Mitsubishi FX3G-14MR/ES, Руководство по установке

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FX3G INSTALLATION MANUAL
21
the stationary current at activation. Make sure that the rush current
does not exceed the current corresponding to the maximum specified
resistance load.
LAMP LOAD
Lamp loads generally generate rush current 10 to 15 times the
stationary current. Make sure that the rush current does not exceed the
current corresponding to the maximum specified resistance load.
CAPACITIVE LOAD
Capacitive loads can generate rush current 20 to 40 times the
stationary current. Make sure that the rush current does not exceed
the current corresponding to the maximum specified resistance load.
Capacitive loads such as capacitors may be present in electronic
circuit loads including inverters.
8. TROUBLESHOOTING
n
TROUBLESHOOTING WITH LEDS
When trouble occurs, check the LEDs on the PLC to identify the
problem with the PLC.
State of
LED
State of PLC Remedies
On
Power of the specified voltage
is being correctly supplied to
the power supply terminal.
The power supply is normal.
Flashing
One of the following problems
may have occurred.
• Power of the specified
voltage and current is not
being supplied to the power
supply terminal.
• External wiring is incorrect.
• Internal error of PLC
Check the supply voltage.
• After disconnecting the cables other
than the power cable, re-apply
power to the PLC, and check
for changes in the state. If the
problem persists, consult your local
Mitsubishi Electric representative.
Off
One of the following problems
may have occurred.
• The power supply is off.
• External wiring is incorrect.
• Power of the specified
voltage is not being
supplied to the power
supply terminal.
• The power cable is broken.
• If the power is not off, check the
power supply and the power supply
route. If power is being supplied
correctly, consult your local
Mitsubishi Electric representative.
• After disconnecting the cables other
than the power cable, re-apply
power to the PLC, and check
for changes in the state. If the
problem persists, consult your local
Mitsubishi Electric representative.
n
ALM LED [ON/OFF]
This LED is valid when the optional battery is installed and the battery
mode is selected using a parameter.
State of LED State of PLC Remedies
On The battery voltage is low. Immediately replace the battery.
Off
The battery voltage is higher
than the value set with D8006. Normal
n
ERR LED [ON/FLASHING/OFF]
State of LED State of PLC Remedies
On
A watchdog timer
error may have
occurred, or the
hardware of the
PLC may be
damaged.
1. Stop the PLC, and re-apply power. If ERR
LED goes off, a watchdog timer error may
have occurred. Take any of the following
measures.
• Review the program. The maximum value
(D8012) of the scan time should not exceed
• the setting (D8000) of the watchdog timer.
• Check that the input used for input
interruption or pulse catch is not being
abnormally turned on and off in one scan.
• Check that the frequency of the pulse (duty
of 50%) input to the high-speed counter
does not exceed the specified range.
• Add the WDT instructions. Add some WDT
instructions to the program, and reset the
watchdog timer several times in one scan.
• Change the setting of the watchdog timer.
Change the watchdog timer setting (D8000)
in the program so that the setting is larger
than the maximum value of the scan time
(D8012).
2. Remove the PLC and supply power to it from
another power supply on a desk. If the ERR
LED goes off, noise may have affected the
PLC. Take the following measures.
• Check the ground wiring, and reexamine the
wiring route and installation location.
• Fit a noise filter onto the power supply line.
3. If the ERR LED does not go off even after
the measures stated in (1) and (2) are
taken, consult your local Mitsubishi Electric
representative.
Flashing
One of the
following errors
has occurred in
the PLC.
• Parameter error
• Syntax error
• Ladder error
Perform PLC diagnosis and program check with
the programming tool.
Off
No errors that
stop the PLC have
occurred.
If the operations of the PLC are abnormal,
perform PLC diagnosis and program check with
the programming tool. An I/O error, Comms error
or Runtime error may have occurred.
n
OUTPUT DOES NOT OPERATE
1. Output does not turn on.
Stop the PLC, and forcibly turn the inoperable output on then off with a
peripheral device or the display module to check its operation.
Check for troubles with external wiring.
• When the output operates
The output may be turned off unintentionally in the program.
Reexamine the program.
(Duplicate coil or RST instructions)
• When the output does not operate
Check the configuration of the connected devices and the connection
of the extension cables. If the configuration of the external wiring and
connected devices and the connection of the extension cables are
acceptable, the output circuit may be damaged. Consult your local
Mitsubishi Electric representative.
2. Output does not turn off.
Stop the PLC, and check that the output turns off.
Check for trouble with external wiring.
• When the output turns off
The output may be turned on unintentionally in the program.
Check that there are no duplicate coils in the program.
• When the output does not turn off
The output circuit may be damaged.
Consult your local Mitsubishi Electric representative.