Alarm Detection; Alarm Displays And Processing - YASKAWA F7 User Manual

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Alarm Detection

Alarms are Drive protection functions that do 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 H2-03) if programmed.
When an alarm occurs, take appropriate corrective action according to the table below.
Digital
Operator Display
AEr
SI-T Station Number Setting Error
SI-T Address Err
Station number of SI-T option board was
<3021>
outside the setting range.
Option Communication Error
BUS
After initial communication is
Option Com Err
established, the connection was lost.
(Flashing)
Serial communication transmission
CALL
error. Communication has not yet been
SI-F/G ComCall
established.
(Flashing)
CE
Modbus Communications Error
MEMOBUS Com Err
Enabled when H5-05 = 1 and H5-04 = 3.
(Flashing)
SI-T Communications Cycle Setting
CyC
Error
SI-T Cycle Err
Communications cycle of SI-T option board
<3021>
was out of range.
Excessive Speed Deviation
DEV
Detected when F1-04 = 3 and A1-02 = 1 or 3.
Speed Deviation
The speed deviation is greater than the
(Flashing)
setting in F1-10 for longer than the setting
in F1-11.
DNE
Detected when a multi-function digital
Drive not Enable
input (H1-01 to H1-06) is programmed for
(Flashing)
6A: Drive enable.
The Drive does not have the enable
command when the run command is
applied. This alarm stops the motor.
Both the forward and the reverse run
EF
External Fault
commands are input simultaneously for
500ms or more. This alarm stops the motor.
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Table 6.2 Alarm Displays and Processing
Description
Diagnostics & Troubleshooting 6 - 10
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Cause
Station number setting error
Circuit of SI-T option board is
faulty.
Connection is broken, master
controller has stopped
communicating.
Connection was not made
properly, or user software was
not configured to the proper
baud rate or configuration.
Normal communication was not
possible for 2 seconds or longer
after control data was received.
Communications cycle of SI-T
option board set in the master
controller was out of range.
The load was locked.
The acceleration time and
deceleration times were too
short.
The load was too large.
The settings in F1-10 and F1-11
were not appropriate.
Enable command was lost while
Drive was running.
The Run command was applied
prior to the enable signal.
An external forward and
reverse command were input
simultaneously.
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Corrective Action
Check the station number setting.
Refer to SI-T manual for details.
Check the communications
devices and signals.
Refer to SI-T manual for details.
Check all connections, verify all
user side software configurations.
Check all connections, verify all
user side software configurations.
Check the communications
devices and signals.
Check the communication cycle
of SI-T option board set in master
controller.
Refer to SI-T manual for details.
Reduce the load.
Lengthen the acceleration and
deceleration times.
Check the mechanical system.
Check the settings in F1-10 and
F1-11.
Check the input terminal
programmed for enable
command.
Apply and maintain the enable
command before applying the run
command.
Check external sequence logic,
so only one input is received at a
time.