YASKAWA VS MINI J7 Manuel d'utilisateur Page 139
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125
Troubleshooting Chapter 8-2
8-2-4 Motor Outputs No Torque or Acceleration is Slow
The stall prevention level
during running is too low.
If the value in n57 for stall prevention level during operation is too low, the
speed will drop before torque output is turned ON.
Check to be sure that the set value is suitable.
The stall prevention level
during acceleration is too
low.
If the value in n56 for stall prevention level during acceleration is too slow,
the acceleration time will be too long.
Check to be sure that the set value is suitable.
8-2-5 Motor Deceleration is Slow
The deceleration time
setting is too long.
Check the deceleration time settings in n17 and n19.
Stall Prevention during
Deceleration
The Inverter incorporates a stall prevention function that will automatically
prolong the period of deceleration if the motor has an excessive amount of
regenerative energy. This function will operate if the period of deceleration
is longer than the set value. If the period of deceleration needs to coincide
with the set value, use an Inverter model with a larger capacity or a model
incorporating a function to process regenerative energy (such as the
VARISPEED V7 or 3G3EV-series Inverter).
8-2-6 Motor Burns
The load is too big. If the load of the motor is too big and the motor is used with the effective
torque exceeding the rated torque of the motor, the motor will burn out. For
example, the rated torque of the motor and capacity may be limited to eight
hours of use if the inscription on the motor states that the motor is rated for
eight hours. If the 8-hour rated torque is used for normal operation, it may
cause the motor to bun out.
Reduce the load amount by either reducing the load or lengthening the
acceleration/deceleration time. Also consider increasing the motor capa-
city.
The ambient temperature
is too high.
The rating of the motor is determined within a particular ambient operating
temperature range. The motor will burn out if it runs continuously at the
rated torque in an environment in which the maximum ambient operating
temperature is exceeded.
Lower the ambient temperature of the motor to within the acceptable
ambient operating temperature range.
The withstand voltage
between the phases of the
motor is insufficient.
When the motor is connected to the output of the Inverter, a surge will be
generated between the switching of the Inverter and the coil of the motor.
Normally, the maximum surge voltage is approximately three times the
input power supply voltage of the Inverter (i.e., approximately 600 V for
200-V models, and approximately 1,200 V for 400-V models).
Therefore, the dielectric strength of the motor to be used must be higher
than the maximum surge voltage.
- 1
- 1
- Visual Aids 3
- General Precautions 4
- Wiring Precautions 5
- Transportation Precautions 5
- Installation Precautions 5
- Warning Labels 7
- CIMR—J7AZ20P1 8
- About this Manual 9
- Application Considerations 10
- Disclaimers 11
- Table of Contents 13
- CHAPTER 1 15
- Overview 15
- 1-1 Function 16
- 1-2 Nomenclature 17
- Nomenclature Chapter 1-2 18
- Digital Operator 18
- CHAPTER 2 19
- 2-1 Installation 20
- Installation Chapter 2-1 21
- 2-2 Wiring 24
- Wiring Chapter 2-2 25
- Removing the Front Cover 25
- 2-2-2 Terminal Block 26
- Main Circuit Terminals 27
- Control Circuit Terminals 28
- Selecting Input Method 28
- 2-2-3 Standard Connections 30
- Circuit Breaker Capacities 31
- Wiring Example 1 34
- Ground Wiring 37
- Harmonics 38
- Standard Connection 43
- LVD Conformance 45
- CHAPTER 3 47
- 3-1 Nomenclature 48
- 3-2 Outline of Operation 49
- Status Monitor 51
- Example of Paramter Settings 53
- CHAPTER 4 55
- Test Run 55
- Chapter 4 56
- 4-1 Procedure for Test Run 57
- 4-2 Operation Example 59
- 4-2-3 Initializing Parameters 60
- 4-2-5 No-load Operation 61
- 4-2-6 Actual Load Operation 62
- CHAPTER 5 63
- Basic Operation 63
- 5-1 Initial Settings 64
- 5-2 V/f Control 65
- V/f Control Chapter 5-2 66
- Basic Conecpt 67
- 5-9 Multi-function I/0 77
- Set Values 78
- Forward (reverse) 80
- RUN command 80
- 5-9-2 Multi-function Output 81
- 5-10 Analog Monitor Output 82
- CHAPTER 6 83
- Advanced Operation 83
- 6-3 Stall Prevention Function 87
- 6-7 Other Functions 93
- 6-7-4 Fault Retry (n48) 95
- Frequency Detection 97
- Other Functions Chapter 6-7 100
- 6-7-8 Error History (n78) 101
- CHAPTER 7 103
- Communications 103
- 7-1-1 Overview 104
- 7-1-2 External Dimensions 104
- 7-1-3 Names of Parts 105
- 7-1-4 Mouting Procedure 105
- Connector 106
- 7-2 Inverter Settings 107
- Inverter Settings Chapter 7-2 108
- Slave Address (n70) 108
- Send Wait Time Setting (n73) 109
- RTS Control Selection (n74) 109
- Communications Format 112
- Message Interval 112
- Message Data Configuration 112
- Slave Address 113
- Function Code 113
- Communications Data 113
- Error Check 114
- 7-4 DSR Message and Response 115
- Response 116
- Example of Data Read 116
- Settings and Response 117
- Example of Loop-back Test 121
- 7-5 Enter Command 122
- Converting the Register Data 123
- Bit reversed 124
- 1 is added 124
- 7-7-1 I/O Function 125
- 7-7-2 Monitor Functions 126
- Errors and Remedies 129
- 7-9 Self-diagnostic Test 130
- CHAPTER 8 131
- Fault Displays and Processing 132
- 8-2 Troubleshooting 137
- 8-2-6 Motor Burns 139
- 8-2-9 Mechanical Vibration 140
- 8-2-13 Inverter Does Not Run 141
- Daily Inspection 142
- Periodic Inspection 142
- Periodic Maintenance Parts 143
- Replacement of Cooling Fan 143
- CHAPTER 9 145
- Specifications 145
- 9-1 Inverter Specifications 146
- 9-2-1 List of Accessories 149
- 9-2-2 Adapter Panel 150
- 9-2-4 Fan Unit 151
- 9-2-5 Digital Operator 152
- 9-2-6 Digital Operator Case 153
- 9-2-8 DC Reactor 153
- 3G3IV-PEZZ08122_ 154
- Applicable Model 154
- External Dimensions (mm) 154
- 9-2-10 AC Reactor 155
- 9-3 Option Specifications 156
- External Dimensions 157
- CHAPTER 10 159
- List of Parameters 159
- List of Parameters Chapter 10 160
- CHAPTER 11 173
- Revision History 176
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