Mitsubishi A2USCPU(S1), User Manual

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4. CPU MODULE
4.3 Function List
Various functions of the CPU modules are explained below.
(To the next page)
Function (application) Description Overview of setting and operation
Constant scan
•Program execution at constant
intervals
•Simplified positioning
• Makes the processing time for a single scan in the
sequence program constant.
• Set the processing time within the range of 10ms to
190ms by 10ms.
• Write to the special register D9020
by the sequence program
Latch (power failure compensation)
Continuous control by data
retention on power failure
• When the power supply failure of 20ms or the longer/
CPU reset/power supply off occur, data contents of the
devices for which latches have been set up in advance
are retained.
• Latch-enabled devices: L, B, T, C, D, W
• Latched data are stored in the CPU main module and
backed up by the batteries of the CPU main module.
• Latch device and latch range are
specified by setting of the
peripheral device parameters.
Auto refresh of
MELSECNET/MINI-S3
Simplification of sequence
program
• Performs I/O auto refresh communication with send/
received data area for the batch refresh of AJ71PT32-S3/
A1SJ71PT32-S3 up to 8 modules.
• Auto refresh is executed in a batch after END processing.
• The FROM/TO instruction for I/O in the sequence
program becomes unnecessary. Programming is
possible with I/O devices allocated directly by each
module.
• Performed by setting the auto
refresh parameter of a peripheral
device.
(Refer to Section 4.2.6)
Remote RUN/STOP
When performing RUN/STOP
control from outside the
programmable controller
• When a programmable controller CPU is in RUN (the
RUN/STOP key switch is set to RUN), performs the
programmable controller's STOP/RUN from outside the
programmable controller (external input, peripheral
devices, computer) with a remote control.
• When performed with the external
input (X), the parameter is set with
a peripheral device.
• When performed by a peripheral
device, perform in the
programmable controller test
operation.
• When performed via the computer
link module, perform using the
dedicated commands.
PAUSE
•When stopping operation of
CPU while retaining the output
(Y)
•When performing RUN/PAUSE
control from outside the
programmable controller
• Stops the operation processing of programmable
controller CPU while retaining the ON/OFF of all the
outputs (Y).
• When programmable controller CPU is in RUN (the RUN/
STOP key switch is set to RUN), performs the
programmable controller's STOP/RUN from outside the
programmable controller CPU (external input, peripheral
devices, computer) with a remote control.
• Performed by the peripheral
device in the programmable
controller test operation.
• When performed with the external
input (X), perform the parameter
setting with the peripheral device,
set the special relay M9040 to ON
with the sequence program, then
perform.
Status latch
Carries out operation check
and failure factor check on
each device when debugging
or a failure condition is met.
• With respect to the devices to which status latches are
set up, when the status latch conditions are met, the data
contents of the devices are stored in the extension file
register for the status latch area in the CPU main module.
(the data stored are cleared by the latch clear operation)
• The criteria for the satisfied condition can be selected
from when the SLT instruction is executed by the
sequence program or when the device value matches the
set condition.
• Using the peripheral devices, set
the device to which the status
latch is performed and the
extension file register where the
data will be stored.
• Using the peripheral devices,
monitor the status latch data.
When the operation is stopped by STOP,
all the outputs (Y) are set to OFF.