Alarm Detection - YASKAWA E7N Technical Manual

Alarm Detection

Alarms are Drive protection functions that does not operate the fault contact. The Drive will automatically return to its original
status once the cause of the alarm has been removed.
During an alarm condition, the Digital Operator display flashes and an alarm output is generated at the multi-function outputs
(H2-01 to H2-02) if programmed.
When an alarm occurs, take appropriate corrective action according to the table below.
Digital
Operator Display
Option Communication Error
BUS
After initial communication was
Option Com Err
established, the connection was lost.
Serial communication transmission error
CALL
Communication has not yet been estab-
SI-F/G ComCall
lished.
Both the forward and the reverse run com-
EF
mands are input simultaneously for 500mS
External Fault
or more. This alarm stops the motor.
EF0
Opt External Flt
Communication Option Card External Fault
(Flashing)
EF3
Ext Fault S3
External Fault at Terminal S3
(Flashing)
EF4
Ext Fault S4
External Fault at Terminal S4
(Flashing)
EF5
Ext Fault S5
External Fault at Terminal S5
(Flashing)
EF6
Ext Fault S6
External Fault at Terminal S6
(Flashing)
EF7
Ext Fault S7
External Fault at Terminal S7
(Flashing)
DNE
The Drive does not have the enable com-
Drive not Enable
mand when the run command is applied.
(Flashing)
FAN
Failure of the Drive internal cooling fan
Cooling Fan Error
when L8-32 = 0
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Table 6.4 Alarm Displays and Processing
Description
Connection is broken, master
has stopped communicating.
Connection not made properly,
user software not configured to
the proper baud rate or
configuration.
An external forward and
reverse command are input
simultaneously.
An external fault condition
exists.
An external fault condition
exists connected to a
multi-function digital input.
The Run command has been
applied prior to the enable
signal.
Drive cooling fan has stopped.
Diagnostic & Troubleshooting 6 - 13
Cause Corrective Action
Check all connections, verify all
user side software configurations.
Check all connections, verify all
user side software configurations.
Check external sequence logic.
Check for an external condition.
Verify the parameters.
Verify communication signal.
Eliminate the cause of an external
fault condition.
Remove the fault from a multi-
function digital input.
Apply the enable command
before applying the run
command.
Replace the cooling fan.