5/7/2020 2:42 PM | |
Joined: 2/1/2010 Last visit: 9/25/2024 Posts: 150 Rating: (71) |
electricman I don't think anyone here so far was assuming he would use PCS7 IL blocks in the 300. He would use the S7 IL blocks in the 300. Those do not have ALARM_8P embedded and so they work just fine in the S7 controller, because they have implemented ALARM_DQ and ALARM_SC. S7 IL blocks are a viable option, but it sounds like OP does not want to reprogram the whole 300 anyhow. The only drawback (if you have a large skid) of the IL blocks are the limitations of ALARM_S and ALARM_D objects in the PLC according to this FAQ and other documents: https://support.industry.siemens.com/cs/ww/en/view/841294
nicosub I think for anyone to answer the question, you need to decide what kind of master/slave are you trying to accomplish. If you are just going to leave the 300 'as-is' and send supervisory points back and forth from the 400 and use 400 as the front end to PCS7, then all you need is to create a S7-communication link between them. You might need an extra CP343-1/443-1 card for each depending on your existing network setups. Then you would have to create some global DBs to send the data back and forth and pack/unpack the data to use between them elsewhere in each code. You can use GET/PUT or SEND/RECV but I know there may be some strong opinions here about which way is 'correct'. There are other options, but it depends on your preference and goals. Personally I would forgo the master slave and just reprogram the 300 with S7 IL. Master/Slave is really going to be like have double control modules for everything and its not going to be as straightforward as you expect. |
Last edited by: Jen_Moderator at: 05/08/2020 07:26:02Optimized link. If my post helped you, please rate. Thanks. |
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This contribution was helpful to1 thankful Users |
5/12/2020 10:11 PM | |
Joined: 7/15/2014 Last visit: 8/2/2024 Posts: 19 Rating: (4) |
Hello again, you can see the following link for IL for S7-300 https://support.industry.siemens.com/cs/ww/en/view/50708061 Nice day electricman |
Last edited by: Jen_Moderator at: 05/13/2020 09:52:34Optimized link. |
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