Delta DVP-ES2 - Manual (Page 630)

D V P - E S 2 E X 2 / S S 2 / S A2 / S X 2 / S E O p e r a t i o n M a n u a l - P r o g r a m m i n g
STL diagram. However, there are restrictions on some of the instructions. Care should be taken
when using the instructions listed in the table below.
Basic Instructions Applicable in a Step
Basic instruction
Step point
LD/LDI/LDP/LDF
AND/ANI/ANDP/ANDF
OR/ORI/ORP/ORF
INV/OUT/SET/RST
ANB/ORB
MPS/MRD/MPP
MC/MCR
Primary step point/ General step point Yes Yes No
General output Yes Yes No
Diverging step
point/
Converging
step point
Step point transfer Yes Yes No
1. DO NOT use MC/MCR instruction in the step.
2. DO NOT use STL instruction in a general subroutine or interruption subroutine.
3. CJ instruction can be used in STL instruction, however this is not recommended because the
actions will thus become more complicated.
4. Position of MPS/MRD/MPP instruction:
Ladder diagram:
Y1
S
S
M0
Y2
X2
n
X3
X1 X0
MPP
MRD
MPS
BUS
LD X0
Instruction code:
STL Sn
LD X0
MPS
AND X1
OUT Y1
MRD
AND X2
OUT M0
MPP
AND X3
OUT Y2
Explanation:
MPS/MRD/MPP instruction
cannot be used directly on
the new bus. You have to
execute LD or LDI
instruction first before
applying MPS/MRD/MPP.
Other Points to Note:
1. The instruction used for transferring the step (SET S□ or OUT S□) are suggested to be
executed after all the relevant outputs and actions in the current step are completed.
The execution results by the PLC are the same. However, if there are many conditions or
actions in S10, it is recommended to modify the diagram in the left into the diagram in the right,
which executes SET S20 after all actions are completed. The sequence will be more
understandable and clear with this modification.
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