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PN Connection between 2 S7400's

Created by: sagsage at: 8/14/2013 2:04 PM (13 Replies)

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8/14/2013 2:04 PM	Rate (0)
sagsage Posts: 9 Rating: (0)	Hi all Sorry if this has been convered before, I've had a good search and couldn't find anything. I've got 2 S7400 CPUs which I need to create a PN connection between. They are in seperate simatic manager projects. One is a 416-3FR05 (only onboard PN port, no CP). The other is a 416-3FS06 with additional CP443-1 card. Connection is to be made to from the first CPU to the CP443-1 in the second project. Physically they are connected via a gateway. Looking at the compendium I can see that the connection is possible, however I'm not sure of (a) what type of connection to configure in netpro and (b) what blocks to use (GET/PUT or similar). For the first project (with no additional CP card) netpro does not allow me to create a connection to an 'other station'. Does this means I have to do it all in the project with the CP card? If so is this possible over PN? Today I have tried to make it work using ICO on TCP sonnection and get/put blocks in the second project with the addition CP card (setting the first PLC as an 'other station'), but had no luck. Thanks in advance.
sagsage Posts: 9 Rating: (0)
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8/19/2013 3:51 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hello, first of all you should decide which communication you want use. 1. PROFINET is a PROTOCOLL which is especially for small data amount and very fast 1 ms. and smaller. This is not a typical communication between two S7-400 Stations. PROFINET can't be routed between to different IP Subnets (different IP Ranges) 2. if you want connect two S7 400 Stations via PN Port (connected to regular Ethernet) then i suggest using the BSEND and BRCV functions. In this case you have to configure an S7 Connection to an UNSPECIFIED Partner (Other Station means non Siemens). How do you program communication blocks FB12 "BSEND" and FB13 "BRCV" for data exchange in the S7 program of an S7-300 CPU?
Rated X Posts: 1547 Rating: (129)
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8/20/2013 3:54 AM	Rate (0)
sagsage Posts: 9 Rating: (0)	Thanks Rated_X! Apologies for not getting my details correct. You are correct in saying that I wish to use the PN ports to create a regular connection. I would prefer to only have to make new netpro configuration in one of the PLC's (the one with the CP card), the other may be hard to find a window to stop. For this reason, I think that I should create an unspecified S7 connection in the PLC with the CP card and use GET/PUT blocks similar to this topic /tf/WW/en/Posts/37404 Do you think this would work over different ip ranges?
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8/20/2013 9:43 AM	Rate (1)
Rated X Posts: 1547 Rating: (129)	Hello, yes this will work. 1. Create a S7-Connection to unspecified partner. 2. Put the IP address of partner station and use for Remote TSAP 03.02 or 03.03 (depends on the used Slot of remote CPU) Important is that you usethe Connection Resource 03.This is a single side connection and the S7 will use a system connection which is already activated by Operating system. If you use a resource with 10 or higher the connection must be configured and downloaded first. IP-Routing with S7 Protocol will be no problem. If you have a firewall between, check if the TCP 102 is released for use and check also that the Router address is set in both PLC!
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8/21/2013 12:09 PM	Rate (0)
sagsage Posts: 9 Rating: (0)	Thankyou rated X Today I have tried this connection with get/put and it appeared to work fine. however (I am new to this), i have realised that the amount of data that i can send with get/put is limited and i need to send more. So today I have made a download to both PLC's netpro so that i can use BSEND/BRECV. I have it setup as follows: PLC1 (with PNCP card) Unspecified connection 'establish active connection' ticked connection resource - local 10, partner 12 BSEND R_ID DW#16#10 BRECV R_ID DW#16#11 PLC2 (onboard PN port) Unspecified connection 'establish active connection' NOT ticked connection resource - local 12, partner 10 BSEND R_ID DW#16#11 BRECV R_ID DW#16#10 When I check online connections in netpro in both PLC's I have a green arrow and 'set up' next to the connection. When I call the BSEND blocks in both PLC's, I get error 3 on both ends (BSEND status). I have BSEND and BRECV blocks configured as per the siemens example in the link you gave me. To me it looks like my R_ID's are setup ok? so how can I get error 3? Thanks again
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8/21/2013 2:30 PM	Rate (0)
sagsage Posts: 9 Rating: (0)	Also worth mentioning - I'm trying to transmit 2000 bytes. I tried reducing this but it made no difference. In PLC1 the connection is 1 (w#16#1). In PLC2 the connection is 3 (w#16#3). Using SFB's in both PLC's. Using 1sec pulse to trigger a send (tried changing to 5sec but this also made no difference).
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8/21/2013 3:17 PM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hi. Unfortunately everything sounds good . First some information: With PUT/GET and S7 300 you can send up to approx. 210Byte (PDU = 240 Byte). With S7 400 you can increase the PDU to 480 Byte and 400 to 450 Byte. About your BSEND/BRCV: The connection is established. So the problem must be by programming the blocks. SFB is correct. BRCV should be called all the time in OB1. BSend should be triggered and then it should be check if the job is finished. A send job takes longer than a OB1 cycle and can take longer than any cyclic triggered job. Check the Done Flag at BSEND to start new joband maybe the NDR Flag at receive. A detailed description about BSEND/BRCV you will find in the Manual System- and Standard functions for S7 300 / S7 400 Chapter 22.6.
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8/21/2013 3:21 PM	Rate (0)
sagsage Posts: 9 Rating: (0)	ah, maybe this is the problem - I am not calling it in OB1. Could this cause error 3?
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8/23/2013 9:57 AM	Rate (0)
Rated X Posts: 1547 Rating: (129)	Hi, for Brcv it is a possible reason. Because ifa send is triggered and the last resource was used before the BRCV is called, then the interface will send this response. For Bsend is it ok to call it in a time OB etc.
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8/26/2013 2:41 AM	Rate (0)
sagsage Posts: 9 Rating: (0)	Thanks Rated X When I moved th blocks to OB1 it did not fix the problem. How would I know if the last resource has been used?
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