Wecon LX Series - MPS, MRD and MPP Usage; Multiple Program Examples

WECON Technology Co., Ltd.
12
Without these instructions connections can only be made to the right hand side of the
last contact.
- MPS stores the connection point of the ladder circuit so that further coil branches
can recall the value later.
- MRD recalls or reads the previously stored connection point data and forces the next
contact to connect to it.
- MPP pops (recalls and removes) the stored connection point. First, it connects the
next contact, then it removes the point from the temporary storage area.
- For every MPS instruction there MUST be a corresponding MPP instruction.
- The last contact or coil circuit must connect to an MPP instruction.
- At any programming step, the number of active MPS-MPP pairs must be no greater
than 11.
MPS, MRD and MPP usage:
• When writing a program in ladder format, programming tools automatically add all
MPS, MRD and MPP instructions at the program conversion stage. If the generated
instruction program is viewed, the MPS, MRD and MPP instructions are present.
• When writing a program in instruction format, it is entirely down to the user to enter
all relevant MPS, MRD and MPP instructions as required.
Multiple program examples: