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FB12 BSEND ERROR CODE 2

11/28/2013 8:54 PM	Rate (0)
Mary_Vit Posts: 5 Rating: (0)	Hi all! I have communication between two PLCs and I'm using commands BSEND and BRCV. I have an error in BSEND, STATUS=2which means "Negative acknowledgement from the partner SFB/FB. The function cannot be executed." What does it means? In BRCV side, there is no done, neither error. In the "other direction" there is no problem. I can comunicate without problem. I have restart the PLC but nothing. Thank you in advance!
Mary_Vit Posts: 5 Rating: (0)
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11/29/2013 10:12 AM	Rate (0)
Owei Gold Member Joined: 10/1/2013 Last visit: 3/21/2025 Posts: 605 Rating: (71)	Hi, to help we need more information. How is your parametrization of your blocks (BSEND AND BRCV)? And how did you setup your S7-Connection? What kinds of hardware are you using? regards!

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11/29/2013 7:00 PM	Rate (0)
Mary_Vit Posts: 5 Rating: (0)	Solved! I had to restart the PLC butswitching the power off. I was communicating severalIM151-8 PN/DPCPU to a 3172PN/DPPLC by S7 connection. In PLC 3172PN/DP I have a FB wihch calls FB12 several times, each with its correspondinginstance data block. In one of them I made a mistake and called the same instance data block in two FB12. I realized this and changed it, but then I couldn'trestart the other communications. I only saw an error in all of theIM151-8 PN/DP with Status 2, but the problem was in PLC317 2PN/DP. I restarted the PLC3172PN/DPswitching to Stop mode, but it doesn't work, I had to switch the power off. For those who want to use BSEND and BRCV I advice to read this FAQ before, it was very useful for me! How do you program communication blocks FB12 "BSEND" and FB13 "BRCV" for data exchange in the S7 program of an S7-300 CPU? Thank you very much anyway Owie!
Mary_Vit Posts: 5 Rating: (0)
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12/2/2013 10:59 AM	Rate (0)
Owei Gold Member Joined: 10/1/2013 Last visit: 3/21/2025 Posts: 605 Rating: (71)	I'm glad you solved your problem. For the lazies around here: This is the link to the mentioned FAQ.

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9/29/2020 5:51 AM	Rate (0)
Balaji R Regular Member Joined: 7/20/2015 Last visit: 6/9/2023 Posts: 9 Rating: (0)	Hi, URL is not working Regards Balaji R

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9/29/2020 8:03 AM	Rate (0)
Kirschiaub08 Gold Member Joined: 4/25/2017 Last visit: 3/20/2025 Posts: 436 Rating: (69)	It is still working: https://support.industry.siemens.com/cs/ww/en/view/18516182
	Best Regards, Kirschiaub08 Please rate my answers if it was helpful 😊
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