User manual

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• For bit operations, such as setting, resetting, shifting, or rotating
Use the M, K, and R area. You cannot perform bit operations in the
W area.
• When you want to refer to or modify the set value of the timer or
counter.
Refer to or modify W2048 to W2303 or SV0 to SV255.
• When you want to refer to or modify the present value of the
timer or counter.
Refer to or modify the address area from W2304 to W2559 or from
PV0 to PV255. The value holds true in STOP (PROG.) state in this
area.
The present value (PV) of the counter is maintained even after the
power is off.
Processor Operation Mode
What is the Processor operation mode?
The processor has an external RUN/REMOTE/PROG switch. The PLC
performs a system check that determines the position of the switch.
The switch position determines which operating mode the PLC is in.
It can set to RUN, STOP, REMOTE, or ERROR mode.
The PLC reads the external contact signals in Run mode and executes
the user program stored in RAM. The external outputs are updated
every scan according to program results.
The user program is stopped and the external outputs are turned Off.
In the Stop mode, you may correct, delete or transfer the
program.(This is the only mode in which you can save a program in
flash memory.)
A user program is operated at every scan and the I/O and result value
is maintained. This mode is used when checking and debugging a
program at every scan. This mode is similar to the Stop mode, but it
does not initialize data.
It occurs when the CPU module finds internal defects after running the
self-diagnoses. Functions are not executed normally in this mode.
When an error occurs, the CPU stops all programs and turns all output
off. When an Error mode occurs, the user should check the error code
and take appropriate measures. Then turn the power on or put the
mode conversion switch in Prog and press the Initialize Key to clear the
error.
RUN Mode
(operating)
STOP Mode
PAUSE Mode
ERROR Mode