MITSUBISHI ELECTRIC 700 Series - Manual (Page 68)

63
Overview
3
SEQUENCE PRO
G
RAM
M
ING
Fig 3.1 Operation Processings of Built-in PLC function
Sequence program operation processing
Step 0
to
Until execution of END instruction
Power on
I/O refresh processing
Initial processing
I/O initialization
Data memory initialization
Self-diagnostic checks
END processing
Self-diagnostic checks
Updating of timer and counter present values
and on/off of their contacts