Yaskawa F7 Drive User Manual - Manual (Page 129)

Diagnostics & Troubleshooting 6 - 4
Table 6.1 Fault Displays and Processing (continued)
Digital
Operator Display
Description Cause Corrective Action
DEV
Speed Deviation
Excessive Speed Deviation
Detected when F1-04 = 0 to 2 and in Flux
Vector control method A1-02 = 3.
The speed deviation is greater than the
setting in F1-10 for a time longer than the
setting in F1-11.
The load is locked. Reduce the load.
The acceleration or
deceleration time is too short. Lengthen the acceleration time
and deceleration time.
The load is too large. Check the mechanical system.
The settings in F1-10 and
F1-11 are not appropriate for
the application.
Check the settings in F1-10 and
F1-11.
Braking mechanism is
engaged Check that the brake is released
when using brake (motor).
Encoder wiring and/or encoder
settings (F1 group) are
incorrect Check for proper encoder wiring
and verify the parameter settings
are correct.
EF0
Opt External Flt
Option Board External Fault
An external fault condition is
present.
Check for an external condition.
Verify the parameters.
Verify communication signal.
EF3
Ext Fault S3
External Fault at Terminal S3 - S8
Detected when terminals S3 - S8 (H1-01 to
H1-06) are programmed for external fault
function that stops the Drive using ramp to
stop, coast to stop, or fast stop.
An external fault condition is
present that is connected to a
multi-function digital input. Eliminate the cause of the
external fault condition.
EF4
Ext Fault S4
EF5
Ext Fault S5
EF6
Ext Fault S6
EF7
Ext Fault S7
EF8
Ext Fault S8
E5
SI-T WDT Err
<3021>
SI-T Watchdog Error
Consistency error of received control data.
Synchronization error between
master controller and Drive for
control data.
Check the communications
timing such as communications
cycle.
Refer to SI-T manual for details.
E-15
SI-F/G Com Err
SI-F/G Communication Error Detected
A communication error is detected when a run
command or frequency reference is set from
the SI-F/G Option Card (b1-01=3, b1-02=3)
and communication is lost.
Communication has been lost
to the SI-F/G option card
connected and b1-01=3 and/or
b1-02=3.
Check the communication
signals.
Check the settings of b1-01 and
b1-02.
Check the setting of F6-01.
Check the host side (master)
communication configuration.