![]() ![]() Solution of Exercise #1: I am reproducing below the criteria provided in the LogixPro Exercise #1 in the Door Simulation exercises: Pressing the Open Switch will cause the door to move upwards (open) if not already fully open. It is assumed that that the motor direction can be changed by changing voltage polarity through suitable wiring using contactors. Because door movement is not maintained when either switch is released, there is no need to use seal-in contacts. However, it is assumed that all other Inputs and Outputs in the LogixPro Door Simulator are available and are therefore used in solving the problem. Therefore the STOP switch is not required and is not used in solving the problem. Movement will not be maintained when either switch is released. The OPEN_D and CLOSE_D push buttons are used to control the movement of the door. When the door is fully closed, both limit switches are closed. As soon as the door starts moving down, the top limit switch (LS1) closes. When the garage door is fully open, the contacts of both limit switches are OPEN. First, note a few things about the limit switches as well as the problem itself: The limit switches use “Normally Open” switches. Thus, this is the problem I have solved and explained below. The closest one I could find is Exercise #1. Hi Mike: I looked through the Door Simulation exercises to determine which one you referred to in your email.
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