FX3G INSTALLATION MANUAL
19
1. Operation with built-in RUN/STOP switch
Operate the RUN/STOP switch on the front panel of the main unit to
start and stop the PLC (refer to the right figure). Turn the switch to
RUN, and the PLC will start. Turn it to STOP, and the PLC will stop.
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 X007 in 14-point type main units, and X000 to X015 in
24-point type main units.
For details, refer to the HELP menu in GX Works2.
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.
For details, refer to the HELP menu in GX Works2.
3. Starting and stopping by remote control from programming
software
The programming software 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 software, see below.
n USE OF SEVERAL RUNNING/STOPPING METHODS
1. When the built-in RUN/STOP switch and the general-purpose RUN
terminal are used
(without remote running/stopping operation from the programming
software) The RUN/STOP status of the PLC is determined by the
conditions shown in the following table.
Condition of
Built-in RUN/STOP
Switch
Condition of General-Purpose
Input Terminal Specified as
RUN Terminal by Parameter
Status of PLC
RUN
OFF RUN
ON RUN
STOP
OFF STOP
ON RUN
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.)
2. 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
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 (refer to Section
14.2) 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
In Running
Status
In Stopped
Status
Forcible ON/OFF *1
Devices used in program O *1 O*1
Devices not in use X X
Change of current
values of timers,
counters, data
registers, extension
registers, extension
file registers and
file registers *4
Devices used in program O *2, *3 X *3
Devices not in use X *3 X *3
Change of settings
of timers and
counters *5
When the program memory is
the built-in EEPROM
X X
When the program memory is
in the memory cassette and
the PROTECT switch is on
– –
When the program memory is
in the memory cassette and
the PROTECT switch is off
X X
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). On the display
module, the function cannot be operated for the input relays (X).
- 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 extension registers (R) and in controlling the SET/RST circuit and
RUN/STOP switch
X000 X001 X002
0V24V
S/S
Main unit (sink input)
RUN
General-purpose input terminal
specified as RUN input by
parameter
X000 X001 X002
0V24V
S/S
Main unit (source input)
RUN
General-purpose input terminal
specified as RUN input by
parameter
X000 X001 X002
0V24V
S/S
Main unit(sink input)
RUN STOP
General-purpose input terminal
specified as RUN input by
parameter
X000 X001 X002
0V24V
S/S
Main unit(source input)
RUN
STOP
General-purpose input terminal
specified as RUN input by
parameter
To Next Page
Loading...
