Delta Electronics Extension Digital I/O Module DOP-EXIO14RAE - Manual (Page 87)

Appendix D Use of Application Instructions|DOP-EXIO Series
D-6 Revision March, 2008, Doc. Name: 2007PDD23000014
Mnemonic Operands Function
SRET None Subroutine Return
Bit Devices Word Devices
X Y M S K H KnX KnY KnM KnS T C D E F
y Note:
1. No operand.
2. No contact to drive the instruction is required.
16-bit instruction (1 Step)
SRET
Continuous
execution
- -
32-bit instruction
- - - -
y Flags: None
Explanations:
1. This instruction denotes the end of the subroutine program.
2. The subroutine will return to main program by SRET after the termination of subroutine and
execute the sequence program located at the next step to the CALL instruction.
Program Example 1:
When X0 = On, CALL instruction is executed and the program jumps to the subroutine designated by
P2. When SRET instruction is executed, the program returns to address 24 and continues its
execution.
X0
X1
CALL P2
Y1
20
P***
24
FEND
SRET
P2 Y0
Y0
Subroutine P2
subroutine return
call subroutine P***
Program Example 2:
1. When X10 goes from Off to On, its rising-edge trigger executes CALL P10 instruction and the
program jumps to the subroutine designated by P10.
2. When X11 is On, CALL P11 is executed and the program jumps to the subroutine designated by
P11.
3. When X12 is On, CALL P12 is executed and the program jumps to the subroutine designated by
P12.
4. When X13 is On, CALL P13 is executed and the program jumps to the subroutine designated by
P13.