Error Status - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
FX -2AD-BD (2-channel Analog Input)
3G
4.6

Error Status

If an error is detected in the 2AD-BD, 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
D8268
• FX Series PLC
3G
Special data register
Board A
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 Unused
b3 Unused
b4 EEPROM error
b5 Averaging time setting error
*1. Only available for FX
The under-scale detection function is valid only for current input mode.
1. Caution regarding use of error status data
If a 2AD-BD hardware error (b6) or 2AD-BD 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:
• For FX Series PLC
3G
M8000
Normally ON
M8002
Initial pulse
PLC User's Manual - Analog Control Edition
Stores the error status data.
Board B
D8278 Stores the error status data.
→ For a detailed description of the error status, refer to Section 6.6.
Description
PLC.
3S
FNC 12
D8268
MOV
RST
RST
FNC 12
K4M0
MOV
Description
Description
Bit
b6 2AD-BD hardware error
b7 2AD-BD communication data error
b8
Channel-1 under-scale detection
b9
Channel-2 under-scale detection
b10 to b15 Unused
-
K4M0
Error status of board A
M6
b6 = OFF (2AD-BD hardware error)
Error status of board A
M7
b7 = OFF (2AD-BD communication data error)
D8268
4 Programming
4.6 Error Status
Description
*1
*1
-
D-19
A
B
C
D
E
F
G
H
I
J