ascii programming

Hi All,

Wanna know your suggestions and solutions to my problem!!

Actually i have 10 micrologix-1400 plc which should communicate with 10 serial modems in site with ASCII protocol.

So i've configured rslinx for both ethernet and rs232 devices . And rslogix 500 as channel 0-ASCII and channel 1-DH485

So now am able to communicate with rs232(ascii) and upload and download a program using ethernet.

But what i want to know is how can i program rslogix500 for this ascii protocol?is there any specific instruction set for that?how can i program ascii ?

I've read somewhere that we can program it using hyperterminal..is it so?if so pls can anybody help out soon?!

Do i do anything in rslogix500? or hyperterminal? or anything else?

Pls help me out i dont have any idea about ascii protocol and communication..and its urgent

Thanks in advance..!!

As far as I know, you can't use RSLogix with the ASCII protocol.

And as far as i know all Allen Bradley plc's do support ascii protocol...micrologix1400 definitely supports ASCII protocol that's for sure.

all i want to know is how is the programming done with ASCII and do i need to change any settings in rslogix or rslinx to communicate with ASCII protocol.

Yes, you can use ASCII to talk to ascii devices serially, including your modem. RSLogix 500 is not an ascii device.

ASCII is not a communication protocol. It only determines the coding of the individual bytes. While there are control characters they are rarely used in a consistent manner. Typically an ASCII message is a series of printable characters. Many formats terminate a message with a carriage return which is decimal 13 or hex 0D. But this sequencing is set by each individual type of unit.