Mitsubishi Electric FX3G User Manual page 373

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -3A-ADP (2-channel Analog Input, 1-channel Analog Output)
3U
To solve the problem, refer to the troubleshooting method described below:
1. Over-scale detection (b0, b1)
1) Description of error
The input analog value (voltage or current value) is outside the specified range.
Voltage input mode : The input voltage value is over the specified upper limit of 10.2 V.
Current input mode : The input current value is over the specified upper limit of 20.4 mA.
2) Remedy
Check that the input analog value is within the specified range. Also check the wiring.
2. Output data setting error (b2)
1) Description of error
The specified digital value is outside the specified range.
Analog data will not be correctly output.
2) Remedy
Check that the specified digital value is within the specified range.
3. 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.
2) Remedy
Please contact your local Mitsubishi Electric representative.
4. Averaging time setting error (b5)
1) Description of error
The averaging time set for one of the channels (channels 1 to 2) is outside the specified range: 1 to 4095.
2) Remedy
Check that the averaging time is set correctly for each channel.
5. 3A-ADP hardware error (b6)
1) Description of error
The 3A-ADP is not operating properly.
2) Remedy
Check that the 3A-ADP is correctly connected to the PLC.
If the problem cannot be solved even after the above check, please contact your local Mitsubishi Electric
representative.
6. 3A-ADP communication data error (b7)
1) Description of error
A communication error is detected between the 3A-ADP and the PLC.
2) Remedy
Check that the 3A-ADP is correctly connected to the PLC.
If the problem cannot be solved even after the above check, please contact your local Mitsubishi Electric
representative.
7. Under-scale detection (b8, b9)
1) Description of error
The input analog value (current value) is below the specified lower limit.
This error is only detected for the current input mode, and indicates the input current is less than 2 mA.
2) Remedy
Check that the input analog value is within the specified range. Also check the wiring.
PLC User's Manual - Analog Control Edition 6 Troubleshooting
6.5 Error Status Check
A
B
C
D
E
F
G
H
J
H-39
I