Detailed description
2.14 Programming tips with STEP 7
Basic logic functions: PLC basic program solution line (P3 sl)
262
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
FUNCTION FC 99: VOID
Comment
BEGIN
NETWORK
TITLE =
L
P##Addr;
LAR1 ;
//Retrieve pointer from Addr
L
D [AR1,P#2.0];
//Offset part of pointer of variable
LAR1 ;
END_FUNCTION
2.14.7
Calling function blocks (FBs)
General
For optimizing the flow speeds, it is useful to call all function block calls with many static
parameters, such as the blocks FB 2, FB 3, FB 4, FB 5, FB 7 provided by the basic program,
in start-up itself with the related instance parameters. In the start-up (OB 100), the
preassignment of the parameters must be done, which can then no longer be changed in the
cyclic part (OB 1). These fixed parameter values are no longer parameterized in the cyclic
call, because they have already been written in the Instance DB.
Example of parameterization of FB 2 with instance DB 110
The following example shows how a useful distribution in OB 100 and OB 1 portion is to be
implemented. first, the usual call in the cyclic program is displayed.
CALL FB 2, DB 110 (
Req :=
M 100.0,
NumVar :=
2,
//Read 2 variables
Addr1 :=
NCVAR.C1_RP_rpa0_0
Line1 :
W#16#1
Addr2 :=
NCVAR.C1_RP_rpa0_0
Line2 .
W#16#2
Error :=
M1.0,
NDR :=
M1.1,
State :=
MW 2,
RD1 :=
P#M 4.0 REAL 1,
RD2 :=
P#M 24.0 REAL 1,
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...