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TCP/IP communicaion problem

Created by: Sankar at: 11/23/2018 7:05 AM (8 Replies)

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11/23/2018 7:05 AM	Rate (0)
Sankar Experienced Member Joined: 12/2/2010 Last visit: 4/2/2024 Posts: 61 Rating: (0)	Hi, S7 400 PLC(CP443-1) communicating with three s7 300 PLCs(CPU with PN) using TCP/IP. We are configured all s7 300 PLC as a unknown project. 1. Process01 - Communication ok 2. Raw01 - Communication ok 3.Tai01 - Communication ok if i try to read 52 bytes from s7 300 plc. but i have to read 190 bytes from third party PLC. If i try to read more than 52 bytes i am getting status code: 19 & 4 and getting error 1. anybody have idea to sort out the problem. Thanks in Advance Attachment DEVA.zip (49 Downloads)
	Regards \ Sankar
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11/23/2018 8:04 AM	Rate (0)
javiermorales Bronze Member Joined: 12/13/2011 Last visit: 10/1/2024 Posts: 146 Rating: (6)	Hi, check this page. in principle the links are correct https://support.industry.siemens.com/cs/ww/en/view/26483647
	Last edited by: javiermorales at: 11/23/2018 8:05:40 AM Last edited by: Jen_Moderator at: 11/24/2018 8:16:46 PM Optimized link.
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This contribution was helpful to 1 thankful Users Sankar

11/23/2018 8:41 AM	Rate (0)
Sankar Experienced Member Joined: 12/2/2010 Last visit: 4/2/2024 Posts: 61 Rating: (0)	Hi, The links are correct between s7 400 and all other three s7 300 PLCs.
	Regards \ Sankar
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11/23/2018 8:56 AM	Rate (0)
Duris_I Diamond Expert Joined: 4/28/2015 Last visit: 2/24/2025 Posts: 10832 Rating: (836)	Hello, for first isn't clear to me, is your protocol OUC over TCP/IP or use S7 communication? That posts (question/answer) confused me with this...
	With best regards... Ivan Duris Flight: OMICO
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This contribution was helpful to 1 thankful Users Sankar

11/23/2018 9:08 AM	Rate (0)
javiermorales Bronze Member Joined: 12/13/2011 Last visit: 10/1/2024 Posts: 146 Rating: (6)	Hi. I would try a maximum block of 32 bytes

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11/23/2018 9:09 AM	Rate (0)
Sankar Experienced Member Joined: 12/2/2010 Last visit: 4/2/2024 Posts: 61 Rating: (0)	I have attached the communication detail in Zip folder. we are using s7 connections
	Last edited by: Sankar at: 11/23/2018 9:14:30 AM Regards \ Sankar
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11/23/2018 9:10 AM	Rate (0)
Sankar Experienced Member Joined: 12/2/2010 Last visit: 4/2/2024 Posts: 61 Rating: (0)	Hi, As per the document maximum 400 bytes for s7 400 PLC
	Regards \ Sankar
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11/23/2018 9:15 AM

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javiermorales

Joined: 12/13/2011

Last visit: 10/1/2024

Posts: 146

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(6)

in the consistency of data it asks for 8-32 bytes

Service / Properties	BSEND / BRCV	USEND / URCV	PUT / GET
Max. data length S7-300 / S7-400	32 KB / 64 KB¹⁾	160 bytes / 440 bytes²⁾	160 bytes / 400 bytes²⁾
Possible address ranges S7-300 / S7-400	M, D/M, T, C, I, Q, D	M, D/M, T, C, I, Q, D	M, D/M, T, C, I, Q, D
Data consistency S7-300 / S7-400	Total length per job⁴⁾	Total length per job⁴⁾	8-32 bytes / 32 bytes to total length^3,4)
Communication concept	Client / Client	Client / Client	Client / Server
Max. number of connections	See CPU specification	See CPU specification	See CPU specification
Blocks S7-300 / S7-400	FB/SFB 12 "BSEND" FB/SFB 13 "BRCV"	FB/SFB 8 "USEND" FB/SFB 9 "URCV"	FB/SFB 15 "PUT" FB/SFB 14 "GET"

11/23/2018 9:17 AM	Rate (0)
Duris_I Diamond Expert Joined: 4/28/2015 Last visit: 2/24/2025 Posts: 10832 Rating: (836)	Hello, so you're still in limit so? Sry maybe Kaulquappe can look to that error code, you're use AG blocks? Post zip-ed screenshots how you did cfg. What is that 3-rd party system? Sry if I missunderstand your info, problem is with SEND or RECV from that 3-rd party partner? Update: eeeeeh now I see that ZIP file and this is like Javier stated, S7 communication...
	Last edited by: Duris_I at: 11/23/2018 9:22:57 AM With best regards... Ivan Duris Flight: OMICO
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