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Conversion: S5-95U SI2 with PtP connection -> S7400

Created by: Patrick_Sthlm at: 5/18/2010 12:56 PM (4 Replies)

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5/18/2010 12:56 PM	Rate (0)
Patrick_Sthlm Posts: 21 Rating: (0)	Dear Sir/Madam, I have an existing S5-95U, equipped with a SI2 "second serial interface". The communication on this port is PTP (as described in manual https://support.automation.siemens.com/WW/llisapi.dll?query=second+serial+interface&func=cslib.cssearch&content=adsearch%2Fadsearch.aspx&lang=en&siteid=cseus&objaction=cssearch&searchinprim=0&nodeid0=4000024 section 2) I have come to the conclusion that this is the communication-methodsince the described FB100 "P-Z-P" is used in the program. (I attach a pic of DB1) To my question: Is it even possible to make a S5->S7 conversion of this communication? Can the program be made to work with a CP441 Point-to-Point? Best regards, Patrick Attachment DB1.JPG (78 Downloads)
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5/18/2010 3:55 PM

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dchartier

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Hello Patrick;
The CP 441 (either -1 or -2) is designed for PtP communications, with add-on interfaces for RS-232, RS-422/485 or TTY. here is part of the description of the modules as shown in the A&D Mall:
https://mall.automation.siemens.com/GB/guest/index.asp?aktPrim=0&nodeID=5000093&mlfb=6ES7441%2D1AA04%2D0AE0&aktTab=4&lang=en (look at the Description tab)

· For powerful, high-speed serial communication via point-to-point connections

· 2 versions:
o CP441-1 with 1variable interface for simple point-to-point connection
o CP 441-2 with 2variable interfaces for powerful point-to-point connection
· Plug-in interface modules for different transmission interfaces: RS 232C (V.24) , 20 mA (TTY) or RS 422/RS 485 (X.27)
· Implemented protocols: ASCII, 3964(R), printer drivers; CP 441-2 additionally has RK 512 and customized protocols (retrofittable)
· Simple parameterization via a parameterization tool integrated into STEP7

You can alsoinstall different serial protocols in the CP 441-2, such as Modbus master or slave, A-B DF1, and others.

However, the S5-95U is a very small CPU, and I am wondering if a S7-400 is an overkill in this situation, if you are planning a one-to-one conversion.
You could look at the compact CPUs of the S7-300 family, some of these CPUs come with a PtP port and dedicated communication functions, along with integrated I/Os and technological functions: the S7-313C-2 PtP and the S7-314C-2 PtP, with a RS-422/485 port and ASCII, 3964R and RK512 protocols inbuilt, which should be very close to the configuration of your S5-95U.

6ES7313-6BF03-0AB0

SIMATIC S7-300, CPU 313C-2 PTP COMPACT CPU WITH MPI, 16 DI/16 DO, 3 FAST COUNTERS (30 KHZ), INTEGRATED INTERFACE RS485, INTEGRATED 24V DC POWER SUPPLY, 64 KBYTE WORKING MEMORY, FRONT CONNECTOR (1 X 40PIN) AND MICRO MEMORY CARD REQUIRED

6ES7314-6BG03-0AB0

SIMATIC S7-300, CPU 314C-2 PTP COMPACT CPU WITH MPI, 24 DI/16 DO, 4AI, 2AO, 1 PT100, 4 FAST COUNTERS (60 KHZ), INTEGRATED INTERFACE RS485, INTEGRATED 24V DC POWER SUPPLY, 96 KBYTE WORKING MEMORY, FRONT CONNECTOR (2 X 40PIN) AND MICRO MEMORY CARD REQUIRED

Use the links above to find more information on these CPUsin the Description tab.

Hope this helps,
Daniel Chartier

Last edited by: dchartier at: 5/18/2010 4:05 PM

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fritz

5/19/2010 9:01 AM	Rate (0)
Patrick_Sthlm Posts: 21 Rating: (0)	Thank you for your reply dchartier, First, the program from the S5-95U is only a small part of what is going to be handled by the S7400, and I agree that otherwise it would be overkill . Second, my consern in this question is regarding the actual port used on S5-95U, the SI2, which in this caseuses point-to-point link with Sinec L1 protocol. I believe I have read somewhere that anything to do with Sinec L1 have no counterpart/compability-possibility when converted to S7. Is this so? And that you have to start from scratch rather than convert.
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5/19/2010 10:18 AM	Rate (0)
fritz Diamond Expert Joined: 10/7/2005 Last visit: 6/6/2023 Posts: 2966 Rating: (1025)	Patrick_Sthlm Second, my concern in this question is regarding the actual port used on S5-95U, the SI2, which in this caseuses point-to-point link with Sinec L1 protocol. Hello Patrick_Sthlm what makes you think that it is a SINEC L1 link (I can not find any "SL1" entry in your DB1)? As far a I can see,SI2 is configured for 3964(R) protocol in DB1(see "RKT" entry in DB1 and chapter 3 of THIS manual), which is supported by S7 serial cards (SINEC L1 is however not as you already know). Question: What's connected to the other end of the serial link? I hope this helps
	Cheers fritz The advice and opinion given in this thread is that of the author and does not necessarily reflect the views of I S Systems Pty Limited. To find out how I S Systems can help you with your automation needs please visit www.issystems.com.au.
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5/19/2010 1:04 PM	Rate (0)
Patrick_Sthlm Posts: 21 Rating: (0)	Thank you fritz, for your reply, I believe you are right, this is 3964(R) by the look of the DB1 parameters. fritz Question: What's connected to the other end of the serial link? It is a modem. EDIT: The reason I believed the communication was PtP was the the original programmer called the commnication-FB for "P-Z-P" FB100, like it's called in the manual mentioned above, section Point-to-point. But now it's more clear that this is 3964(R). This should mean that I can fairly eazy implement the existing program into the S7-400? Regards /Patrick
Patrick_Sthlm Posts: 21 Rating: (0)	Last edited by: Patrick_Sthlm at: 5/19/2010 1:38 PM Last edited by: Patrick_Sthlm at: 5/19/2010 1:05 PM
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Created by: Patrick_Sthlm at: 5/18/2010 12:56 PM (4 Replies)

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