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FX Series Programmable Controlers Applied Instructions 5
5-8
5.1.3 SRET (FNC 02)
Operation:
SRET si
g
nifies the end of the current subroutine and returns the pro
g
ram flow to the step
immediatel
y
followin
g
the CALL instruction which activated the closin
g
subroutine.
Points to note:
a) SRET can onl
y
be used with the CALL instruction.
b) SRET is alwa
y
s pro
g
rammed after an FEND instruction - please see the CALL (FNC
01)
instruction for more details.
Mnemonic Function
Operands
Program steps
D
SRET
FNC 02
(
Subroutine
return
)
Returns operation
from a subroutine
pro
g
ram
N/A
Automaticall
y
returns to the step immediatel
y
followin
g
the CALL instruction which activated
the subroutine.
SRET:
1 step
Special subroutine timers:
• Because of the chance of intermittent use of the subroutines, if timed functions are
required the timers used must be selected from the ran
g
e T192 to T199 and T246 to
T249.
Details of usin
g
CALL with other pro
g
ram flow instructions
• Further details can be found on pa
g
es 7-12 and 7-13 about the combined use of different
pro
g
ram flow techniques (such as master control, MC etc).