Skip to Content

SiePortal

The integrated platform for your product selection, buying and support workflow - bringing together Industry Mall and Online Support.

SiePortalDeutsch

Search

Home
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menu temporary not available
- Menue temporary not available
- {{item.title}}

Products & Services
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Support Support
{{(apiData.Support | filter:{'rank':1}:true)[0].title}} Support
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
MySiePortal MySiePortal
{{(apiData.MySiePortal | filter:{'rank':1}:true)[0].title}} MySiePortal
- Menu temporary not available
- Menue temporary not available
- {{item.title}}
Cart ({{apiData.CartCount}})

Navigation

General modbus information. How hard can it be ?

Created by: www.opauto.no at: 8/22/2014 10:00 PM (8 Replies)

Rating (0)

Thanks 4

9 Entries

8/22/2014 10:00 PM	Rate (0)
www.opauto.no Posts: 32 Rating: (0)	Hi im having a S73142/DP with a CP 343-1 lean which i want to talk to my Scada system via modbus. My Scada supports modbus tcp. Im trying to find some documents which helps me start the configuration. I want to read some dbs via modbus thats all. Does anybody have a simple guide for how to do this ? Im ending up with 1000's docs reading and reading causing even more questions now, and no progress. An simple example would be fantastic!
www.opauto.no Posts: 32 Rating: (0)
Suggestion To thank Quote Answer

8/23/2014 12:50 AM	Rate (0)
dchartier Grandmaster Joined: 9/27/2006 Last visit: 11/9/2024 Posts: 12293 Rating: (2691)	hello opauto; Modbus/TCP on a CP 343-1 requires some specialized function blocks (to be eventually purchased) thta are grouped under the designation "Open Moidbus TCP" by Siemens Industry division. Look at the introductory information from this FAQ: How do you establish OPEN MODBUS / TCP communication from a SIMATIC S7 and where can you find further information? Then follow the link to S7 Open Modbus TCP where you can find downloads of the different blocks (you would need the Modbus TCP CP library (2XV9450-1MB00)) and sample programs and documentation for each. The downloads are fully functionnal for testing purposes, but they generate a message "missing licenses" in the diagnostic buffer continuously, and causethe diagnostic LEDs to light up, which clients do not like to see.. Hope this helps, Daniel Chartier

Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users Navnag

8/23/2014 8:35 AM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	Hello opauto dchartierhas put you onto exactly the right track. In the Link provided by him, you will also find further links to the following pages : Wizard for creating connection data for Modbus TCP communication. (Modbus TCP Wizard ) This Wizard greatly simplifies setting up the MODBUS TCP Configuration in the S7 CPU. It creates and parameterises all the Configuration DBs in a User friendly manner. Sample Program - Communication between SIMATIC S7 and Modicon M340 via Modbus TCP SInce you are going to connect your SCADA to the S7 CPU on MODBUS TCP/IP, normally the CPU will be configured as a MODBUS TCP/IP Server while the SCADA would be configured as a Client. Hope this helps Cheers Navnag
	There is no such thing as the last bug in a program There are no stubborn bugs, There are only stubborn Debuggers.
Suggestion To thank Quote Answer

8/24/2014 11:09 PM	Rate (0)
www.opauto.no Posts: 32 Rating: (0)	Thanks for all the answers! Well i can clearly see there is a lot to readthru about modbus. Have any of you guys made a modbus connection in CFC ? How long time should i calculate before getting the modbus up and running. As a sidenote to this discussion, it's very hard to find a good step by step manual for setting up a modbus communication. This is my experience so far: im bouncing between documents and referance ending up no where. It's very frustrating!!!!!
www.opauto.no Posts: 32 Rating: (0)
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users Navnag

8/25/2014 7:12 AM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	www.opauto.no Thanks for all the answers! Well i can clearly see there is a lot to readthru about modbus. Have any of you guys made a modbus connection in CFC ? How long time should i calculate before getting the modbus up and running. As a sidenote to this discussion, it's very hard to find a good step by step manual for setting up a modbus communication. This is my experience so far: im bouncing between documents and referance ending up no where. It's very frustrating!!!!! How much time ... depends upon how familiar are you with Modbus TCP and S7 Programming. Using the Modbus TCP Wizard, personally I had the connection Up & Running in 1 day. ( If you ignore the 1-2 days required to get the activation code from Germany ). A Sample project is included in the CD that you receive when you order the software. ( Description of the sample project is there in ch-8 of the Manual ( Copy attached ). Normally a good point to start is to use the sample project and run the Wizard to adjust your parameter settings. It is not as complicated as it seems to be. Hope this helps Cheers Navnag Attachment Modbus TCP PN_CPU English.pdf (270 Downloads)
	There is no such thing as the last bug in a program There are no stubborn bugs, There are only stubborn Debuggers.
Suggestion To thank Quote Answer

8/25/2014 3:41 PM	Rate (0)
Sakura Silver Member Joined: 9/22/2010 Last visit: 7/25/2024 Posts: 225 Rating: (28)	Hello, the manual that Navnag attached is for an older version (V2.4)of the library. When using the actual version V2.6, you can find an example project for CFC as well. If you use the CFC example and the Modbus TCP Wizard for the configuration, it should not be too difficult to get the Modbus/TCP communication running. Regards, Sakura

Suggestion To thank Quote Answer
This contribution was helpful to 2 thankful Users dchartier Navnag

8/25/2014 11:24 PM	Rate (0)
www.opauto.no Posts: 32 Rating: (0)	Ok thanks! I guess its a stupid question. Will the Modbus work without the licence ? (even in CFC) Do someone have the number for it ? can the LIcence be used in several project ? RGDS ØP
www.opauto.no Posts: 32 Rating: (0)
Suggestion To thank Quote Answer

8/26/2014 6:50 AM	Rate (0)
Navnag Platinum Member Joined: 11/21/2007 Last visit: 9/25/2024 Posts: 2325 Rating: (308)	www.opauto.no Ok thanks! I guess its a stupid question. Will the Modbus work without the licence ? (even in CFC) Do someone have the number for it ? can the LIcence be used in several project ? RGDS ØP As has dchartieralready mentioned in a previous post : "The downloads are fully functionnal for testing purposes, but they generate a message "missing licenses" in the diagnostic buffer continuously, and causethe diagnostic LEDs to light up, which clients do not like to see.." The number ( Activation Code ) is specific to each CPU for which the software has to be used. This is provided by the MODBUS TCP Support, once you provide them your license details and an identification no generated by the software block once it is loaded in the CPU. One license can be used only in one CPU for which the activation code has been received. Hope this helps Cheers Navnag
	There is no such thing as the last bug in a program There are no stubborn bugs, There are only stubborn Debuggers.
Suggestion To thank Quote Answer

8/26/2014 9:57 AM	Rate (0)
www.opauto.no Posts: 32 Rating: (0)	OK thanks! The licence was quite a penny. OK thanks! RGDS ØP
www.opauto.no Posts: 32 Rating: (0)
Suggestion To thank Quote Answer

|

Share this page:

Share this page on...

Related topics by keywords:

ModbusTCP

Follow us on