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SIMATIC S7-1200

s7-1200 - wifi - wincc flexible

Thread Starter: rusli_rusli   Started: 3/2/2011 4:54 PM   Replies: 4

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  3/2/2011, 4:54 PM
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dear forum,

is this configuration possible :

2 unit plc s7-1200 ( wifi client ) connected via wireless to 1 unit plc s71200 ( collecting plc ) later this collecting plc will connect to wincc flexible runtime..

see attachment

br
rusli

Attachment: configuration.JPG  (223 Downloads)

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  3/2/2011, 5:55 PM
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rusli saja wrote:
dear forum,

is this configuration possible :

2 unit plc s7-1200 ( wifi client ) connected via wireless to 1 unit plc s71200 ( collecting plc ) later this collecting plc will connect to wincc flexible runtime..

see attachment

br
rusli

The image shows 3 S7-1200's and 1 WinCC Flex Runtime (running on a PC?).  The wifi-client devices would be wifi bridges since the S7-1200's only connect via wired network, so you would need a bridge device between the AP and each of the 2 S7-1200 PLCs.

The wincc flex runtime can connect to one device at a time so having it communicate with just the 1 PLC is a very good thing.

The software necessary to communicate between S7-1200 PLCs is available.  However, if you are using a PC to run the wincc flex runtime, you may as well use OPC or modbus/tcp to collect data from the 2 wireless S7-1200's directly.  You will have potential problems with power outage and data loss with the S7-1200's if logic and tags are not properly configured.

Hope this helps a little.

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  3/3/2011, 9:59 AM
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Hi,

I don't see any problems with this configuration. S7-1200 at WiFi AP collects all the data and is directly wired with a PC-Runtime via Ethernet. All what you monitor at the PC-Runtime is from the collecting PLC.

So, in my opionen, the collecting PLC is responsible to get all the data and check, if communication is okay and no data were lost. It's normal TCP/IP commuication. It also depends at the Wifi devices, how stable the connection is. With the Siemens intelligent devices Scalance W784-1 (AP) and W744-1 (Client) it shouldn't be a problem.

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  3/3/2011, 1:41 PM
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dear forum,

yes i intended to use scalance wifi with this configuration.. except for the wincc flexible i use non siemens ethernet card..

thx for your info..

br
rusli
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  4/6/2011, 3:36 PM
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Dear Rusli,

Be aware that the W744-1 (PRO) Client can only connect to one device (at the wired side).
If you need more devices then take the W746-1 (PRO).


Productspecialist Industrial Automation
Onexis/Rexel / Hagemeyer Netherlands
Specialism: Simatic
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