S7-200 PLC PPI cable

johneedw · Jun 27, 2021

Dears,
I need the configuration of the PPI cable suitable to connect RS232 PC side to RS 485 PLC(S7-200) side to download a project via MicroWIN software.
I found a circuit diagram for such connection but I'm in suspicious for this circuit attached below which might cause a damage!..
Waiting for kind help !...

sigmadelta · Jun 27, 2021

Well, there are many suppliers of the USB-PPI cable... the part# of the official Siemens cable is:

6ES7901-3DB30-0XA0

But you can find it also on AliExpress (lower prices):

https://www.aliexpress.com/w/wholesale-cable-ppi.html

The important thing is that it is a USB/PPI cable.... do you need a serial PPI cable for some specific reason?

johneedw · Jun 28, 2021

Thank you dear sigmadelta,
In fact I need serial PPI cable because I've an old desktop computer fully installed with a licensed Sematic softwares and its USB is broken !..
Please, what is your point of view about the attached circuit diagram ?
Thank you again

sigmadelta · Jun 28, 2021

Well for the serial cable, that part number is 6ES7901-3CB30-0XA0, but was discontinued by Siemens.

Another resource is AliExpress for the serial PPI cable:
https://www.aliexpress.com/w/wholesale-rs232-ppi.html

I can't comment on that cable diagram because I have no way to build or test it.

johneedw · Jul 12, 2021

Dear Sigmadelta,
I've bought a USB-PPI cable for S7-200 PLC but the problem still the same! no communication between PC and PLC !..
The attached images showing the connection and the communication problem !..
Help me PLZ !..
Thank you very much.

Roju · Jul 12, 2021

Have you done everything to set up PG/PC comm?

There is quick video how to do it here :

https://www.youtube.com/watch?v=Ud6CfBzye8E

sigmadelta · Jul 12, 2021

From that video, if they are emulating the serial/PPI, then select its COM Port. If they are emulating the Siemens USB/PPI cable, then select USB.

geniusintraining · Jul 12, 2021

johneedw said:
Dear Sigmadelta,
I've bought a USB-PPI cable for S7-200 PLC but the problem still the same! no communication between PC and PLC !..
The attached images showing the connection and the communication problem !..
Help me PLZ !..
Thank you very much.

Cant comment on ASAutomations products as they are my competition... but you are trying to use ProfiBus from your first picture and that will never work, watch the video that Roju posted, thats mine and it should work for a standard USB... do NOT select USB if the cable shows a COM port number, if it shows up under Simatic device then you can use USB, post a screen shot of your device manager then we should be able to help.

johneedw · Jul 13, 2021

Thank you for kind help dear friends,
But I've did every thing to set PG/PC comm according to the video you
shared, while the problem remains the same!. No communication !..
Notes:
1- The attached images are showing all setting and the communication failure.
2- I'm using windowsXP since the version I have of Micro/Win software is old.
Waiting for kind help !..
Many thanks

geniusintraining · Jul 13, 2021

I dont know about their cable but to me it looks like you have a standard cable NOT a MultiMaster... the MultiMaster cable should show up as a device not a COMX (yours COM3), see the attached two PDF's for the two PPI cables I sell, the setup should be the same even if you are using their cable and not mine.

Have you contacted them about the issues you are having?

johneedw · Jul 14, 2021

Dear Mr.geniusintraining,
Thank you for kind advice,
I understand, since I've a standared PPI cable, I should use (COM1) instead of (COM3) assignment ?..
Also, the standared file say that the MPI cable can be used for S7-200 series too !..
Now I've MPI cable, but I do not know how to use it with S7-200 PLC !..

geniusintraining · Jul 14, 2021

No COM1 is reserved for only a real serial port and will not work with 99% of USB settings so COM3 is what you want to use

Most MPI cables supported PPI (485) so if you have a MPI cable its worth a try... when I wrote that procedure there were only a couple MPI cables and we were the only aftermarket, now there are many and they all have different features so if your cable will work? not sure but its easy to try

We sell a Profibus/MPI/PPI cable but the PPI is limited and I always tell my customers to buy the Multi Master cable its a lot easier to use and is auto sensing

You will use your MPI cable with your 200 CPU the same way you use the PPI cable

JENGMOD · Jul 14, 2021

I encountered the same problem, self-made cable. I ordered PPI from Lazada, it will arrive soon.

johneedw · Jul 18, 2021

Hello Friends,
I'd like to hear from you about this Simatic Field PG with its MPI cable shown in the images attached. Is that suitable to be used with my S7-200 PLC please?..

geniusintraining · Jul 18, 2021

I dont think so... it only has MPI and DP listed, but I also dont think it will hurt anything to try, do you have MicroWin loaded on the Simatic Field PG?

S7-200 PLC PPI cable

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