1 has stopped and you need to start motor2? Share this post Link to post Share on other sites
Posted 1 Aug 2015 (edited) i don't have a feedback from motors, I need a program,i want to make it so that if the main motor is running and the temperature sensor reaches (1 or 8 C°) the opposite motor will start automatically and the original motor will shut down . Both motors can never run at the same time. inputs: Enable1,Enable2,sensor. outputs:2 motors. note: don't worry about the sensor you can consider it as an ordinary input what interests me is how to make the switching of two motors Edited 1 Aug 2015 by medensat Share this post Link to post Share on other sites
Posted 2 Aug 2015 You need to compare the input temperature with a setpoint. If setpoint "high" is reached, then use a SET for motor2, and a RST for motor1. The same goes for the other way around (when setpoint "low" is reached, SET motor1 and RST motor2). Share this post Link to post Share on other sites