12/21/2019 8:16 PM | |
Joined: 10/25/2019 Last visit: 2/28/2024 Posts: 276 Rating: (20) |
Tell me about this! Such a monster (with price over 3.8k Euro) simple must run OBs at range below 1ms. CaOd, as I understood the library itself is not freely available. Or? BR *************** Update *************** OK, I guessed by myself that library is kindly provided and had gotten that in my project. Then I tried to follow the manual steps. But, in the manual, no words.... It needs to have a special capability to screw up such a simple manual. What does really mean "access"? Who wrote this [snip]? BR *************** Update *************** Also I followed the steps in Chapter 2.2.2. TIA portal makes a mistake while compilation. And I agree with it. Two functional blocks cannot be with the same DB. But it's written and shown in manual! AttachmentChapter 2.2.2.pdf (359 Downloads) |
Last edited by: HBCM_ at: 12/21/2019 20:38:22Last edited by: HBCM_ at: 12/22/2019 16:39:15Last edited by: Jen_Moderator at: 12/23/2019 10:36:38Removed insult. Last edited by: HBCM_ at: 12/23/2019 11:47:20 |
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12/23/2019 11:39 AM | |
Joined: 9/9/2014 Last visit: 3/26/2024 Posts: 242 Rating: (40) |
Hello, This is not [snip] - it is the truth of life - it is really very difficult to calculate the controller cycle time Read my answers on topic about the 400 series of controllers: Absolute minimum scan cycle time All calculations are mainly reduced to approximate calculations. If you have there is accurate data on how much and what instruction takes the PLC - are you sure that you can calculate all of them ??? I am sure that the calculation of the instructions inside the block is possible, but not always advisable. Here is an example You Snooze, You Lose: Measuring PLC Cycle Times under Attacks Testing on a simulator does not provide accurate data - yes, unfortunately it is) Review the FAQ below: SIMATIC S7-1500, S7-1500R/H, ET 200SP, ET 200pro Cycle and response times With S7-1200/S7-1500, how do you measure the total cycle time of an organization block? Topic: Cycle time of previous OB1 scan (milliseconds) For example, you can use the instruction "RUNTIME" - to measure the execution time of a block. Based on this intuition built -> SIMATIC S7-1500 Profiling Of course, you can not worry - and immediately buy a powerful and expensive PLC (if the customer is willing to pay for it) Or try to calculate with the help of a simulation and your common sense - chose what you need) I hope if my opinion help you |
Last edited by: Jen_Moderator at: 12/25/2019 12:12:45Optimized links. Last edited by: Jen_Moderator at: 12/25/2019 12:13:50Removed insult. Best Regards |
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This contribution was helpful to3 thankful Users |
12/23/2019 12:01 PM | |
Joined: 10/25/2019 Last visit: 2/28/2024 Posts: 276 Rating: (20) |
Regarding [snip]. The author easily could use various English words and expressions like.
and finally
Totally don't understand what means word "access" in this case! *************** Update *************** Also I followed the steps in Chapter 2.2.2. TIA portal makes a mistake while compilation. And I agree with it. Two functional blocks cannot be with the same instance DB. But it's written and shown in manual! BR AttachmentChapter 2.2.2.pdf (357 Downloads) |
Last edited by: HBCM_ at: 12/23/2019 12:04:10Last edited by: HBCM_ at: 12/23/2019 12:13:42Last edited by: HBCM_ at: 12/23/2019 12:14:21Last edited by: Jen_Moderator at: 12/25/2019 12:14:32Removed insult. |
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12/23/2019 12:40 PM | |
Joined: 10/25/2019 Last visit: 2/28/2024 Posts: 276 Rating: (20) |
What about the second part of the problem? Have you tried to compile two identical FB with the same instance DB? BR |
12/23/2019 3:11 PM | |
Joined: 10/25/2019 Last visit: 2/28/2024 Posts: 276 Rating: (20) |
that's clear! I'm doing that on real hardware. I've put all blocks according to manual in OB1 and OB30. Only thing I don't understand and TIA portal struggles on it also, that two FB can't work with the same instance DB. Look at the attachment. The thing you suggested doesn't comply the manual. So... what assurance is that it will issue plausible results. We didn't follow the manual once at the beginning. Holy smoke! BR AttachmentChapter 2.2.2.pdf (287 Downloads) |
Last edited by: HBCM_ at: 12/23/2019 15:14:32 |
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This contribution was helpful to2 thankful Users |
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