• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

• If the drive detects this error, it will operate the motor as specified by the stop method set in F6-25 [MLII Watchdog Error Sel].

Code

Name

FWD/REV Run Command Input

Error

Note:

• If the drive detects EF, the motor will ramp to stop.

• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

Code

Name

EF0

Option Card External Fault

Note:

• The drive detects this error if the alarm function on the external device side is operating.

• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

• Set the stopping method for this fault in F6-03 [Comm Ext Flt Select (EF0)].

Code

Name

EF1

External Fault (Terminal DI1)

Note:

If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

Code

Name

EF2

External Fault (Terminal DI2)

Note:

If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

Code

Name

EF3

External Fault (Terminal DI3)

Note:

If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =

Alarm] will be ON.

Code

Name

EF4

External Fault (Terminal DI4)

276

Causes

The drive detected a watchdog circuit exception

while it received data from the controller.

Causes

A forward command and a reverse command were

input at the same time for longer than 0.5 s.

Causes

The communication option card received an

external fault from the controller.

Programming error occurred on the controller side.

Causes

MFDI terminal DI1 caused an external fault through

an external device.

The wiring is incorrect.

External Fault [H1-01 = 2C to 2F] is set to MFDI

terminal DI1, but the terminal is not in use.

Causes

MFDI terminal DI2 caused an external fault through

an external device.

The wiring is incorrect.

External Fault [H1-02 = 2C to 2F] is set to MFDI

terminal DI2, but the terminal is not in use.

Causes

MFDI terminal DI3 caused an external fault through

an external device.

The wiring is incorrect.

External Fault [H1-03 = 2C to 2F] is set to MFDI

terminal DI3, but the terminal is not in use.

Causes

MFDI terminal DI4 caused an external fault through

an external device.

The wiring is incorrect.

Possible Solutions

Examine the MECHATROLINK cable connection. If this error

occurs frequently, examine the wiring and decrease the effects of

electrical interference as specified by these manuals:

• MECHATROLINK-II Installation Guide (MECHATROLINK

Members Association, manual number MMATDEP011)

• MECHATROLINK-III Installation Manual

(MECHATROLINK Members Association, publication

number MMATDEP018)

Possible Solutions

Examine the forward and reverse command sequence and correct

the problem.

Possible Solutions