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how S7-1200 CM1241 Card communicate with Hyper terminal by sending & receiving characters
Created by: Tzole1974 at: 3/3/2010 7:30 PM (3 Replies)
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| 3/3/2010 7:30 PM | |
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Posts: 13 Rating:
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Hello nickephx, It is very interested that SIEMENS develop a library for MD720-3 in conjuction with S7-1200. Thank you for sharing with all of us this info!! Meanwhile, i am trying to use PtP_Send & Receive to communicate with another GSM modem and send SMS. I have attached a very simple program which i use to understand how S7-1200 CM1241 Card communicate with Hyper terminal by sending & receiving characters. My problem is the following : I have defined as a message end condition a timeout of 2000 mSecs. I have started to type chars in the Hyper terminal and i noticed in the Buffer area of the PtP_Receive command which is a string type field in it's corresponding data block (DB1-->MSG_2, you can see it in attached program) that every time, the first two chars were not received in the MSG_2 field. For example : I have entered "Hello" and i received "llo". The "Length" field has counted right the sum of chars, in the above example (5) but the problem exists. Can you please propose something ? Thank you very much in advance Regards, Tzole AttachmentSMS_ALSOS.zip (186 Downloads) |
Last edited by: O_Moderator at: 3/9/2010 7:55 AMnew subject after splitting from /tf/WW/en/Posts/39493#top |
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| 3/4/2010 3:01 PM | |
Joined: 5/28/2008 Last visit: 10/23/2024 Posts: 1343 Rating:
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I think you mean same problem like here: https://www.automation.siemens.com/tf/WW/en/Posts/40617#top There I posted the possible solution I think it is.. regards |
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