• The ladder is as shown below when MPS, MRD and MPP are used and when they are not used.
Ladder when MPS, MRD and MPP are used
• Be sure to match the number of MPS and MPP instructions. The following will occur if the number used is different.
If the number of MPS instructions is greater, the ladder is changed and the PLC function executes operations on the changed
If the number of MPP instructions is greater, a ladder creation failure occurs for that ladder block and the PLC function cannot
execute operations normally.
When MPP is replaced by NOP
Ladder when MPS, MRD and MPP are not used