bnp-b2365(eng)b.pdf - 第340页

6. Troubleshooting 6 - 35 Alarm No. 73 Over-regeneration The over-regeneration detection level exceeded 100%. The regenerative resistor is in the overload state. Investigation det ails In vestigation results Remedies CV …

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6. Troubleshooting
6 - 34
Alarm No.
6E
Memory error
An error was detected in the internal memory.
Investigation details Investigation results Remedies
CV CR
The alarm occurs each time READY
is turned ON.
Replace the unit. 1 Check the repeatability.
The alarm occurs occasionally. Investigate item 2.
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No abnormality is found in particular. Replace the unit. 2 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Noise, grounding)
The grounding is incomplete.
An alarm will occur easily if another
device operates.
Take remedies according to the
causes of the abnormality.
Ex. Incomplete grounding:
Additionally ground.
Noise: Noise measures for
other devices.
{ {
Alarm No.
6F
Power supply error
The power supply is not connected. An error was detected in the power supply's A/D converter.
This is detected simultaneously if another power supply alarm occurs.
Investigation details Investigation results Remedies
CV CR
"F" is flickering. An A/D converter error has occurred.
Carry out the items for alarm No. 6E.
Another alarm code is flickering. Refer to the section for each alarm.
"0" is displayed. Investigate item 2.
"F" is displayed. Investigate item 2.
"8" is displayed. Refer to the section for alarm No.68.
"b", "C", "d" is displayed. Investigate item 3.
1 Check the LED display on the power
supply unit.
Something else is displayed. Refer to t he section for alarm No.68.
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0 or 4 is set. Investigate item 3. 2 Check the rotary switch setting.
A value other than the above is set. Correctly set the rotary switch.
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There is a problem with the wiring or
shield.
Replace the cable. 3 Check the communication cable
(CN4) connected with the drive unit.
There is no problem. Replace the unit.
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(Note) Alarm 6F is detected at the same time other power supply alarms occur.
Alarm No.
71
Instantaneous power failure/ external emergency stop
An instantaneous power failure occurred.
Investigation details Investigation results Remedies
CV CR
The contactor has been turned OFF
externally.
Review the machine sequence.
When turning the contactor OFF with
external means, such as an
emergency stop button, this alarm
can be avoided by inputting NC
emergency stop at the same time.
1 Investigate the sequence to check
whether the contactor has been
turned OFF with an emergency stop
button, etc.
The contactor has not been turned
OFF.
Investigate item 2.
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The alarm occurs each time READY
is turned ON.
Investigate item 3.
The alarm occurs at a certain
operation.
Investigate item 1.
If there is no problem, carry out
investigation item 3.
2 Check the repeatability.
The alarm occurs occasionally during
operation.
Investigate item 4.
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The wiring is incorrect. Correctly connect. 3 Check whether the power input wire
and contactor are correctly wired.
There is no problem. Investigate item 4.
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An instantaneous power failure or
voltage drop occurs frequently.
Correct the power facility. 4 Check the power voltage waveform
with a synchroscope.
There is no problem. Replace the unit.
{
6. Troubleshooting
6 - 35
Alarm No.
73
Over-regeneration
The over-regeneration detection level exceeded 100%. The regenerative resistor is in the overload
state.
Investigation details Investigation results Remedies
CV CR
The regenerative load display
increases when the power is turned
ON and the motor is not rotated.
Check whether the state is affected
by power fluctuation, grounding or
noise. If there is no problem, replace
the unit.
The regenerative load display
increases each time the motor
decelerates, and the alarm occurs.
A-CR : Investigate item 2.
C1-CV : Investigate item 4.
1 Check the alarm occurrence state
and regenerative load displayed on
the NC Monitor screen while
changing the operation mode.
The regenerative load display
increases each time the motor
decelerates, but the alarm does not
occur when the operation mode is
eased.
A-CR : Investigate item 2.
C1-CV : Ease the operation mode.
{ {
The setting is incorrect. Correctly set. (Refer to the section for
alarm No. 6D.)
2 Check whether the parameter
(regenerative resistor type) of the
drive unit controlling the power
supply unit is correct.
The setting is correct. Investigate item 3.
{
The regenerative resistor is
abnormal.
Replace the regenerative resistor. 3 Check the regenerative resistor's
state.
• Is oil adhered?
• Measure the resistance value.
There is no problem. Investigate item 4.
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4 Check the alarm No. "75" items.
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Alarm No.
74
Regenerative resistor overheat
The temperature protection function in the regenerative resistor activated.
Investigation details Investigation results Remedies
CV CR
The resistor is overheated. Investigate item 2. 1 Check whether the regenerative
resistor is overheated.
The resistor is not overheated. Investigate item 3.
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Check whether over-regeneration
occurred before.
Refer to the section for alarm No.73.2 Check the alarm history.
Over-regeneration has not occurred
before.
Take measures to dissipate the
regenerative resistor's heat.
• Improve the ventilation.
• Install a fan.
{
The wire is about to break. Replace the wire.
There is no continuity at the resistor's
thermal terminal.
Replace the resistor unit.
3 Check the connections of the CN22
(B) connector pins 1 and 2.
• Check whether the pins are
short-circuited with the resistor's
thermal terminal or wire.
There is no problem. Replace the power supply unit.
{
6. Troubleshooting
6 - 36
Alarm No.
75
Overvoltage
The main circuit PN bus voltage exceeded the tolerable value.
Investigation details Investigation results Remedies
CV CR
The alarm occurs each time the
motor decelerates.
Investigate item 3. 1 Check the repeatability.
The alarm occurs occasionally. Investigate item 2.
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Auxiliary regeneration frequency over
(E8) occurs just before the
overvoltage occurs.
Limit the occurrence of the excessive
instantaneous regeneration by not
decelerating multiple axes at the
same time.
2 Check the power supply's alarm
history.
Others. Investigate item 3.
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The power capacity is insufficient. Increase the power capacity. 3 Check the power capacity.
The specified power capacity is
secured.
Investigate item 4.
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The voltage drops to 170V or less
occasionally.
Increase the power capacity.
The difference of the voltage across
wires is 10V or more.
Improve the power phase balance.
4 Measure the voltage across wires.
• Is the voltage 170V or more even
when the motor is accelerating?
The difference of the voltage across
wires is less than 10V.
Investigate item 5.
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The power voltage is distorted. Improve the source of the distortion.
Install an AC reactor.
5 Measure the power voltage with a
synchroscope, and check whether
there is any distortion.
• Are there any other devices
causing the power distortion?
The power voltage waveform is not
abnormal.
Investigate item 6.
{ {
No abnormality is found in particular. Replace the unit. 6 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Noise, grounding)
The grounding is incomplete.
An alarm will occur easily if another
device operates.
Take remedies according to the
causes of the abnormality.
Ex. Incomplete grounding:
Additionally ground.
Noise: Noise measures for
other devices.
{ {
Alarm No.
76
External emergency stop setting error
The rotary switch setting for the external emergency stop does not match the parameter setting.
Investigation details Investigation results Remedies
CV CR
1 Check the rotary switch settings and
parameter settings.
When using external emergency stop:
• Add 0040h to the normal setting for SV036 or SP041, and set the power
supply's rotary switch to "4".
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