10/20/2009 8:42 AM | |
Joined: 3/14/2008 Last visit: 10/15/2024 Posts: 2111 Rating: (942) |
Hello guys, I want to get started the "best "way: It is not clear to me how todefine the isa88 structure in pcs7. This is my definition but I don'tknow if it's correct: The plant is a process to recycle aluminium. There are different machines present which have different functions: - a drum that will be heated and rotating - a second drum in line with the first drum - a burner which heats up drum 1 - a burner which heats up drum 2 - a gastreament device that purify gasses - a cooling cabinet to cool down gasses - a transport system from six silo's to the first drum - a transport system from the 1st drum to the second - a transport system from the 2nd drum to a press (very basic but these are the "sub"processes present) Define according to ISA88: The Process Cell is the whole plant with all the processes. So I only need one process cell Units are the "sub"processes that are listed above: transport 1, transport 2, drum 1, drum 2 etc Equipment modules are the actions within a unit, so for example the first drum: - has supply of nitrogen - has supply of demiwater - has a frequency drive to control the drum rotating - has a burner management system which regulates the heating of the drum - has an inlet system - has an outlet system control modules are the individual valves, motors, sensors etc.. What do you guys think about this setup?? Thank you Best regards |
If I could help you, you can use the RATE button. Thank you. |
|
10/20/2009 9:26 AM | |
Joined: 4/5/2006 Last visit: 10/10/2024 Posts: 917 Rating: (63) |
Hi Sandor-CRX, ISA88 definition is used by SIMATIC Batch Addon for PCS7. You don't need it if don't use batch. Anyway, if you have PCS7 installed have a look for project example called zen33_01.zip (in Step 7 project example folder) and follow instraction described in PCS7 manual "SIMATIC BATCH - Getting Started (PDF)". Regards |
10/20/2009 10:38 AM | |
Joined: 3/14/2008 Last visit: 10/15/2024 Posts: 2111 Rating: (942) |
Ok, thank you, I think i have a continu and batch process. The main material are caps but we are doing a research to use different materials. One drum only uses caps but the other drum will use different materials. The only thing that need to change is temperature of the drums,rotation speed and a few more.. Does this mean that I have to program according to isa88? What is your advice |
If I could help you, you can use the RATE button. Thank you. |
|
10/20/2009 11:35 AM | |
Joined: 3/14/2008 Last visit: 10/15/2024 Posts: 2111 Rating: (942) |
Level 1 Process cell = Complete plant Level 2 Unit = Drum2 Level 3 Function = Input_material Level 3 function = Output material Level 3 function = Burner management Level 3 function =Gassupply Level 3 function =Compressed air supply Level 2 Unit = Drum1 Level 3 Function = Input_material Level 3 function = Output material Level 3 function = Burner management Level 2 Unit =Transport1 Level 3 Function =Transport_material something like this? |
Last edited by: Sandor-CRX at: 10/20/2009 11:38 AMIf I could help you, you can use the RATE button. Thank you. |
|
10/20/2009 12:47 PM | |
Joined: 3/14/2008 Last visit: 10/15/2024 Posts: 2111 Rating: (942) |
And what about the utility systems like compressed air, natural gas and demiwater. How do I need to add them to the structure? |
If I could help you, you can use the RATE button. Thank you. |
|
10/20/2009 1:50 PM | |
Joined: 4/5/2006 Last visit: 10/10/2024 Posts: 917 Rating: (63) |
Hi Sandor-CRX , as well as i said above, you MUST USE ISA88 definition in PCS7 structure when you use SIMATIC Batch Addon. If you don't use it, ISA88 is not necessary (but you can use if you like it). Usually UNIT defined like basic system: Reactor, Tank, Drum, Colum ...all of this about Batch Process. NON UNIT could be the system about utilities supply (hydraulic system, air compressor and so on....) that are not Batch related. FUNCTION are all loop used into the UNIT like pressure control system (or "input material loading" in your plant) and DEVICES are all items (motors, valve, PID controller....) used into the FUNCTION. At the end: if "Compressed air supply" if for that unit only, it'sfine where you planned (lvl 3 into the unit); but don't use it like FUNCTION in SIMATIC Batch (not batch related, i guess). Change position/substructure level into the project daoen't affect your plc program but the way information sent from AS to OS: for example at which level "OS Aes" has been defined... Hope can help REagrds |
Follow us on