DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

DVP-ES2EX2/SS2/SA2/SX2/SE Operation Manual - Programming
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
LD/LDI/LDP/LDF
Basic instruction
AND/ANI/ANDP/ANDF ANB/ORB
OR/ORI/ORP/ORF MPS/MRD/MPP
Step point
INV/OUT/SET/RST
MC/MCR
Primary step point/ General step point Yes Yes No
Diverging step
point/
Converging
General output
Step point transfer
Yes
Yes
Yes
Yes
No
No
step point
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:
Instruction code: Explanation:
STL Sn MPS/MRD/MPP instruction
LD X0
LD X0
Sn
MPS
cannot be used directly on
X0 X1
MPS
S
Y1
the new bus. You have to
AND X1
X2
BUS MRD
M0 OUT Y1 execute LD or LDI
X3
MRD
instruction first before
MPP
Y2 AND X2 applying MPS/MRD/MPP.
OUT M0
MPP
AND X3
OUT Y2
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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