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i am having trouble with the Tsend and Trec

1/8/2013 5:36 PM	Rate (0)
Oymyakon Member Joined: 8/2/2012 Last visit: 1/24/2024 Posts: 2 Rating: (0)	Hi, i am having trouble with the Tsend and Trec. The Tsend keeps adding characters to the string i am trying to send. I am checking this in wireshark and hyperterminal. why could this be? I am trying to send for example "password$R$L" and the tsend adds an extra character at the begining. Cheers Paul.
	Last edited by: O_Moderator at: 1/9/2013 10:14 AM new subject after splitting from /tf/WW/en/Posts/83687#top
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1/9/2013 12:07 PM	Rate (0)
Kaulquappe Posts: 3093 Rating: (324)	Hello Paul, each string starts with a length information. So you should set the pointer of TSEND on the first data byte, not on the length information. Regards, Kaulquappe
Kaulquappe Posts: 3093 Rating: (324)
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1/9/2013 1:08 PM	Rate (0)
Marko Bursic Platinum Member Joined: 9/8/2009 Last visit: 7/17/2023 Posts: 1410 Rating: (154)	Give a screenshoot of wireshark, maybe its a part of TCP/IP protocol that you see, wireshark should be able to decode it and give the explanation for that. Also Kaulquappehas a good exlanation, strings in simatic have a format in front - two bytes. If you put to TSEND a pointer to string, then TSEND will understand this like a array of bytes. You can use AT statement in declaration. Passw: struct format[0..1] of byte text[0..18] of byte end_struct; Password AT Passw: String[20]; you pass to TSEND Passw.text pointer.
	Last edited by: Marko Bursic at: 1/9/2013 1:24 PM Last edited by: Marko Bursic at: 1/9/2013 1:18 PM
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