Internet PLC Forum

Is it possible, through some undocumented command/procedure to clear the serial buffer and/or test the buffer for content, prior to issuing the INPUT$ command ?
     It has been my experience that until an INPUT$ command is issued,it is possible for multiple <CR> terminated strings to reside in the buffer. I have a program where I am trying to read a string at a specific instance in the program, if I were to make multiple scans prior to reading the contents, then I am reading the first scan to enter the buffer, the next command reads the next string and so on.
Any help would be greatly appreciated

Is it possible to append a <LF> AFTER the default <CR> character, while using the PRINT command?
I am trying to send commands to an RS-485 device which requires this protocol     "command character",<CR>,<LF>

Zebra manufactures their XiIII series printers with a serial port,with the purchase of an additional adapter (which is available through them) you can convert to 485 which is addressable,allowing you to create a multidrop-link network with all your printers and feasibly use only one PLC.
 
www.zebra.com

I have several TMD+1616 PLC's on which I am using the 4 x 20 LCD displays (purchased through TRI-PLC). all are wired according to specs in regards to the current limiting resistor and using the supplied interface cable.
  My problem is this,all of these units will periodically have diplay problems which usually consist of a complete black (blocked out) screen or a blank diplay altogether.  If On-line monitoring is done then the PC display is correct and the PLC always performs it's tasks even in this condition. A master reset function or a reset from on-line monitoring will not clear the display,the unit must be powered down. this usually occurs at least every other day on all PLC displays.  
   Any thoughts or suggestions?