Detailed description
2.12 Block descriptions
Basic logic functions: PLC Basic program powerline (P3 pl)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
109
2.12.2
FB 2: Read GET NC variable
Description of Functions
The PLC user program can read variables from the NCK area using FB GET. This function
block is capable of multi-instances and an instance-DB from the user area belongs to the FB
2.
When FB 2 is called with a positive signal edge change at control input "Req", a job is
started, which reads the NCK variables referenced by ADDR1ADDR8 and then copies them
to the PLC operand areas referenced by RD1 to RD8. Successful completion of the read
process is indicated by a logical "1" in status parameter NDR.
The read process lasts for several PLC cycles (normally 1-2). The block can be called up in
cyclic mode only.
Any errors are indicated by Error and State.
In order to reference the NC variables, all required variables are first selected with the "NC
VAR selector" tool and generated as STL source in a data block. A name must then be
assigned to this DB in the symbol table.
"DB name.S7 name" is transferred as the actual parameter of the NCK variable address
(Addr1 to Addr8) when FB 2 is called.
Variable addressing
For some NC-variables, it is necessary to select area no. and/or line or column from the NC-
VAR selector. A basic type can be selected for these variables,
i.e., area/column/line are preset to "0".
The contents of the area number, line and column specified by the NC VAR selector are
checked for a "0" in the FB. If a "0" is present, the value is transferred to the input parameter.
The user must supply the required parameters (UnitX/ColumnX/LineX) before calling FB
GET.
Here, unit corresponds to the area No., column to the column and line to the row.
Notice
FB 2 can read NC variables only
if basic program parameter NCKomm ="1" has been set (in OB 100: FB 1, DB 7). The call is
permitted only in cyclic program OB 1.
When channel-specific variables are read, in a task (FB 2-call)
via Addr1 to Addr8 only the variables of exactly one channel may be addressed.
In areas V and H, different logic axis numbers must not be assigned in one job. (Failure to
observe this rule results in Error:= TRUE, State:= W#16#02).
Содержание SINUMERIK 840D sl
Страница 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 286: ...Table of contents Basic logic functions Diagnostic tools D1 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 328: ...Constraints Basic logic functions Diagnostic tools D1 46 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 330: ...Examples Basic logic functions Diagnostic tools D1 48 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 340: ...Table of contents Basic logic functions Travel to fixed stop F1 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 342: ...Brief Description Basic logic functions Travel to fixed stop F1 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 382: ...Supplementary conditions Basic logic functions Travel to fixed stop F1 46 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Страница 790: ...Table of contents Basic logic functions Axes coordinate systems frames K2 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 946: ...Table of contents Basic logic functions Emergency Stop N2 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 948: ...Brief Description Basic logic functions Emergency Stop N2 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 956: ...Restrictions Basic logic functions Emergency Stop N2 14 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 958: ...Examples Basic logic functions Emergency Stop N2 16 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 966: ...Table of contents Basic logic functions Transverse axes P1 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 978: ...Supplementary conditions Basic logic functions Transverse axes P1 16 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 980: ...Examples Basic logic functions Transverse axes P1 18 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 982: ...Data lists 5 1 Machine data Basic logic functions Transverse axes P1 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 984: ...Index Basic logic functions Transverse axes P1 22 Function Manual 11 2006 6FC5397 0BP10 2BA0 Work offset external 13 ...
Страница 990: ...Table of contents Basic logic functions PLC Basic program powerline P3 pl 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1268: ...Supplementary conditions Basic logic functions PLC Basic program powerline P3 pl 284 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1270: ...Examples Basic logic functions PLC Basic program powerline P3 pl 286 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1280: ...Table of contents Basic logic functions PLC basic program solution line P3 sl 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1542: ...Examples Basic logic functions PLC basic program solution line P3 sl 268 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1604: ...Examples Basic logic functions Reference Point Approach R1 58 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1616: ...Brief Description Basic logic functions Spindles S1 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1703: ...Basic logic functions Spindles S1 Function Manual 11 2006 6FC5397 0BP10 2BA0 93 Constraints 3 No supplementary conditions apply ...
Страница 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1776: ...Detailed description 2 3 Feedrate control Basic logic functions Feeds V1 60 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1786: ...Data lists 5 3 Signals Basic logic functions Feeds V1 70 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1794: ...Table of contents Basic logic functions Tool Offset W1 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1798: ...Short description Basic logic functions Tool Offset W1 10 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1992: ...Data lists 5 3 Signals Basic logic functions Tool Offset W1 204 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 2002: ...Brief description Basic logic functions NC PLC interface signals Z1 6 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Страница 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...