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824
Subroutines
Section 3-19
3-19-4 SUBROUTINE RETURN: RET(093)
Purpose
Indicates the end of a subroutine program. Used in combination with
SBN(092) to define a subroutine region.
Ladder Symbol
Variations
Applicable Program Areas
Description
RET(093) indicates the end of a subroutine and SBN(092) indicates the
beginning of a subroutine. See 3-19-3 SUBROUTINE ENTRY: SBN(092) for
more details on the operation of subroutines.
When program execution reaches RET(093), it is automatically returned to
the next instruction after the SBS(091) or MCRO(099) instruction that called
the subroutine. When the subroutine has been called by MCRO(099), the out-
put data in A604 through A607 is written to D through D+3 before program
execution is returned.
Place the subroutine program area (SBN(092) to RET(093)) in the same task
as the SBS(091) or MCRO(099) instruction of the same number. Subroutines
in other tasks cannot be called.
Precautions
When the subroutine is not being executed, the instructions are treated as
NOP(000).
Example
See 3-19-3 SUBROUTINE ENTRY: SBN(092) for examples of the operation
of RET(093).
3-19-5 GLOBAL SUBROUTINE CALL: GSBS(750)
Purpose
Calls the global subroutine with the specified subroutine number and exe-
cutes that program. The same global subroutine can be called from two or
more tasks.
This instruction is supported by CS1-H, CJ1-H, CJ1M, and CS1D CPU Units
only.
GSBS(750) is used in combination with GSBN(751) and GRET(752), the
GLOBAL SUBROUTINE ENTRY and GLOBAL SUBROUTINE RETURN
instructions.
Ladder Symbol
Variations
RET(093)
Variations
Executed Each Cycle for ON Condition
RET(093)
Immediate Refreshing Specification
Not supported
Block program areas
Step program areas
Subroutines
Interrupt tasks
Not allowed
Not allowed
OK
OK
N: Global subroutine number
GSBS(750)
N
Variations
Executed Each Cycle for ON Condition
GSBS(750)
Executed Once for Upward Differentiation
@GSBS(750)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification
Not supported
Содержание SYSMAC CS Series
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Страница 186: ...146 List of Instructions by Function Code Section 2 4 ...
Страница 194: ...154 3 35 4 MOVE BIT MOVBC 568 1273 3 35 5 BIT COUNTER BCNTC 621 1275 3 35 6 GET VARIABLE ID GETID 286 1277 ...
Страница 1320: ...1280 Model Conversion Instructions Unit Ver 3 0 or Later Section 3 35 ...
Страница 1390: ...1350 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...
Страница 1391: ...1351 Appendix A ASCII Code Table ASCII SP Four leftmost bits Four rightmost bits ...
Страница 1392: ...1352 ASCII Code Table Appendix A ...
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