hi,

Please have a try and read S7-help of the S_SEND and S_RCV.

If the characters you want to send are not correct, and you have to have two characters to much before "01fw", do like Duris told you and declare it as Array of Char.

I guess 01fw is a command, that you get something, that you want to recieve with S_RCV, rigth?

If the command is sent right, and the Rx-LED doesn´t light up, you don´t get something to recieve.

If the Rx-LED lights up and you don´t get something back from S_RCV-block, you need to interpret the error-bit and status-word. The Status-Word tells you whats wrong when the Error-bit is true. So when the Errorbit is true, copy the status-word to a free MW to read the information. You will find the diagnosic-information in the manual of the module.

SIMATIC ET 200S Serial interface modules

hope this helps,

regards,

Yes,

simply we must know what you're doing this time, sending from Hyperterminal to PLC, or from PLC to Hyperterminal or what else so? Simply with hyperterminal you must also look how to interpret ESC chars with correct value, sometimes you can't simply use ALT+<code>, better can be use hex editor with some file, I don't work with it but think as I said, sometimes you need send/check chars that aren't represent simply by char.

hi

why this 1SI sent to the STX01ETX is it standard

thanks & regards

Adi

Hello,

very sry, don't understand your info, simply again, your posted frame is in Simatic (hex) this:

16#02

16#30

16#31

16#03

That STX, ETX symbols are special characters represented in hex format like I posted here - 02 and 03. Can you pls send right infos what I recommend again and again? Attach Picture from documentation what right frame you need sent to device, also what you now want send from/to?

hi

now rx & tx LED blinking

NDR Flag is Flashing

when i connect third party device to hyperterminal it show value like -20013.12

But third party device connect to 1 SI ascii Module it shw some garbage value like character 'a' like that

its on RS232 communication

Thanks & Regards

Adi

Hello,

sry my friend but work with you is really run for longest distances. If you now have reply from Device (that mentioned frame 02 30 31 03 to be needed send), you must have receive buffer big enough for all needed data to be received correctly. Internal structure about received frame from that Device I don't know, again, look to documantation, also read carefully all posts again. Did you have same communication settings on both sides, your PLC and External Device? Can you post what type of buffer you're using, String or ARRAY of <type>?

hi

i send 01fw? in DB 42 Array of character

i send you file which i receive in DB43 array of character

Thanks & regards

adi

Hello,

sry my friend, what you can say to me, if I again and again ask you for info about needed frame consistency and you didn't answer? You still giving here some unefective questions, can you give one right answer about frames structure from manual, or simply attach communication manual where we can look to right format of frames. Also your pdf is ok, but how we can know what you do with intructions, how you manage communication, how you can be sure that you receive every new frame on right offset (hope same after every receive)? Very sry...