125
No
Protection
message
What are
protected
Description of protection operation
18
Overspeed
protection
It starts when the motor speed exceeds the forward overspeed protection setting
(F-01) or the reverse overspeed protection setting (F-02).
19
VF66B (DC motor
drive) input
direct-current
overvoltage
(200 V class) It starts when the input direct-current voltage exceeds 400 V.
(400 V class) It starts when the input direct-current voltage exceeds 800 V.
20
VF66B (DC motor
drive) output
direct-current
overvoltage
It starts when the armature voltage command of VF66B (DC motor drive) exceeds
the forward direction output maximum voltage (E-11) or the reverse direction
output maximum voltage (E-12) for the duration of 500 ms continuously.
21
PG error
It starts when the armature voltage command exceeds the sum of the voltage
corresponding to the speed detected from PG which is attached to the motor and
the limit width of the voltage corresponding to the speed (E-13) for the duration of
100 ms continuously.
22
CPU abnormality
handling
It starts when the CPU performs an abnormal operation due to instantaneous
reduction of control power supply 5 V or other reasons.
in the last digit shows a
number to distinguish errors.
23
Charging
resistance
overheat
protection
It starts when the charging resistance overheats with a model 7r522, 7r544, or
lower.
24
Setting error
It starts when the operation started in a state where the setting of motor's ratings
or motor's constant had some abnormality.
in the last two digits show a
number to distinguish the setting abnormality factors.
*For more details, refer to "8.1.3 What Are Displayed in Case of Setting Error
(
)" in Chapter 8.
25
Speed control
error
It starts when the deviation of motor speed and the command value (speed
control input) exceeds the set value (console setting) while the speed control
error detection is enabled.
26
Startup stall
It starts when the unit cannot operate in ten seconds after an operation command
or JOG command is input.
27
Communication
timeout error
It starts when a communication error (timeout) occurs between the option and the
master while the network communication option is used.
28
Insufficient
voltage (power
failure)
It starts when the input direct-current voltage become less than or equal to the
rated motor armature voltage (A-03) during operation.
For models 3022, 3044 and higher, and the unit parallel models 15022, 18022, 40044 through 100044, the
protection displays listed below are also available in addition to the list above.
