fx1s comm problem rs intruction

[ace21122112 0]

Me again Anyone know why when run this program I am transmitting 7F 00 instead of FF 00 FF 00 rstest.zip

[JRoss 84]

Not sure why you're getting exactly what you're getting, but here's a couple of pointers. First, in Mitsubishi world a hex 00 is considered a null character, and generally acts as the end of a character string for ASCII instructions. The RS command deals with it differently. I thought it would ignore it, but you might try changing it to hex 01 just to test. It's possible that is messing things up. Second, the RS command sends a specific number of characters, not registers. So your "K2" is only sending two ASCII characters, or one register. Depending on how it's dealing with the null character, of course. EDIT: Ok, now I see it. In the PLC parameters, you have your data length set for 7 bit. That can only go up to hex 7F (i.e. binary 111 1111). You'll need to switch to 8 bit if you want to send hex FF. Edited 18 Mar 2013 by JRoss

[ace21122112 0]

Ok got it working thanks