Mitsubishi MELSEC-A series - Page 198

6. BASIC INSTRUCTIONS
6 − 86
MELSEC-A
Execution (1) EI/DI instructions are not used
Conditions
(2) EI instruction is used
(3) EI/DI instructions are used
Sequence
processing
Sequence
processing
Sequence
processing
I/O refresh
END processing Wait for constant scan
I/O refresh
END processing Wait for constant scan
I/O refresh
Sequence
processing
Sequence
processing
Sequence
processing
I/O refresh
END processing Wait for constant scan
I/O refresh
END processing Wait for constant scan
I/O refresh
DI in- struction DI in- struction DI in- struction
Sequence
processing
Sequence
processing
Sequence
processing
I/O refresh
END processing Wait for constant scan
I/O refresh
END processing Wait for constant scan
I/O refresh
DI in- struction DI in- struction DI in- struction EI in- struction EI in- struction EI in- struction
*: • indicates that lin
k
processing is possible.
• There is no wait period
for constant scan when
the constant scan facility
is not specified.
• There is no I/O refresh
time in direct mode.