Mitsubishi Electric FX3S Quick Start Manual page 17

2. RUNNING AND STOPPING WITH GENERAL-PURPOSE INPUT
(RUN TERMINAL)
Operation with one switch (RUN)
One of the input terminals X000 to X017 *1 of the main unit can be
used as a RUN input terminal by a parameter setting (refer to the figure
below). When the specified input terminal is turned on, the PLC starts.
When it is turned off, the PLC is started or stopped depending on the
state of the built-in RUN/STOP switch.
*1. X000 to X005 in FX3S-10MR/ES, X000 to X007 in FX3S-14MR/ES,
and X000 to X013 in FX3S-20MR/ES.
General-purpose input terminal
RUN
specified as RUN input by parameter
S/S X000 X001 X002 • • •
Main unit (sink input)
2 4 V 0 V
Operation with two switches (RUN and STOP)
The PLC can be started and stopped with individual RUN and STOP
pushbutton switches. For this operation, a sequence program using
M8035 to M8037 is necessary.
RUN STOP General-purpose input terminal
specified as RUN input by parameter
S/S X000 X001 X002 • • •
Main unit (sink input)
2 4 V 0 V
3. Starting and stopping by remote control from programming tool
The programming tool has a function to forcibly start and stop the PLC
by remote control (remote RUN/STOP function). However, when power
is reapplied, the remote RUN/STOP function is disabled. The RUN/
STOP status is then determined by the RUN/STOP switch or RUN
terminal.
For details on the start and stop procedures with remote control from
programming tool, see below.
n USE OF SEVERAL RUNNING/STOPPING METHODS
When the built-in RUN/STOP switch and the general-purpose
RUN terminal are used (without remote running/stopping operation
from the programming tool). The RUN/STOP status of the PLC is
determined by the conditions shown in the following table.
Condition of Condition of General-Purpose
Built-in RUN/STOP Input Terminal Specified as
Switch RUN Terminal by Parameter
OFF
RUN
ON
OFF
STOP
ON
Use either built-in RUN/STOP switch or the general input specified as
RUN terminal. (When specifying the general-purpose terminal as the
RUN terminal, always set the built-in RUN/STOP switch to STOP.)
When the remote running/stopping operation from the
programming software is performed
For this operation, keep both the built-in RUN/STOP switch and the
general-purpose input RUN terminal in the STOP position. If the stop
command is given from the programming software after the PLC is
started by either the built-in RUN/STOP switch or the general-purpose
Mitsubishi Electric Automation, Inc.
General-purpose input terminal
RUN
specified as RUN input by parameter
S/S X000 X001 X002 • • •
Main unit (source input)
2 4 V 0 V
RUN STOP General-purpose input terminal
specified as RUN input by parameter
S/S X000 X001 X002 • • •
Main unit (source input)
2 4 V 0 V
Status of PLC
RUN
RUN
STOP
RUN
input RUN terminal, the PLC will be restored to the running status by
giving the RUN command from the programming software. This can
also be accomplished by setting the built-in RUN/STOP switch or the
general-purpose input RUN terminal to STOP and then to RUN.
n OPERATION AND TEST [POWER ON AND PLC RUNNING]
SELF-DIAGNOSTIC FUNCTION
When the PLC's power is turned on, its self-diagnostic function starts
automatically. If there are no problems with the hardware, parameters
or program, the PLC will start and the RUN command is given (RUN
LED is lit). If any problems are found, the "ERR" LED flashes or lights.
TEST FUNCTIONS
Functions of the programming tool to turn on/off the PLC devices
and change the current values/settings are effective or ineffective
depending on the PLC status as shown below.
X: Effective O: Conditionally Effective – : Ineffective
Item
Devices used in program
Forcible ON/OFF *1
Devices not in use
Change of current
Devices used in program
values of timers,
counters, data
registers, and file
Devices not in use
registers *3
When the program memory is
the built-in EEPROM
When the program memory is
Change of settings
in the memory cassette and
of timers and
the PROTECT switch is on
counters *4
When the program memory is
in the memory cassette and
the PROTECT switch is off
1. Forcible ON/OFF
The forcible ON/OFF function is effective on the input relays (X), output relays
„ „
(Y), auxiliary relays (M), state (S), timers (T) and counters (C).
The forcible ON/OFF function can turn on or off the devices only for one scan.
„ „
While the PLC is running, the function is substantially effective in clearing the
current values of the timers (T), counters (C), data registers (D), index registers
(Z and V) and in controlling the SET/RST circuit and self-retaining circuit. (The
operation to forcibly turn on timers is effective only when the timers are driven by
the program.)
The results of forcible ON/OFF operation performed while the PLC in the
„ „
stopped state or performed for devices not used in the program are retained.
However, the results of the operation performed for the input relays (X) are not
retained because the relays refresh input even while the PLC is in the stopped
state. (They are updated according to the input terminal conditions.)
2. Since the current values may be changed according to MOV instruction in the
program and the operation results, the most recently obtained values are retained.
3. The current values of the file registers stored in the program memory cannot be
monitored or tested on the display module.
4. Change of timer and counter settings. The settings of the timers (T) and counters
(C) can be changed only when the timers are driven by the program.
FX3S QUICK START MANUAL
In Running In Stopped
Status Status
O *1 X *1
X X
O *2 X
X X
X X
– –
X X
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