Mitsubishi Electric MELSEC-FX3S Series - Error Status

H-27
4 Programming
4.10 Error Status
FX 3S /FX 3G /FX 3GC /FX 3U /FX 3UC PLC User's Manual - Analog Control Edition
FX 3U -3A-ADP (2-channel Analog Input, 1-channel Analog Output)
A
Common Items
B
FX
3U
-4AD
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3G
-2AD-BD
E
FX
3U
-4DA
F
FX
3U
-4DA-ADP
G
FX
3G
-1DA-BD
H
FX
3U
-3A-ADP
I
FX
3U
-4AD-PT
-ADP
J
FX
3U
-4AD-PTW
-ADP
4.10 Error Status
If an error is detected in the 3A-ADP, the error status data will be stored in the corresponding special data
register.
The following table shows the special data registers that store the error status data:
•FX
3S Series PLC
•FX
3G/FX3GC Series PLC
•FX
3U/FX3UC Series PLC
Check the ON/OFF status of each bit of the error status data register to check the description of the error.
Errors are assigned to the bits as shown in the following table. Create a program to detect errors.
→ For a detailed description of the error status, refer to Section 6.5.
*1. A 3A-ADP hardware error (b6) is valid only when the use of analog input is set.
Detection of power supply error is valid only when the use of analog input channel 2 is set.
*2. A 3A-ADP communication data error (b7) is valid only when the use of analog input is set.
*3. Applicable for FX
3U/FX3UC Series PLC Ver. 2.70 or later and FX3S Series PLC.
The under-scale detection function is valid only for current input mode.
The FX
3G/FX3GC Series PLC are not supported.
1. Caution regarding use of error status data
If a 3A-ADP hardware error (b6) or 3A-ADP communication data error (b7) is detected, it is necessary to clear
the error status with a program at the next power-on of the PLC.
For this reason, be sure to create the following program:
•FX
3S/FX3G/FX3GC/FX3U/FX3UC Series PLC
*1. "1st" for the FX
3S/FX3G/FX3GC PLC.
Special data register Description
D8288 Stores the error status data.
Special data register
Description
1st 2nd
D8288 D8298 Stores the error status data.
Special data register
Description
1st 2nd 3rd 4th
D8268 D8278 D8288 D8298 Stores the error status data.
Bit Description Bit Description
b0 Channel-1 over-scale detection b6
3A-ADP hardware error
(Power supply error included)
*1
b1 Channel-2 over-scale detection b7
3A-ADP communication data error
*2
b2 Output data setting error b8
Channel-1 under-scale detection
*3
b3 Unused b9
Channel-2 under-scale detection
*3
b4 EEPROM error b10 to b15 Unused
b5 Averaging time setting error - -
M8002
Error status of 3rd
*1
analog special adapter
b6 = OFF (3A-ADP hardware error)
Error status of 3rd
*1
analog status register
b7 = OFF (3A-ADP communication data error)
RST M6
RST M7
Initial pulse
FNC 12
MOV
D8288 K4M0
M8000
Normally ON
D8288K4M0
FNC 12
MOV