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Up Next in Introduction to Allen Bradley PLCs - RSLogix 500

  • 32. Downloading the Program

    Now, we download the ladder program to the simulator.

    We can see that the program will be downloaded to the Emulator at Node 0.

    A prompt asks if we want to go “Online” once we download the program to the “Emulator”.

    In the “RSLogix 500” window, we see that the ladder icon is “spinning”, and ...

  • 33. Testing the Program

    The timer, “T4:0”, runs once and times out. Because the “Done” bit remains true, the “ADD” instruction continues to execute and increment the value of “N7:0”. When it reaches 10, it does reset.

    However, the “ADD” instruction runs every scan instead of just once every 5 seconds.

    This is not wha...

  • 34. Modifying the Logic

    So, what do we need to do to fix the logic?

    We see that the timer ran once and stopped. We wanted it to run to the preset value and then restart.

    To do this, we need to add an “XIO” instruction, so that when the timer preset is reached and the “DONE” bit is set, the timer is reset and starts o...