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| 2/25/2010 10:53 AM | |
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Easy to explain! 1) To get the extra features of the on-board LOGO! LCD display and also for the LOGO! TD, you must enable these advanced features from the FILE menu "Message Text Settings" and 'Use new features' 2) It is MUCH easier to program LOGO! in Function Block Diagram (FBD) than LAD. 3) Every Function Block in LOGO! must have an output connected for it to work correctly after a compile and download to a real/physical LOGO! 4) The program will work in simulation WIHTOUT these connected outputs, but it will not compile and download. 5) For digial outputs (like the Message Text), you can use - an output (Q1 - Q16), but this is a waste or you do not want to do this. - a digital marker/flag, but this is also a waste of a useful resource for other programming - an OPEN CONNECTOR (X). This is the best way. 6) If you have many message texts, you can terminate them all wiht only 1 Open Connector, if you put some OR gates in front of the X 7) Make a small exampl program with 1 digital input to enable a messgae text, and the message text connected to an Open Connector (X) - do this in FBD, then convert it to LAD with the converter button on the menu bar. 8) Then you will see how to do this termination wiht an Open Connector in LAD. (see attached pictures) Hope this helps and you can understand it! Aaaaaarrrrgggghhh! ("Have a nice day!") LOGO!Barbarian AttachmentMessageText_OpenConnector_FBD_LAD.pdf (518 Downloads) |
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