Error Status Check - Mitsubishi FX3U-4AD User Manual

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4AD-ADP (4-channel analog Input)
3U
6.5

Error Status Check

If an error occurs in the 4AD-ADP, the corresponding bit will turn on.
Bit
b0 Channel-1 over-scale detection
b1 Channel-2 over-scale detection
b2 Channel-3 over-scale detection
b3 Channel-4 over-scale detection
b4 EEPROM error
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).
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.
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 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.
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.
Description Bit
b5
b6
b7
b8 to b15 Unused
Description
Averaging time setting error
4AD-ADP hardware error
4AD-ADP communication data error
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6 Troubleshooting
6.5 Error Status Check
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