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MDS-D2/DH2 Series Instruction Manual
7.2 Protective Functions List of Units
(Note 1) Definitions of terms in the table are as follows.
Main side encoder: Encoder connected to CN2 Sub side encoder: Encoder connected to CN3
(Note 2) Resetting methods
NR: Reset with the NC RESET button. This alarm can also be reset with the PR and AR resetting conditions.
PR: Reset by turning the NC power ON again. This alarm can also be reset with the AR resetting conditions.
When the control axis is removed, this alarm can be reset with the NC RESET button. (Excluding alarms 32 and 37.)
AR: Reset by turning the servo drive unit power ON again.
No. Name Details
Reset
method
Servo
stop method
Spindle
stop method
32
Power module error
(overcurrent)
The power module detected the overcurrent. PR Dynamic stop Coast to a stop
33
Overvoltage The bus voltage in main circuit exceeded the allowable value. PR Dynamic stop Coast to a stop
34
NC communication: CRC error The data received from the NC was outside the setting range. PR Deceleration stop Deceleration stop
35 NC command error
The travel command data received from the NC was
excessive.
PR Deceleration stop Deceleration stop
36
NC communication:
Communication error
The communication with the NC was interrupted. PR Deceleration stop Deceleration stop
37 Initial parameter error
An incorrect set value was detected among the parameters
send from the NC at the power ON.
In the SLS(Safely Limited Speed) function, an error was
detected in the relation between the safety speed and safety
rotation number in the speed observation mode.
PR Initial error Initial error
38
NC communication: Protocol
error 1
An error was detected in the communication frames received
from the NC.
Or, removing an axis or changing an axis was performed in the
synchronous control.
PR Deceleration stop Deceleration stop
39
NC communication: Protocol
error 2
An error was detected in the axis data received from the NC.
Or, in changing an axis, the parameter setting of the
synchronous control was applied when the axis was installed.
PR Deceleration stop Deceleration stop
3A Overcurrent Excessive motor drive current was detected. PR Dynamic stop Coast to a stop
3B Power module error (overheat) The power module detected an overheat. PR Dynamic stop Coast to a stop
3C Regeneration circuit error
An error was detected in the regenerative transistor or in the
regenerative resistor.
PR Dynamic stop -
3D
Power supply voltage error at
acceleration/deceleration
A motor control error during acceleration/deceleration, due to
a power voltage failure, was detected.
PR Dynamic stop -
3E
Magnetic pole position detection
error
The magnetic pole position, detected in the magnetic pole
position detection control, is not correctly detected.
AR Dynamic stop Coast to a stop
41 Feedback error 3
Either a missed feedback pulse in the motor side encoder or
an error in the Z-phase was detected in the full closed loop
system.
PR Dynamic stop Coast to a stop
42 Feedback error 1
Either a missed feedback pulse in the position detection or an
error in the Z-phase was detected. Or the distance-coded
reference check error exceeded the allowable value when the
distance-coded reference scale was used.
PR Dynamic stop Coast to a stop
43 Feedback error 2
An excessive difference in feedback was detected between
the machine side encoder and the motor side encoder.
PR Dynamic stop Coast to a stop
45 Fan stop
An overheat of the power module was detected during the
cooling fan stopping.
PR Dynamic stop Coast to a stop
46 Motor overheat / Thermal error
Either the motor or the motor side encoder detected an
overheat.
Or, the thermistor signal receiving circuit of the linear motor or
direct-drive motor was disconnected.
Or, the thermistor signal receiving circuit was short-circuited.
NR Deceleration stop Deceleration stop
48 Main side encoder: Error 5
An error was detected by the encoder connected to the main side.
The error details are different according to the connected encoder. Refer
to "Encoder alarm".
Dynamic stop Coast to a stop
49 Main side encoder: Error 6
4A Main side encoder: Error 7
4B Main side encoder: Error 8
4C
Current error at initial magnetic
pole estimate
Current detection failed at the initial magnetic pole estimation. NR Dynamic stop Coast to a stop
4D Dual signal error An error was detected in the signal related to the dual signal. NR Dynamic stop Coast to a stop
4E NC command mode error An error was detected in the control mode send from the NC. NR Deceleration stop Deceleration stop
4F Instantaneous power interrupt
The control power supply has been shut down for 50ms or
more.
NR Deceleration stop Deceleration stop
50 Overload 1
Overload detection level became 100% or more. The motor or
the drive unit is overloaded.
NR Deceleration stop Deceleration stop
51 Overload 2
In a servo system, current command of 95% or more of the
unit’s max. current was given continuously for 1 second or
longer. In a spindle system, current command of 95% or more
of the motor’s max. current was given continuously for 1
second or longer.
NR Deceleration stop Deceleration stop
52 Excessive error 1 A position tracking error during servo ON was excessive. NR Deceleration stop Deceleration stop
53 Excessive error 2 A position tracking error dur
ing servo OFF was excessive. NR Dynamic stop -