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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 output
data in A604 through A607 is written to D through D+3 before program execu-
tion is returned.
Precautions
When the subroutine isn’t 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 the 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
Applicable Program Areas
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
Block program areas
Step program areas
Subroutines
Interrupt tasks
OK
OK
OK
OK
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...