14 Diagnostics
14.1 Preliminary Checks
215
FX
3U
-CAN User's Manual
11
PL
C
RU
N/
S
T
OP
12
C
ommuni
cati
on
S
ettings
Procedure
13
Program
Ex
ampl
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14
D
iagnos
tics
14. Diagnostics
14.1
Preliminary Checks
Check the RUN, FROM/TO, Tx/Rx, ERROR and POWER LED status.
1. RUN LED
*1.
RUN LED has three kinds of flicker states: single flash, blinking, and flickering. This LED flickers as
follows.
STARTUP AND MAINTENANCE
PRECAUTIONS
•
Do not touch any terminal while the PLC's power is on.
Doing so may cause electric shock or malfunctions.
•
Before cleaning or retightening terminals, cut off all phases of the power supply externally.
Failure to do so may cause electric shock.
•
Before modifying or disrupting the program in operation or running the PLC, carefully read through this manual and the associated
manuals and ensure the safety of the operation.
An operation error may damage the machinery or cause accidents.
STARTUP AND MAINTENANCE
PRECAUTIONS
•
Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
•
Turn off the power to the PLC before connecting or disconnecting any extension cable.
Failure to do so may cause equipment failures or malfunctions.
•
Do not drop the product or exert strong impact to it.
Doing so may cause damage.
•
Turn off the power to the PLC before attaching or detaching the following devices.
Failure to do so may cause equipment failures or malfunctions.
-
Peripheral devices, display module, expansion boards, and special adapters
-
Input/output extension units/blocks, FX Series terminal blocks and special function units/blocks
-
Battery and memory cassette
LED State
Description
OFF
FX
3U
-CAN is in Layer 2 offline mode.
SINGLE FLASH
*1
FX
3U
-CAN is in CANopen
®
STOPPED state.
Periodically turns ON for 100 ms, and OFF for 1 s.
BLINKING
*1
FX
3U
-CAN is in CANopen
®
PRE-OPERATIONAL state.
Turns ON/OFF in 200 ms intervals.
FLICKERING
*1
LSS Services in progress
Turns ON/OFF in 50 ms intervals.
ON
•
CANopen
®
mode: CANopen
®
OPERATIONAL state
•
Layer 2 mode:
Layer 2 online mode
FLICKERING
0.05 s 0.05 s
0.2 s
BLINKING
0.2 s
SINGLE FLASH
0.2 s
1 s
Summary of Contents for FX3U-CAN
Page 1: ...FX3U CAN USER S MANUAL ...
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Page 6: ...Safety Precautions Read these precautions before use 4 MEMO ...
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