The answer to your question is that you need two things: 1. An RS-232 to TTL serial converter; 2. Software.
Quote from: Coding Badly on Oct 15, 2012, 05:55 amThe answer to your question is that you need two things: 1. An RS-232 to TTL serial converter; 2. Software.1. a few dollars on ebay2. read HMI manual. It tells you baud rate and how to talk with it, mostly how to listen to it if there is a custom mode.An HMI is usually connected to a PLC unit to be used as the operator's panel. It will periodically poll or receives values on the PLC registers (most know how to talk to certain brand PLCs) and displays them on the LCD. You may change some of these values on the panel. If your panel has a custom mode where it only sends out values when you press a key, then you can use it on an arduino. Otherwise you have to emulate a PLC. Is that what you want?I spent some fair amount of time trying to find some HMI to work with Arduino but I only bought one and didn't get it to work. So I designed these http://www.inmojo.com/store/liudr-arduino-and-physics-gadgets/item/serial-16x2-lcd-keypad-panel---phi-panel/http://www.inmojo.com/store/liudr-arduino-and-physics-gadgets/item/serial-20x4-lcd-keypad-panel---phi-panel/10 number keys 4 directions and enter/escape
http://www.ebay.com/itm/UNIOP-ERT-16-0045-ERT160045-ERT-16-SCREEN-/290757645139?pt=BI_Control_Systems_PLCs&hash=item43b2819353$1500. Were I in your shoes I'd sell it and use the money to buy a nice tablet computer with a decent processor and enough memory to run a modern operating system.The answer to your question is that you need two things: 1. An RS-232 to TTL serial converter; 2. Software.
After looking through the specs, it looks like its PLC dependant.