kolyur
Lifetime Supporting Member + Moderator
Has anyone had success programming the LCD screen on the 1100? I've been working with this for awhile and have discovered that if you're on a screen set up for data entry, you sometimes have to press the ESC or OK buttons twice before it will allow you to exit the screen. This causes problems if you're using an integer register to track which screen you're on, because the register will index at the first button press but the data input screen will remain shown (even if another LCD instruction has executed) until the button is pressed again. When it finally exits the data entry screen, it sometimes skips over the intended screen due to the extra button presses. I've tried all kinds of kludge logic (timers, counters, intermediate screens) but can't find anything that works consistently.
The funny thing is that this problem is not addressed in Rockwell's white paper 1763-WP001 on the subject. The examples they provide that use data entry screens do not work the way they are written because of this problem. Either the author didn't test his logic, or I'm missing something. (I'm using a Series A PLC.)
The funny thing is that this problem is not addressed in Rockwell's white paper 1763-WP001 on the subject. The examples they provide that use data entry screens do not work the way they are written because of this problem. Either the author didn't test his logic, or I'm missing something. (I'm using a Series A PLC.)