Q: What are the types of I/O?
A: I/O can be either dedicated or programmable. Dedicated I/O are factory set and cannot be changed. Usually, this type of I/O can include trigger, strobe out, product change, product select, power and ground. Programmable I/O can have its purpose changed. This type can include general output, pass, fail, ready, error and general input.
Q: What is the “Ready” output used for?
A: The ready output turns on when the PresencePLUS sensor is ready to run the next inspection. You can use the ready output as a way to avoid missed triggers. Do this by only triggering the vision sensor when the PLC or inspection station has received a ready signal from the vision sensor.
Q: When do I use the “General” output?
A: There are two reasons for using the general output. The first is for output delay or pulsed output. The second is if you want to assign the output to a specific test tool – or if you want to use an output for anything other than pass, fail, ready or error.
Q: Why doesn't the Product Select/Change function work?
A: The Product Select/Change option is not activated from the factory. To activate the product select/change option:
For PRO Users only: To change inspection, activate the Product Select inputs for at least 1 ms before the Product Change input is pulsed, at least 1 ms. Keep the Product Select inputs active during the Product Change pulse.
- Go to the Run screen
- Click on the Select tab
- Choose Hardware input
Q: Can I continuously trigger the sensor through the software?
A: No, PresencePLUS sensors require an external trigger. However, you can create a hardware continuous trigger. Set one of the outputs to "Ready" and wire this output back to the trigger input.
Q: How do I configure an output to pulse?
A: Only a general output can have an output duration (also known as pulse) set to a specific time length. Outputs for pass, fail, ready, and sensor error can only be latched.
To configure the output to pulse on pass:
Note: If more than one test tool is needed, add a final test tool to logically AND the previous test tools together.
- Go to the “InputOutput” tab in the system window.
- Configure the desired output as a general output.
- Set the time duration (pulse) in ms.
- Create the inspection.
- Make a final test tool that includes all the passing tolerances.
- Set the "output" in the final test tool to the number of the I/O assigned in step 2.
To tell the sensor when to pulse on fail, do the previous steps to #5 and then:
- Add an additional test tool.
- Uncheck Pass/Fail contribution.
- Input1 = the previous test tool.
- Invert input1.
- Select the output number you wish to initiate from the output drop down box.
Q: Does the PresencePLUS have a continuous trigger?
A: No, but you can simulate a continuous trigger by wiring the Ready output to the Trigger input. This way, the sensor can trigger itself.
Q: Why can’t I select Output Duration (pulse) or Delay from a Fail output?
A: Only general outputs can have a pulse or delay. Reconfigure your output from Fail to General. For more information, go to the Question: How do I configure a pass or fail output to pulse.