1 - 9 1 - 9
MELSEC-Q
1 GENERAL DESCRIPTION
• Reset step (Sn
R
)
R
When the reset step is
activated, a designated
step will become inactive
Sn
• When a HOLD status becomes
unnecessary for machine control, or on
selective branching to a manual ladder
occurs after an error detection, etc., a
reset request can be designated for the
HOLD step, deactivating the step in
question.
• Types of block START steps, and their operations
1) Block START step (with END check) (Bm
)
m
Bm
• In the same manner as for a subroutine
CALL-RET, a START source block
transition will not occur until the end of
the START destination block is reached.
• Convenient for starting the same block
several times, or to use several blocks
together, etc.
• A convenient way to return to the
START source block and proceed to the
next process block when a given
process is completed in a processing
line, for example.
2) Block START step (Without END check) (Bm
)
m
Bm
aX0
(Transition condition
is satisfied.)
• Even if the START destination block is
active, a START source block transition
occurs when the transition condition
associated with the block START step is
satisfied.
At this time, the processing of the
START destination block will be
continued unchanged until the end step
is reached.
• By starting another block at a given step,
the START destination block can be
controlled independently and
asynchronously with the START source
block until processing of the current
block is completed.
To Next Page
Loading...
Need help?
General
