Error Status - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -3A-ADP (2-channel Analog Input, 1-channel Analog Output)
3U
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 Series PLC
3S
Special data register
D8288
• FX /FX Series PLC
3G 3GC
Special data register
1st
D8288
• FX /FX Series PLC
3U 3UC
Special data register
1st
D8268
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.
Bit
b0 Channel-1 over-scale detection
b1 Channel-2 over-scale detection
b2 Output data setting error
b3 Unused
b4 EEPROM error
b5 Averaging time setting error
*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
The under-scale detection function is valid only for current input mode.
The FX /FX
3G
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 /FX /FX
3S 3G
M8000
Normally ON
M8002
Initial pulse
*1. "1st" for the FX
PLC User's Manual - Analog Control Edition
Stores the error status data.
2nd
D8298 Stores the error status data.
2nd 3rd 4th
D8278 D8288 D8298
→ For a detailed description of the error status, refer to Section 6.5.
Description
/FX Series PLC Ver. 2.70 or later and FX
3U 3UC
Series PLC are not supported.
3GC
/FX /FX Series PLC
3GC 3U 3UC
FNC 12
D8288
MOV
RST
RST
FNC 12
K4M0
MOV
/FX /FX PLC.
3S 3G 3GC
Description
Description
Description
Stores the error status data.
Bit
3A-ADP hardware error
b6
(Power supply error included)
b7
3A-ADP communication data error
b8 Channel-1 under-scale detection
b9 Channel-2 under-scale detection
b10 to b15 Unused
-
Series PLC.
3S
K4M0
Error status of 3rd
M6
b6 = OFF (3A-ADP hardware error)
Error status of 3rd
M7
b7 = OFF (3A-ADP communication data error)
D8288
4 Programming
4.10 Error Status
Description
*1
*2
*3
*3
-
*1
analog special adapter
*1
analog status register
A
B
C
D
E
F
G
H
I
J
H-27