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ANY, POINTER in SCL

Created by: andrewF at: 11/10/2010 11:15 AM (27 Replies)

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11/10/2010 11:15 AM	Rate (0)
andrewF Posts: 87 Rating: (1)	Maybe somebody know how I can realise initializing in SCL variable "ANY", "Pointer". For example in FBD i write to input of FB this P#DB125.DBX 0.0 BYTE 48 but how I can do this in SCL for internal variable???
andrewF Posts: 87 Rating: (1)
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11/10/2010 12:39 PM	Rate (1)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 5/26/2023 Posts: 6802 Rating: (1345)	Hello andrewf indirect addressing of global addresses in SCL is based on absolute addressing, for example for a bit you need 2 integer values (byte value and bit value). check the examples: I [byteaddress,bitaddress] QB [byteindex] regards
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11/10/2010 1:15 PM	Rate (23)
smiffy Platinum Expert Joined: 1/17/2007 Last visit: 5/31/2023 Posts: 1524 Rating: (522)	Easy:- In your TEMP definition area add:- pDB : ANY; // DB address ANY pointer - used for accessing DB data pAny AT pDB : STRUCT // Diassembled ANY pointer structure S7Code : BYTE; // Code for S7 (fixed at 16#10) DataType : BYTE; // Code for data type Length : INT; // Repetition factor = Send/receive length DBNumber : INT; // Data block Number MemoryArea : BYTE; // Specified memory area ByteAddressMSB : BYTE; // Byte address most significant bits ByteAddressLSB : WORD; // Byte address least significant bits END_STRUCT; Then you build your ANY pointer up with your details. The S7Code member is fixed at 16#10. The DataType member is set to your desired data type (16#01=BOOL, 16#02=BYTE, 16#03=CHAR, 16#04=WORD, 16#05=INT, 16#06=DWORD, 16#07=DINT, 16#08=REAL, 16#09=DATE, 16#0A=TOD, 16#0B=TIME, 16#0C=S5TIME, 16#0E=DT, 16#13=STRING). The Length member is set to the amount of data to access. The DBNumber member is set to your DB number. The MemoryArea is the code for the area of the PLC memory to wish to access (16#81=Input area (I), 16#82=Output area (O), 16#83=Bit memory area (M), 16#84=Shared Data Block (DB), 16#85=Instance Data Block (DI), 16#86=Local data (L stack), 16#87=Previous local data (V). The ByteAddressLSB / ByteAddressMSB are the address of the memory you wish to access. So for your particular case the code would be:- pAny.S7Code := 16#10; pAny.DataType := 16#02; pAny.Length := 48; pAny.DBNumber := 125; pAny.MemoryArea := 16#84; pAny.ByteAddressMSB := 0; pAny.ByteAddressLSB := 0; Now the pDB ANY pointer is setup to access DB 125 at address 0.0 with data length 48. If you need a different address then pAny.ByteAddressLSB should be modifed to your n.n address. E.G. to access DBX 5.4 the value would be (5 * 8) + 4 = 44. Generally, you can leave pAny.ByteAddressMSB at zero unless you are using very large DB's (greater than 8192 bytes). If you wish to do this, please tell me as you will need a bit more to do that. I didn't include it here as it could possibly cause confusion. Once built up, you can use your ANY pointer as you would with any other ANY pointer (e.g. in BLKMOV etc.)
	Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. So far, the universe is winning...
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11/10/2010 1:42 PM	Rate (0)
andrewF Posts: 87 Rating: (1)	Big thank you! It is very good example....I will try touse this....
andrewF Posts: 87 Rating: (1)
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6/22/2011 4:02 PM	Rate (0)
S_B_C Posts: 1 Rating: (0)	I have tried using this but and the function works fine when starting at DBX0.0 of the specified DB. If i for example want to start at DBX100.0 and writeDW#16#84000320 it doesn't work anymore. Everything goes well till DBX64.0 orDW#16#84000200. Any bigger value doesn't work with the block move function. Any ideas?
S_B_C Posts: 1 Rating: (0)
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6/23/2011 4:15 AM	Rate (0)
sunnyback Posts: 11 Rating: (0)	Maybe , you can use the system function BLKMOV to get it .
sunnyback Posts: 11 Rating: (0)
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6/25/2011 2:45 PM	Rate (0)
smiffy Platinum Expert Joined: 1/17/2007 Last visit: 5/31/2023 Posts: 1524 Rating: (522)	Can you upload your code / project I will have a look at it for you. Thanks.
	Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. So far, the universe is winning...
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6/27/2011 2:04 PM	Rate (1)
andrewF Posts: 87 Rating: (1)	Hi! After info from smiffy I get properly worked code (it is part of my codes for communication): " ............. ............. pAny.S7Code := 16#10; pAny.DataType := 16#02; pAny.Length := Kol; pAny.DBNumber := dbn; pAny.MemoryArea := 16#84; pAny.ByteAddressMSB := 0; pAny.ByteAddressLSB := 0; pAny2.S7Code := 16#10; pAny2.DataType := 16#02; pAny2.Length := L_get; pAny2.DBNumber := dbn3; pAny2.MemoryArea := 16#84; pAny2.ByteAddressMSB := 0; pAny2.ByteAddressLSB := 0; //--------------------------------------------------- IF step=2 OR step=4 OR step=5 OR step=7 THEN BsnP:=bl;// ELSE pAny3.S7Code := 16#10; pAny3.DataType := 16#02; pAny3.Length := Kol; pAny3.DBNumber := dbn4; pAny3.MemoryArea := 16#84; pAny3.ByteAddressMSB := 0; pAny3.ByteAddressLSB := 0; BsnP:=Bsn;// END_IF; rv_1:=I_GET( REQ :=((step=1 OR step=3) AND NOT procP) // ,CONT :=1 // ,IOID :=B#16#54 // ,LADDR :=La_1 // ,VAR_ADDR :=Va_1 // ,BUSY :=procG // ,RD :=bdt_1 // OUT: ANY ); // INT rv_2:=I_PUT( REQ :=((step=2 OR step=4 OR step=5 OR step=6 OR step=7) AND NOT procG)// ,CONT :=1 // ,IOID :=B#16#54 // ,LADDR :=La_1 // IN: WORD ,VAR_ADDR :=Va_1 // IN: ANY ,SD :=BsnP // IN: ANY ,BUSY :=procP // ); // INT ..... ..... " thanks.
andrewF Posts: 87 Rating: (1)
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7/12/2011 10:40 AM	Rate (1)
smiffy Platinum Expert Joined: 1/17/2007 Last visit: 5/31/2023 Posts: 1524 Rating: (522)	Excellent. Your code does look a bit strange though as I cannot see anywhere where you use the ANY poiters that you have so elegently constructed. But no matter, as long as you have it working.
	Programming today is the race between software engineers building bigger and better idiot proof programs, and the universe producing bigger and better idiots. So far, the universe is winning...
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7/12/2011 7:57 PM	Rate (0)
andrewF Posts: 87 Rating: (1)	Hi! Sorry I cutting a section of declaration for better understanding work of ANY but not for understanding of work my algorithm...... section of declaration: ........................................ ......................................... VAR_TEMP Va_1 : ANY; // указатель на ДБ bdt_1 : ANY; // указатель на ДБ Bsn : ANY; // указатель на блок отправляемых данных - управляющие данные pAny AT Va_1 : STRUCT // ракрытый функционал ANY укзателя в структурном виде S7Code : BYTE; // код зашитый в СТЕПЕ (строго фиксирован 16#10) DataType : BYTE; // тип кода см таблицу Length : INT; // кол-во данных DBNumber : INT; // номер блока данных MemoryArea : BYTE; // код типа памяти (см табл) BYTEAddressMSB : BYTE; // старший значащая часть адреса ByteAddressLSB : WORD; // старший значащая часть адреса END_STRUCT; pAny2 AT bdt_1 : STRUCT // ракрытый функционал ANY укзателя в структурном виде S7Code : BYTE; // код зашитый в СТЕПЕ (строго фиксирован 16#10) DataType : BYTE; // тип кода см таблицу Length : INT; // кол-во данных DBNumber : INT; // номер блока данных MemoryArea : BYTE; // код типа памяти (см табл) BYTEAddressMSB : BYTE; // старший значащая часть адреса ByteAddressLSB : WORD; // старший значащая часть адреса END_STRUCT; pAny3 AT Bsn : STRUCT // ракрытый функционал ANY укзателя в структурном виде S7Code : BYTE; // код зашитый в СТЕПЕ (строго фиксирован 16#10) DataType : BYTE; // тип кода см таблицу Length : INT; // кол-во данных DBNumber : INT; // номер блока данных MemoryArea : BYTE; // код типа памяти (см табл) BYTEAddressMSB : BYTE; // старший значащая часть адреса ByteAddressLSB : WORD; // старший значащая часть адреса END_STRUCT; BsnP : ANY; // указатель на блок отправляемых данных END_VAR ..................................................... /////in the middle section of codes ......................................... BsnP:=Bsn; ......................................... ............ for this part of code you can understand how I use a ANY pointer.......(sorry for russian comments)
andrewF Posts: 87 Rating: (1)	Last edited by: andrewF at: 7/12/2011 8:00 PM
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