TL140
Lifetime Supporting Member
hi guys,
I have been task with modifying a machine. We are taking out some cameras and putting in photoeyes for part present sensors. There are 3 other fixtures that serve the same purpose, with the exact same logic in them, and they use photoeyes. Why they put cameras on the third fixture? No idea. It's overkill for a part present sensor. especially since the other fixtures have proved fantastic for functionality. The cameras have proved nothing but trouble and have caused tremendous amounts of downtime for us. The resolution is a bit low, and the area is not well lit. Therefore the ambient lighting from dayshift to nightshift has proved problematic. Anyways, enough about the cameras..
I have taken my time with making sure the logic is correct and like the other subroutines, but there is one thing i'm unsure about.
I found a rung with a SQI and SQO on it. I have a vague sense of what they do, but I wanted to make sure because this project could be this maintenance man's ticket to engineering.
So the SQI is basically a IF-THEN statement checking conditions, and the SQO is basically a MOV command with an increment for position?
All the numbers seem to be in a pattern. The arrays have the sequence with the first two numbers the same, the third number has bit [X].10 turned on, and then the fourth bit is the same as the first two.
I have been task with modifying a machine. We are taking out some cameras and putting in photoeyes for part present sensors. There are 3 other fixtures that serve the same purpose, with the exact same logic in them, and they use photoeyes. Why they put cameras on the third fixture? No idea. It's overkill for a part present sensor. especially since the other fixtures have proved fantastic for functionality. The cameras have proved nothing but trouble and have caused tremendous amounts of downtime for us. The resolution is a bit low, and the area is not well lit. Therefore the ambient lighting from dayshift to nightshift has proved problematic. Anyways, enough about the cameras..
I have taken my time with making sure the logic is correct and like the other subroutines, but there is one thing i'm unsure about.
I found a rung with a SQI and SQO on it. I have a vague sense of what they do, but I wanted to make sure because this project could be this maintenance man's ticket to engineering.
So the SQI is basically a IF-THEN statement checking conditions, and the SQO is basically a MOV command with an increment for position?
All the numbers seem to be in a pattern. The arrays have the sequence with the first two numbers the same, the third number has bit [X].10 turned on, and then the fourth bit is the same as the first two.