CLP S7 300 E S7 400

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CLP S7 300 E S7 400

  1. 1. Creating and calling up blocks SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  2. 2. Structure of an SCL source file FUNCTION_BLOCK FB10 DB5 Attributes FB10 Declaration part FC62 Instruction part FC61 END_FUNCTION_BLOCK OB1 SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  3. 3. Beginning and end of blocks (e.g. function block) FUNCTION_BLOCK FB10 Attributes Key words for beginning and end of blocks Declaration part Begin (* Instruction part *) END_FUNCTION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  4. 4. Block attributes FUNCTION_BLOCK FB10 Attributes Declaration part Begin (* Instruction part *) END_FUNCTION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename: TITLE='Controller' VERSION:'2.1' KNOW_HOW_PROTECT AUTHOR:Training NAME:Mot FAMILY:ANALOG {S7_m_c:='true'; S7_blockview:='big'}
  5. 5. Declaration part FUNCTION_BLOCK FB10 Attributes Declaration part VAR Value1,Value2,V33:INT; END_VAR Begin VAR_INPUT IN1,IN2:BOOL; END_VAR (* Instruction part *) END_FUNCTION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. CONST FIX_VALUE:=5; P_Part:=0.8; END_CONST Date: 6.10.00 Filename: VAR_OUTPUT Q01:BOOL; Display:INT; END_VAR
  6. 6. Instruction part BEGIN FUNCTION_BLOCK FB10 // Example bit operation, arithmetic Q0.0 := I0.0 AND I0.1; MW20 := MW22 + MW24; Attributes Declaration part // Example value allocation Measured value:=0 ; // Example control instruction IF I1.1 THEN N:=0; SUM:=0.0; ELSIF START = TRUE THEN N:=N+1; SUM:=SUM + IN; ELSE OK:=FALSE; END_IF; Begin (* Instruction part *) END_FUNCTION_BLOCK // Example of calling up a sub-program FB10.DB2(Pa1:=10,Pa2:=MW2); Result:=DB2.MVal7; SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  7. 7. Structure of organisation blocks(OBs) FUNCTION FC62 : BOOL VAR_INPUT IN1 : BOOL; IN2 : BOOL; END_VAR BEGIN ..... Instead of OB1, a name from the symbol table can be used. FC62 := IN1 AND IN2; ..... END_FUNCTION //******************************************* * FUNCTION FC61 : VOID BEGIN ..... There must be a declaration of 20 bytes local data! Further temporary local variables can be declared Q0.0 := I0.0 AND I0.1; ..... END_FUNCTION //******************************************* * ORGANIZATION_BLOCK OB1 VAR_TEMP info : ARRAY[0..19] OF BYTE; END_VAR BEGIN FC61(); Q4.0 := FC62(IN1:=I4.0,IN2:=I4.1); Q4.1 := M10.4; SCL source file END_ORGANIZATION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. Call-up of the FC61, which has no input / output parameters and no return value Call-up of the FC62, which has input parameters and a return value. Any commands. Can be written in absolute or symbolic form. Date: 6.10.00 Filename:
  8. 8. Structure of functions (FCs and SFCs) FUNCTION FC62 : BOOL VAR_INPUT IN1 : BOOL; IN2 : BOOL; END_VAR BEGIN ..... Blocks in CFC FC62 := IN1 AND IN2; ..... END_FUNCTION //******************************************* * FUNCTION FC61 : VOID BEGIN ..... Q0.0 := I0.0 AND I0.1; ..... END_FUNCTION //******************************************* * ORGANIZATION_BLOCK OB1 VAR_TEMP info : ARRAY[0..19] OF BYTE; END_VAR BEGIN FC61(); Q4.0 := FC62(IN1:=I4.0,IN2:=I4.1); Q4.1 := M10.4; SCL source file END_ORGANIZATION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. Blocks in FBD Date: 6.10.00 Filename:
  9. 9. Structure of functions (FCs and SFCs) FUNCTION FC63 : REAL VAR_INPUT x1,x2: REAL; y1,y2: REAL; END_VAR VAR_OUTPUT GRADIENT: REAL; END_VAR //FC63 describes the distance //between 2 points and the //gradient of the line BEGIN FC63 := SQRT((x2-x1)**2 + (y2-y1)**2); GRADIENT := (y2-y1)/(x2-x1); END_FUNCTION //************************************************************************ ORGANIZATION_BLOCK OB1 VAR_TEMP info : ARRAY[0..19] OF BYTE; inclination : REAL; distance: REAL; END_VAR BEGIN distance:=FC63(x1:=1,x2:=3,y1:=1,y2:=5, GRADIENT:= inclination); MD0 := inclination; // MD0 and MD4 declared in MD4 := distance; // symboltable as REAL !! ....... ........ END_ORGANIZATION_BLOCK Siemens AG 2000. All rights reserved. x ce tan dis y1 x x1 SCL source file SIMATIC S7 y2 Date: 6.10.00 Filename: x2
  10. 10. Structure of functions (FCs and SFCs) IF (x2-x1)=0 OR STEIGUNG <0 THEN OK:=FALSE; ELSE OK := TRUE; END_IF; FDB Execute FC62 only if FC63 runs correctly. ENO and EN can be used to „connect“ blocks. OB1 FC63 SCL programcode in OB1: distance:=FC63(x1:=MW10,......); Error_FC63:=ENO; // call FC63 // ENO from FC63 FC62 // call FC62 only if FC63 was ok: FC62(EN:=Error_FC63,STEIG := inclination,WINKEL:=MD20); SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename: SCL
  11. 11. Structure of function blocks (FBs and SFBs) Supply: VAR_INPUT VAR_IN_OUT OB1 Supply: VAR_INPUT VAR_IN_OUT FC64 FCs: FBs: Call-up with supply and get the results in one instruction Call-up with supply xyz:= IN1; : : OUT1:= uvw; Get results in a second instruction Results: RET_VAL VAR_OUTPUT VAR_IN_OUT Siemens AG 2000. All rights reserved. VAR VAR_INPUT VAR_IN_OUT VAR_OUTPUT Results: VAR_OUTPUT VAR_IN_OUT no RET_VAL Within an OB and FC, there are only temporary variables. In the next cycle, they are no longer available. SIMATIC S7 FB10 Instance DB DB2 Within an FB, there are temporary and static variables. The static and output variables are saved in the instance DB, which means that they are available during the next cycle. Date: 6.10.00 Filename:
  12. 12. Structure of function blocks (FBs and SFBs) Call-up with supply Absolute call-up FB10.DB2(x1:=5,x2:=delta,x3:=MW20); Parameter supply: FBs are only supplied with input and in/out parameters. Parameters which are not supplied retain their last value. Instanz- DB No output parameter, no return value. Motor.Mx7(x1:=5,x2:=delta,x3:=MW20); Symbolic call-up Access to output parameters Caller variables Instance DB of the FB result := DB2.speed; MW22:= Mx7.amp; Output parameter of the FB SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  13. 13. Structure of function blocks (FBs and SFBs) SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  14. 14. FB2 2 Multi-instance, local instances    FUNCTION_BLOCK FB22 OB1 VAR_OUTPUT OUTPUT, VALUE : DINT; END_VAR BEGIN ... END_FUNCTION_BLOCK FUNCTION_BLOCK FB11 VAR Test, Status : DINT; Regulator_1, Regulator_2 : FB22; END_VAR BEGIN ... Regulator_1(); Regulator_1 Test:= Regulator_1.OUTPUT; Regulator_2(); Status :=Regulator_2.OUTPUT; ... END_FUNCTION_BLOCK Regulator_2 ORGANIZATION_BLOCK OB1 ... BEGIN ... FB11.DB33(); ... END_ORGANIZATION_BLOCK SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename: FB11 Regulator_1 FB2 2 Regulator_2 DB33 Test Status DB33 OUTPUT VALUE OUTPUT VALUE
  15. 15. Structure of data blocks (DBs) Data view Declaration view SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:
  16. 16. How to access Data Blocks FUNCTION FC111 : VOID VAR_TEMP switch : WORD; S_Bit : BOOL; i_byte,i_bit : INT; END_VAR BEGIN ..... ...... switch := DB6.DW8; switch := Data.Motor.Codierer; switch := Data.DW8; switch := DB6.Motor.Codierer; S_Bit := DB6.DX[i_byte,i_bit]; S_Bit := Data.DX[i_byte,i_bit]; ....... ....... END_FUNCTION SIMATIC S7 Siemens AG 2000. All rights reserved. // complete absolut addressing // complete symbolic addressing // mixed symbolic and absolut // addressing // indirect addressing // indirect addressing Important for loops Date: 6.10.00 Filename:
  17. 17. Structure of user-defined data types (UDTs) Declaration of an UDT TYPE UDT1 STRUCT Power : REAL; Speed : INT; Motor : STRUCT Ein0 : BYTE; // Byte no. 0 Codierer : WORD; // Coding switch Zahlen : ARRAY[1..4] OF INT; Aus4 : BYTE := 16#2E; Zeichen : STRING[8]:= 'SIEMENS'; Anz : WORD := 16#123a; END_STRUCT; END_STRUCT END_TYPE SCL source file SIMATIC S7 Siemens AG 2000. All rights reserved. Date: 6.10.00 Filename:

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