Siemens S7-1500 PLC JSON RPC Web API - Integrating Control Systems to Higher Level Systems with HTTP

[@choppacast]

Super straightforward That's what I was looking for Thanks a bunch

[@hamedmoradi8737]

i have created a web based HMI via the Webserver custom pages but this is way much more better & faster and easier way for the ordinary user to monitor the variables. thanks for sharing this video.

[@hennero.3826]

That seems to be exactly what I was looking for! I am not a PLC expert, instead, I am woking in an IT department using Oracle databases and we implemented an MES system a few years ago using OPC to retrieve data from the PLCs. To do this, we attached a small OPC server with each PLC and connected the MES software via OPC protocol to these OPC servers. Now, with what I just learned from your video, it seems like these built-in features of the S7 1500 make OPC servers obsolete if I have the means to do JSON requests from the database side (which Oracle can do via PL/SQL, of course). Am I getting this right that connecting directly to the PLCs web server/service and using JSON requests can be used instead of OPC and basically can do the same job?

[@mohamadismailbasha6083]

Thanks a lot for the effort put on this video.

[@JahKozmyk]

Hi, I'd love to know which HTML5 objects you used for the graphing HTML pages. I am familiar to the PLC side, a bit more info on the HTML/Javascript side would be fanatastic!

[@naumanali8357]

Nice initiative I love this technology I am a Full Stack javascript developer and passionate to learn how to connect the plc to decentralized apps. please share some more resources regarding this

[@talbizakaria6044]

Please if worked or still working on this project contact me.

[@ledamns]

I'm just entering the world of JSON and PLC and I have a question. What would be the process to read the data from the WED to the PLC and with it generate other values and thus send them again? What type of variables would they be stored in the PLC? Sorry if it's an obvious question. Thanks for the video

[@gajarubanjeyakumar7226]

Do u mind sharing the sourcecode?

[@HzHzhKrm]

What max data rate may be achived in this system?

[@JuanAlvarez-oq4ny]

Is it possible to take data but from the HMI, I have a TP1900 confort and I would like to send a request to get data from a USB in the HMI. Thanks in advance!!

[@leominlat]

Hi , how about S7 controller is client , can access and exchange the tags with any web server ?

[@SarelJansevanRensburg-de9hx]

Hi, I followed the exact same steps to get a token from a S7-1500 PLC using Postman. When the PUT request is sent, I get a response from Postman Status "405 Method Not Allowed". Not able to get the token and send requests to the PLC from Postman. Please assist?

[@Max-dc6if]

Is it possible that you share the html files that have been deployed to the plc? I'd love to make a WebApp out of it and deploy that one in run as another example of what can be done with the s7-1500 Web API - of course only if that'd be fine for you.

[@vipinmanikkara]

hi, did you rcv the source code ?

[@Max-dc6if]

@@vipinmanikkara Nothing so far.

[@juangonzalezsimoes1305]

Great video! Very interesting I am working on a project to make a POST on a REST API server with JSON from a Siemens PLC. Is this possible with an S7-1500 PLC? Thanks for the video

[@AutomationStation]

Have you seen the LHttp library? It has a POST block ready to use. support.industry.siemens.com/cs/document/109763879/

[@ishouldbeonmountrushmore8156]

@@AutomationStation I am always getting a 8089 error. do you know why that is ?

[@talbizakaria6044]

Please if u still working on this project contact me.

[@talbizakaria6044]

Because I'm also in the same situation now.

[@sakkarinvaiprasert9797]

What is a TIA version do you use? And it can work with S7-1200 ?

[@AutomationStation]

EDIT: As of V4.5 Firmware of S7-1200 and TIA Portal V17 this feature is also functional in S7-1200

[@christianpfoertsch]

With V17, also S7-1200 supports this feature 😀

[@olegmalinovskiy982]

Hi, It's looks really nice, can you share please chart page?

[@Persojet]

Is it possible otherway around? Getting data from API to the PLC?

[@AutomationStation]

Sure, there are some http instructions available for GET and Post calls: support.industry.siemens.com/cs/document/109780503/

[@engineeringart8502]

Is it possible to send data from SCADA using JSON?

[@AutomationStation]

What SCADA platform are you working with? If you are using WinCC then using the built in S7 drivers are the best choice.

[@ashiqmumtaz8726]

Can you please share the project files?

[@JuanAlvarez-oq4ny]

Does anyone know if there is a way of making a request for a file within the HMI? I want to graph older data that is stored in a USB in the HMI. Thanks in advance!

[@AutomationStation]

Which panel?

[@JuanAlvarez-oq4ny]

@@AutomationStation It's a TP1900 comfort

[@AutomationStation]

@@JuanAlvarez-oq4ny Don't think you'll have any 'modern' options but Check HMI Option+, I think you could attach a network drive and push data this way. There might be other ways as well though - not a panel expert myself I'm afraid ;) Maybe try checking with Siemens direct

[@JuanAlvarez-oq4ny]

@@AutomationStation Thank you for your answer!!

[@davidschumaker5133]

Thanks for the informative videos. I keep getting a '400 BAD REQUEST' when i try to connect. I have everything set as shown in the video but i never get a response back. I am using a S7-1500 1515-2 PN CPU. I have configured the webserver and added a user with the same name and password that you used. the only thing I'm unsure of is the id number. Any help is appreciated. Thank you.

[@yaroslavlyulko2298]

Aslo "400 BAD REQUEST", any idea? What to check?

[@AutomationStation]

Just to confirm, the PLC you are using has V2.8 firmware, is programmed in TIA V16, and you are connecting via HTTPS?

[@davidschumaker5133]

@@AutomationStation Yes it is firmware 2.8 and I am using TIA Portal V16 Update 4.

[@davidschumaker5133]

@@AutomationStation Yes on HTTPS too.

[@yaroslavlyulko2298]

you need create certificate (CA Certificate and Device certificate) in TIA and connect them to Postman

[@VidyeshKumarJain]

very nice

[@陈85]

hello！I'm using 1200, firmware library 4.5.0. I'm curious why your response is so fast, it's done in milliseconds. however I need a few seconds。if I use lhttp,its fast like yours .Thank you

[@christianpfoertsch]

Hpw ,amy API requests do you send? Are you using JSON-RPC Bulk-Requests to minimize the HTTP and TLS load? S7-1200 though is slower than S7-1500

[@jeesantony5308]

thanku....

[@juritihonov8336]

thank you

[@joga_bonito_aro]

Its not really RPC though to be honest. RPC means remote procedure calls. In other words, it means that you can call functions remotely. You may be able to call predefined functions via a remote PC, but you can't really implement your own. Unlike TwinCAT 3, which actually implements real RPC, you can't call functions or function blocks remotely, due to the fact that it does not implement the IEC 61131-3 standard. The IEC 61131-3 actually allows you to have a somewhat modern high level programming language. Function blocks can have methods, which in return, can be called via the RPC protocol. Just my two cents. I find it rather misleading calling this RPC.

[@AutomationStation]

It isn't being advertised as RPC, the name of the protocol which is being used is called JSON-RPC www.jsonrpc.org/

[@saisumanth6663]

Permission denied

[@christianpfoertsch]

Have you authenticated using Api.Login and have you also passed the session token with the API calls?

[@marc2752]

i fucking hate my job