Operation And Precautions At Run Start Time - Panasonic FP0 User Manual

Precautions During Programming
8.5 Instruction of Leading Edge Detection Method
Precautions When Using an Instruction Which Performs Leading Edge
Detection
When RUN begins, for example when the system is powered on, the off → on change
of the execution condition (trigger) is not detected. The instruction is not executed.
Execution of the instruction will take place as explained on section 8.5.2.
When used with one of the instructions indicated in instructions below which change
the order of execution of instructions, the operation of the instruction may change
depending on input timing. Take care regarding this point.
Be careful when using leading edge detection type instructions with control instructions,
such as:
MC and MCE instructions
JP and LBL instructions
LOOP and LBL instructions
CNDE instruction
Step ladder instructions
Subroutine instructions
8.5.2

Operation and Precautions at Run Start Time

Operation of first scan after RUN begins
The leading edge detection instruction is not executed when the mode has been
switched to the RUN mode, or when the power supply is booted in the RUN mode, if
the trigger (execution condition) is already on.
RUN
(Power on)
Trigger
Operation
Not executed
If you need to execute an instruction when the trigger (execution condition) is on prior
to switching to RUN mode, use R9014 (initial pulse off relay) in your program on the
following page. (R9014 is a special internal relay which is off during the first scan and
turns on at the second scan.)
8 − 14
Executed
FP0