YASKAWA F7 User Manual page 129

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