Mitsubishi Electronics MELSEC-F Manuel D’Utilisation

4 Programming

FX

3G

/FX

3U

/FX

3UC

 PLC User's Manual - Analog Control Edition

FX

3G

-2AD-BD (2-channel analog Input)

Comm

on I
te

ms

FX

3U

-4AD

FX

3UC

-4

A

D

FX

3U

-4A
D

-A

D

P

FX

3G

-2A
D

-BD

FX

3U

-4DA

FX

3U

-4D
A

-AD
P

FX

3G

-1D
A

-BD

FX

3U

-3

A-

ADP

FX

3U

-4

A

D

-P

T

       
         

   -

A

D

P

FX

3U

-4A
D

-P

TW

     
        

      -
A

D

P

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:

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.

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:

D8268

D8278

Stores the error status data.

b0

Channel-1 over-scale detection

b5

Averaging time setting error

b1

Channel-2 over-scale detection

b6

2AD-BD hardware error

b2

Unused

b7

2AD-BD communication data error

b3

Unused

b8 to b15

Unused

b4

EEPROM error

-

-

M8002

Error status of 1st analog board
b6 = OFF (hardware error)

Error status of 1st analog board
b7 = OFF (communication data error)

RST

M6

RST

M7

Initial pulse

FNC 12 
  MOV

D8268

K4M0

M8000

Normally ON

D8268

K4M0

FNC 12 
  MOV