3. Instruction Set
3.1 Basic Instructions (without API numbers)
Instruction
Function Operand
Steps
SE
Connect NO contact in series
Connect NC contact in series
Connect NO contact in parallel
Connect NC contact in parallel
Connect a block in series
Connect a block in parallel
MPS
Start of branches. Stores current
result of program evaluation
0.74 0.68 1
MRD
Reads the stored current result
from previous MPS
0.64 0.54 1
MPP
End of branches. Pops (reads and
resets) the stored result in
0.64 0.54 1
RST Resets contacts, registers or coils
2.2 1.04 3
Interrupt program pointer
Step ladder start instruction
Step ladder return instruction
NP
Negative contact to Positive
contact
N/A 1.66 0.72 1
PN
Positive contact to Negative
contact
N/A 1.62 0.72 1
Note:
*1: Refer to section 5.1 for more information on instructions STL and RET.
*2: The execution speed is obtained by basic test programs, therefore the actual instruction
execution time could be longer due to a more complicated program, e.g. program contains multiple
interruptions or high speed input/output.