gordie
Member
Hello everyone;
Have been trying to learn PLCs and have bought a copy of logic pro from the learning pit. I am only just started and am at the door simulator which has a door which goes up and down on motors. I had no problem doing this but cleaning up is putting things to a halt. In the last part they want the door to stop if in the down button is pressed while in the up motion and visa versa. I think this is done with a little more finess than I am used to and the student exercise hints that I should be using binary and interger tables along with my otu and otl statements??? " If the door is currently opening, pressing the Close Switch will immediately halt movement. Door movement will remain halted when the switch is released.
If the door is currently closing, pressing the Open Switch will immediately halt movement. Door movement will remain halted when the switch is released.
Once movement is halted by the either of the foregoing actions, the operating criteria associated with the previous exercise will again take effect.
The utilization of Binary or Integer Table bits to Flag specific conditions within your program would be appropriate. Also, the retentive OTL and OTU instructions may be utilized freely at your discretion.Can anyone give a small sample of utilizing these commands? I appreciate any reply and hope this question makes some sense to some one out there Thanks very much - Gordie
Have been trying to learn PLCs and have bought a copy of logic pro from the learning pit. I am only just started and am at the door simulator which has a door which goes up and down on motors. I had no problem doing this but cleaning up is putting things to a halt. In the last part they want the door to stop if in the down button is pressed while in the up motion and visa versa. I think this is done with a little more finess than I am used to and the student exercise hints that I should be using binary and interger tables along with my otu and otl statements??? " If the door is currently opening, pressing the Close Switch will immediately halt movement. Door movement will remain halted when the switch is released.
If the door is currently closing, pressing the Open Switch will immediately halt movement. Door movement will remain halted when the switch is released.
Once movement is halted by the either of the foregoing actions, the operating criteria associated with the previous exercise will again take effect.
The utilization of Binary or Integer Table bits to Flag specific conditions within your program would be appropriate. Also, the retentive OTL and OTU instructions may be utilized freely at your discretion.Can anyone give a small sample of utilizing these commands? I appreciate any reply and hope this question makes some sense to some one out there Thanks very much - Gordie