Mitsubishi Electronics MELSEC-F Manuel D’Utilisation
C-31
6 Troubleshooting
6.5 Error Status Check
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
FX
3U
-4AD-ADP (4-channel analog Input)
A
Comm
on I
te
te
ms
B
FX
3U
-4AD
FX
3UC
-4
A
D
C
FX
3U
-4A
D
D
-A
D
P
D
FX
3G
-2A
D
D
-BD
E
FX
3U
-4DA
F
FX
3U
-4D
A
A
-AD
P
P
G
FX
3G
-1D
A
A
-BD
H
FX
3U
-3
A-
ADP
I
FX
3U
-4
A
D
-P
T
-
A
D
P
J
FX
3U
-4A
D
D
-P
TW
-
A
A
D
P
6.5
Error Status Check
If an error occurs in the 4AD-ADP, the corresponding bit will turn on.
To solve the problem, refer to the troubleshooting method described below:
1. Over-scale detection (b0 to b3)
1) Description of error
The input analog value (voltage or current value) is outside the specified range.
The digital value is out of the range specified for the voltage input mode (0 to 4080) or outside the range
specified for the current input mode (0 to 1640).
The digital value is out of the range specified for the voltage input mode (0 to 4080) or outside the range
specified for the current input mode (0 to 1640).
2) Remedy
Check that the input analog value is within the specified range. Also check the wiring.
2. EEPROM error (b4)
1) Description of error
The adjustment data which was set in the EEPROM before delivery from our factory cannot be read out
properly or has been destroyed.
properly or has been destroyed.
2) Remedy
Please contact the nearest Mitsubishi Electric distributor office.
3. Averaging time setting error (b5)
1) Description of error
The averaging time set for one of the channels (channels 1 to 4) is outside the specified range: 1 to 4095.
2) Remedy
Check that the averaging time is set correctly for each channel.
4. 4AD-ADP hardware error (b6)
1) Description of error
The 4AD-ADP is not operating properly.
2) Remedy
Check that the 24V DC power is properly supplied to the 4AD-ADP. Also check that the 4AD-ADP is
correctly connected to the PLC.
If the problem cannot be solved even after the above check, please contact the nearest Mitsubishi
Electric distributor office.
correctly connected to the PLC.
If the problem cannot be solved even after the above check, please contact the nearest Mitsubishi
Electric distributor office.
5. 4AD-ADP communication error (b7)
1) Description of error
A communication error is detected between the 4AD-ADP and the PLC.
2) Remedy
Check that the 4AD-ADP is correctly connected to the PLC.
If the problem cannot be solved even after the above check, please contact the nearest Mitsubishi
Electric distributor office.
If the problem cannot be solved even after the above check, please contact the nearest Mitsubishi
Electric distributor office.
Bit
Description
Bit
Description
b0
Channel-1 over-scale detection
b5
Averaging time setting error
b1
Channel-2 over-scale detection
b6
4AD-ADP hardware error
(Power supply error included)
(Power supply error included)
b2
Channel-3 over-scale detection
b7
4AD-ADP communication data error
b3
Channel-4 over-scale detection
b8 to b15 Unused
b4
EEPROM error
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-