Delta Electronics Extension Digital I/O Module DOP-EXIO14RAE - Manual (Page 80)

Appendix C Use of Basic Instructions|DOP-EXIO Series
Revision March, 2008, Doc. Name: 2007PDD23000014 C-15
indicates the end of a step ladder diagram starting from S0 ~ S9 and the bus returns to a normal ladder
diagram instruction. The No. of S cannot be repeated.
Mnemonic Functions
RET Step Transition Ladder Return Command
Operand None
Explanations:
RET indicates the end of a step. There has to be a RET instruction in the end of a series of steps. One
EXIO program can be written in maximum 10 steps (S0 ~ S9) and every step should end with a RET.
Program Example:
Ladder diagram:
M1002
ZRST S0 S127
SET S0
SET S20
Y0
SET S30
Y1
SET S40
Y2
S0
RET
END
X0 S0
S
S20
S
X1
S30
S
X2
S40
S
X3