Run/Stop Operation; Program Configuration - Mitsubishi Electric A800 Programming Manual

RUN/STOP operation

3.2

RUN/STOP operation

The PLC function has two operating statuses, a RUN state and a STOP state.
The following description is of operation processing of the PLC function in each state.
RUN state operation
In the RUN state, the PLC function operates a sequence program in the sequence of step 0END (FEND)
instructionstep 0 repeatedly when the SQ signal is turned ON. (P.RUN is ON)
The output suspended in the STOP state is executed according to the PLC function parameter output mode set for
STOPRUN switching (refer to
STOP state operation
In the STOP state, the PLC function stops operating a sequence program when the SQ signal is turned OFF or the
inverter is stopped remotely. (P.RUN is OFF)
The PLC function saves the output status and turns off all output points when it enters the STOP state. Data other than the
output (Y) is retained in the memory.
POINT POINT
• The PLC function performs I/O refresh processing in both RUN and STOP states. Therefore, input/output can be monitored
and tested from peripheral devices even in the STOP state.
3.3

Program configuration

Program classification
Programs that can be used in the PLC function are main sequence programs only. Microcomputer programs, interrupt
programs, and SFC programs cannot be used.
Program capacity
The program capacity is the memory capacity that stores programs and is 6k steps (24k bytes). Set the program capacity
using PLC function parameters (PLC parameters).
74
Sequence program
page 101) when the PLC function enters the RUN state.