Mitsubishi Electronics AJ65bt-r2 ユーザーズマニュアル

10 - 1

MELSEC-A

10   TROUBLESHOOTING

 10

10. TROUBLESHOOTING

The details of the errors that occurs when using the R2, and the troubleshooting
methods are explained in this chapter.

10.1 Error codes

The error codes stored in the R2 buffer memory are explained.

10.1.1 Error code storage area

When an error occurs in the R2, programmable controller CPU or master module, an
error code is stored in the error code storage area of the R2, which is classified by
function, and the ERR. LED turns ON.
Up to eight error codes that have occurred in the past are stored in order of occurrence
in the error code history (

R 2

 1A8

H

 to 1AF

H

) (The ninth and following error codes are

not stored.)
The ERR. LED is turned OFF, and the error code storage area is cleared by turning
the error reset request signal (RY(n+1)A) ON.

Address

Name

Error code storage buffer memory

R 2

 1A8

H

 to 1AF

H

Error code history

Up to eight error codes that occurred in the past
are stored in order of occurrence.

R 2

 1B0

H

General error code

The error code that occurs when the initialization
error complete signal (RXn5), EEPROM function
error complete signal (RXn8) turns ON or at the
transmission timeout is stored.

R 2

 1B1

H

Error code at
transmission

The error code that occurs when the transmission
error complete (RXn1) turns ON is stored.

R 2

 1B2

H

Error code at
reception

The error code that occurs when the reception
error read request (RXn3) turns ON is stored.

                                                    

Error state 
(RX(n+1)A)

Error reset request
            (RY(n+1)A)

Any error occurrence

POINT

If an initial data read request signal (RY(n+1)9) error occurs, the error handling will
not be carried out even if the error reset request signal (RY(n+1)A) turns ON.