
APPENDIX
B–62755EN/01
B. ALARM LIST
455
Message CountermeasureContents
Er–16 Differential mode command (DEFMDA) is entered when
differential speed function is disabled by parameter set-
ting (No.6500#5=1).
Check parameter setting and control input signal.
Er–17 Parameter setting (No.6511#0,1,2) for speed detector is
incorrect. (Specified speed detector is not present.)
Check parameter setting.
Er–18 Spindle orientation command of position coder type is
entered when use of position coder signal is disabled by
parameter setting( No.6501#2=0).
Check parameter setting and control input signal.
Er–19 Although the command for orienting the magnetic sensor
system was entered, another mode was issued.
Do not issue another mode while the orientation
command is executed. Before issuing another
mode, cancel the orientation command.
Er–20 Both the slave mode and the high–resolution magnetic
pulse coder were enabled.
These two settings are incompatible. Check the
parameter settings.
Er–21 The slave mode command (SLV=1) was entered under
position control (servo mode, orientation,etc.).
Enter the slave mode command in the normal op-
eration mode.
Er–22 The position control command (servo mode, orienta-
tion,etc.) was entered in the slave operation mode
(SLV=1).
Enter the position control command in the normal
operation mode.
Er–23 A slave mode command was entered when the slave
mode is disabled.
Enable the slave mode.
Er–24 To perform continuous indexing in the mode for orienting
the position coder system, incremental opera-
tion(INCMD=1) was first performed, then the absolute
position command (INCMD=0) was entered.
Check the control input signal (INCMD). To
execute the absolute position command continu-
ously, be sure to perform orientation with the abso-
lute position command first.
Contact sig-
nal of *ESP
Between ESP1 and ESP2 of spindle control printed cir-
cuit board
Contact is open : emergency stop
Contact is closed : general operation
Alarm
No.
Meaning Description Remedy
“A”
display
Program ROM abnormality
(not installed)
Detects that control program is not started (due to
program ROM not installed, etc.)
Install normal program
ROM
AL–01 Motor
overheat
Detects motor speed exceeding specified speed ex-
cessively.
Check load status.
Cool motor then reset
alarm.
AL–02 Excessive speed deviation Detects motor speed exceeding specified speed ex-
cessively.
Check load status.
Reset alarm.
AL–03 DC link section fuse blown Detects that fuse F4 in DC link section is blown
(models 30S and 40S).
Check power transistors,
and so forth.
Replace fuse.
AL–04 Input fuse blown.
Input power open phase.
Detects blown fuse (F1 to F3), open phase or mo-
mentary failure of power (models 30S and 40S).
Replace fuse.
Check open phase and
power supply regenerative
circuit operation.
AL–05 Control power supply fuse
blown
Detects that control power supply fuse AF2 or AF3
is blown (models 30S and 40S).
Check for control power
supply short circuit .
Replace fuse.
AL–07 Excessive speed Detects that motor rotation has exceeded 115% of its
rated speed.
Reset alarm.
Alarms (Serial spindle)