Mitsubishi Electric MELDAS C6 Instruction Manual page 455

Alarm No.
73
74
75
76
77
7F
80
81
83
84
85
86
88
89
(Note 1) With alarm "73", to prevent immediately resumption of operation from the overregeneration state,
the alarm cannot be released unless the control power (L11,L12) continuity state has continued
for 15 minutes or more after the alarm has occurred. The alarm cannot be released even if the NC
power or control power is turned ON immediately after the alarm occurs. If the power is turned ON
immediately after the alarm occurred, wait 15 minutes or more in the continuity state, and then
turn the power ON again.
(Note 2) Immediately after alarm "75" occurs, the voltage across L+ and L- will be higher than the power
voltage, so if the alarm is reset in this state, another alarm could occur.
Wait at least five minutes before resetting alarm "75".
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7.3 Servo ⋅ Spindle Alarms
Name
Over regeneration
Regenerative
resistor overheat
Overvoltage
External emergency
stop setting error
Power module
overheat
Drive unit power
supply restart
request
Detector converting
unit 1: Connection
error
Detector converting
unit 1:
Communication
error
Detector converting
unit 1: Judgment
error
Detector converting
unit 1: CPU error
Detector converting
unit 1: Data error
Detector converting
unit 1: Magnetic pole
error
Watchdog
Detector converting
unit 2: Connection
error
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7. List of Alarms
Over-regeneration detection level became over 100%. The
regenerative resistor is overloaded.
Thermal protection function of the regenerative resistor, has started
its operation.
PN bus voltage in main circuit exceeded the allowable value.
As for the external emergency stop settings, the setting on the rotary
switch and the parameter setting are mismatched.
Thermal protection function in the power module has started its
operation.
A mismatch of program mode selection was detected. Turn the drive
unit power ON again.
A connection error was detected between the analog output linear
scale and the unit MDS-B-HR that is used in a linear servo system.
A communication error was detected between the serial output linear
scale and the unit MDS-B-HR that is used in a linear servo system.
Judgment of the linear scale analog frequency failed in the unit
MDS-B-HR that is used in a linear servo system.
A CPU error was detected in the unit MDS-B-HR that is used in a
linear servo system.
A data error was detected in the unit MDS-B-HR that is used in a
linear servo system.
An error was detected in the magnetic pole of the unit MDS-B-HR
that is used in a linear servo system.
The system does not operate correctly.
A connection error was detected between the analog output linear
scale and the unit MDS-B-HR in a servo system. In a spindle
system, the initial communication with MDS-B-PJEX failed.
IV - 39
Meaning