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HARDWARE CONFIGURATION

Created by: GaJEnDrA D S at: 1/9/2013 11:40 AM (7 Replies)

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1/9/2013 11:40 AM	Rate (0)
GaJEnDrA D S Bronze Member Joined: 8/9/2011 Last visit: 11/1/2023 Posts: 324 Rating: (19)	Hi all , The CPU will go to ERROR Mode if Hardware configuration in TIA Project doesn't match the hardware connection on Din-rail. In our project we are looking for a generalized Software to different customers.We don't have problem with program blocks but with the hardware configuration where the number of expansion modules varies with different customers Thanks
	"Any intelligent fool can make things bigger, more complex. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.":):)
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1/9/2013 12:54 PM	Rate (1)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 3/15/2025 Posts: 2957 Rating: (243)	Hello, You need to adapt HW for every customer normally. If you don't want to do that, you can add OB82, OB85 and probably OB122. Then you will see that CPU has SYS FLT, but it won't stop. Anyway, I can't understand how program can be the same, but HW differ? As I understand, If you have lets say DI module, you should use it's inputs in your program. If you don't use HW module in your program then you don't need it in HW. Can you explain that application ?
	Best regards, Darius
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This contribution was helpful to 1 thankful Users 0_Einstein

1/9/2013 4:12 PM	Rate (1)
Ganes10 Platinum Member Joined: 8/31/2010 Last visit: 4/19/2025 Posts: 1524 Rating: (231)	GAJENDRADS Hi all , The CPU will go to ERROR Mode if Hardware configuration in TIA Project doesn't match the hardware connection on Din-rail. In our project we are looking for a generalized Software to different customers.We don't have problem with program blocks but with the hardware configuration where the number of expansion modules varies with different customers Thanks Hello GAJENDRADS, Have a look on this. Configuring the operation of the CPU The same excerpt is mentioned below. Supported hardware compatibility: Configures the substitution strategy for all system components (SM, SB, CM, CP and CPU): Allow acceptable substitute Allow any substitute (default) Each module internally contains substitution compatibility requirements based on the number of I/O, electrical compatibility, and other corresponding points of comparison. For example, a 16-channel SM could be an acceptable substitute for an 8-channel SM, but an 8-channel SM could not be an acceptable substitute for a 16-channel SM. If you select "Allow acceptable substitute", STEP7 enforces the substitution rules; otherwise, STEP7 allows any substitution.
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1/11/2013 5:35 AM	Rate (0)
GaJEnDrA D S Bronze Member Joined: 8/9/2011 Last visit: 11/1/2023 Posts: 324 Rating: (19)	HiDarius We have a basic machine configuration which needs only I/O module in addition to CPU. But in our advanced machine we need 2 I/O modules.If you release the software for Advanced machine as a general one, it works for the just basic machine too as we have a selection in HMI.It doesn't matter for the customer whatever is configured in the program but he doesn want spend on that 2nd module for the just BASIC machine. Is it a good idea to let the CPU running with system fault?
	"Any intelligent fool can make things bigger, more complex. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.":):)
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1/11/2013 12:28 PM	Rate (1)
Darius Platinum Expert Joined: 9/28/2005 Last visit: 3/15/2025 Posts: 2957 Rating: (243)	Hi, Well at least machine will work with that kind of SF, but in my point of view it is very bad idea. Imagine that you are the customer, you don't know nothing about PLC and you get new equiment which constantly gives me system fault. Can you imagine ?I don't know about you, but my first step in that case would be to call to manufacturer. So my advice - don't do that !. You have 2 variants of equipment, 2 variants of program, so there is no problem to have 2 varians of HW config. Thats my thoughts.
	Best regards, Darius
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1/11/2013 4:12 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 4/21/2025 Posts: 15810 Rating: (2496)	Another thought is to create a library with both versions of your PLC hardware configuration, two PLC tag tables with the 2nd group just adding the advanced tags. In the PLC & HMI, only point to physical hardware that exists so you do not get diagnostics entries on hmi/plc should a screen access I/O that is not connected. You really do not want errors when there are none. To get around it, you can also have I/O mapping that adds the advanced machine's additional I/O to map physical I/O to internal tags. The M or DB tags could always exist and be accessed by the HMI, but just add the PLC hardware, tags, and an IO mapping function call, and you have your advanced machine. Hope this makes sense.
	science guy
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3/19/2013 10:50 AM	Rate (0)
GaJEnDrA D S Bronze Member Joined: 8/9/2011 Last visit: 11/1/2023 Posts: 324 Rating: (19)	Hellowhuggy_d1 . Could you please explain this part in detail huggy_d1 To get around it, you can also have I/O mapping that adds the advanced machine's additional I/O to map physical I/O to internal tags. The M or DB tags could always exist and be accessed by the HMI, but just add the PLC hardware, tags, and an IO mapping function call, and you have your advanced machine. Hope this makes sense. Thanks
	"Any intelligent fool can make things bigger, more complex. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.":):)
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3/19/2013 1:06 PM	Rate (0)
0_Einstein Diamond Expert Joined: 7/7/2010 Last visit: 4/21/2025 Posts: 15810 Rating: (2496)	GAJENDRADS Hellowhuggy_d1 . Could you please explain this part in detail huggy_d1 To get around it, you can also have I/O mapping that adds the advanced machine's additional I/O to map physical I/O to internal tags. The M or DB tags could always exist and be accessed by the HMI, but just add the PLC hardware, tags, and an IO mapping function call, and you have your advanced machine. Hope this makes sense. Thanks Ok I will try. I have 2 routines, FC_map_inputs, and FC_map_outputs. The map inputs FC sets DB and M bits based on physical inputs. I run this first in my main OB. {Yes, I know it is not necessary because the portal makes it easy to remap I/O in the tag table} I then access my mapped inputs instead of my physical inputs. Likewise, I have an FC that runs in the OB with the highest OB #, called zLastOB_2000 with OB # 2000. I put anything I want to run that fixes order of solve problems and lastly, to map my internal M and DB bits to physical outputs. The only time I access physical I/O directly is if I need to access the data in a cyclic interrupt to get the most updated value, like for a control loop reading via profinet/profibus where the values may change several times during a single logic scan. I have only had to do this one time so far and it had a little bit of a headache to only read that data if the remote I/O was actually present - otherwise the diagnostic buffer fills up very fast, and the logic slows down. Now your plc logic can run. In the map inputs and map outputs FCs, you can remove the physical I/O not present in your machine and leave the rest of the logic intact because it will not affect your non-existent devices since nothing attempts to sense or control them.
	science guy
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