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10 Troubleshooting
10.1 Troubleshooting procedure
101
FX3U-CF-ADP User's Manual
1
Introduction
2
Specification
3
System
Configuration
4
Installation
5
Wiring
6
Functions
7
Before
Programming
8
CF-ADP Applied
Instructions
Explanation
9
Program
Examples
10
Troubleshooting
10.1 Troubleshooting procedure
10.1.1 LED status check
The table below describes details for LED statuses.
10.1.2 Troubleshooting by error code
When an error occurs, the PLC turns ON the special auxiliary relay M8329 (instruction execution abnormal
end), and aborts execution of the instruction. After that, the PLC stores error codes in the special data register
for error code storage, and turns ON the error flag.
1. Checking the error status by monitoring special data registers
Monitor the special data registers shown below to check the error code, error code details and step number
where the error has occurred.
→ For details of error codes, refer to Subsection 10.1.3.
2. Checking the error status by executing the FLSTRD instruction
Execute the FLSTRD instruction (FNC305 for the CF-ADP) to check the error code of the 5 latest errors.
→ For details of the instruction, refer to Chapter 8.
→ For details of error codes, refer to Subsection 10.1.3.
LED
display
Color Status Description Error corrective action
POWER Green
OFF
Power is not being supplied from the external
power supply (24V DC).
• Correctly connect the power cable.
• Correctly connect the wiring to the external
power supply.
• When the service power supply of the PLC
main unit is in use, make sure that the supply
capacity is not being exceeded.
ON
Power is being supplied from the external power
supply (24V DC).
The power supply is normal.
BUFFER Green
OFF Data is not stored in the internal buffer. -
ON Data is stored in the internal buffer. -
ERR. Red
OFF No errors. -
ON
CF write error, CompactFlash
TM
card error, etc.
has occurred.
An error has occurred in the CF-ADP.
Check the error code, and perform the appropriate
action according to the content of the error.
For details on error codes, refer to the following.
→ Refer to Subsection
10.1.3
FULL Red
OFF
The CompactFlash
TM
card has free space.
-
Flicker
The free space in the CompactFlash
TM
card is at
20% or less of the full capacity.
-
ON
The CompactFlash
TM
card has no free space.
The free space in the CompactFlash
TM
card is at
1% or less of the full capacity.
Delete unnecessary data, or replace the
CompactFlash
TM
card.
ACCESS Red
OFF
CompactFlash
TM
card not accessed
-
ON
CompactFlash
TM
card being accessed
-
SLOT Green
OFF
The CompactFlash
TM
card is not inserted, or the
slot is in the CompactFlash
TM
card unmounted
status.
The CompactFlash
TM
card is not inserted
Insert a CompactFlash
TM
card.
ON
The CompactFlash
TM
card is inserted, or the slot is
in the card mounted status.
-
Error code storage device Error code detail storage device
Error detected step number storage
device
ch1 ch2 ch1 ch2 ch1 ch2
D8418 D8438 D8417 D8437 D8415,D8414 D8435,D8434