Mitsubishi FR-S500 Instruction Manual Page 90
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- Table of contents
- TROUBLESHOOTING
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2
2
.5.2 Zero current detection
When the inverter's
output current falls to
"0", torque will not be
generated. This may
cause a gravity drop
when the inverter is
used in vertical lift
application.
ON
Start signal
OFF
Pr.50
Pr.51
detection time
OFF OFF
100ms
ON ON
Pr.51
detection time
Pr.50
"zero
current
detection
level"
Output
current 0 [A]
Zero current
detection signal
output (Y13)
To prevent this, the output current "zero" signal can be output from the inverter to
close the mechanical brake when the output current has fallen to "zero".
Parameter Name
Factory
Setting
Setting
Range
Remarks
50
Zero current detection
level
5% 0 to 200%
51
Zero current detection
time
0.5s 0.05 to 1s
Setting is enabled when Pr. 30
= "1"
POINT
If the output is lower than the Pr.50 setting for longer than the time set in Pr. 51
during inverter operation, the zero current detection (Y13) signal is output from the
inverter's open collector output terminal.
<Setting>
Parameter Description
50
Set the zero current detection level.
Set the level of zero current detection in terms of the percentage of the rated
inverter current from the output current value of 0 [A].
51
Set the zero current detection time.
Set a period of time from when the output current falls to or below the Pr. 50
setting to when the zero current detection signal (Y13) is output.
CAUTION
• If the current falls below the preset detection level but the timing condition is not
satisfied, the zero current detection signal is held on for about 100ms.
• When the terminal functions are changed using Pr. 64, Pr. 65, the other functions
may be affected. Confirm the functions of the corresponding terminals before
making settings.
• When one inverter is used to run (connect) multiple motors sequentially, the zero
current detection signal (Y13) may be output. Set 13% or more for the 0.1K, and
8% or more for the 0.2K. (If the sum of motor capacities is less than the zero
current detection level current or if the motor capacity per motor is less than the
zero current detection level current)
♦
♦♦
♦
Related parameters
♦
♦♦
♦
Assignment of Y13 signal to terminal
⇒
Pr. 64 "RUN terminal function selection", Pr. 65 "A, B, C
terminal function selection" (refer to page90)
- TRANSISTORIZED INVERTER 1
- Contents 6
- 1. WIRING 10
- .1 Japanese Version 11
- DC 0 to 5V 13
- DC 0 to 10V 13
- RS-485 Connector (*1) 13
- FR-S520- K-NA inverter 15
- Rated output current (A) 15
- Power supply capacity (kVA) 15
- AC input current (A) 15
- .3 European Version 16
- .4.1 Main circuit 18
- .4.2 Control circuit 18
- .5.2 Wiring instructions 21
- .5.3 Peripheral devices 22
- P<+>P1 27
- .5.8 Grounding precautions 28
- Is outgoing harmonic 30
- Terminal arrangement 33
- <AM> 33
- NA and Japanese version 34
- EC version 34
- .7 Input Terminals 37
- Reverse 38
- Forward 38
- Coasted to 39
- (1) Voltage input (10, 2, 5) 40
- (2) Current input (4, 5, AU) 41
- (1) Japanese version (FM) 43
- Inverter 44
- (2) NA and EC version (AM) 45
- RL, RM, RH, STR) 47
- Coasting time 49
- Communication Function) 50
- (2) RS-485 communication 51
- <Wiring methods> 52
- .10 Design Information 53
- FUNCTIONS 54
- .1 Function (Parameter) List 55
- 0 (bright) 63
- 63 (dark) 63
- .3.1 Torque boost 67
- Acceleration Deceleration 71
- Constant speed 71
- .3.7 DC injection brake 73
- .3.8 Starting frequency 74
- .3.9 Load pattern selection 75
- .3.13 Stall prevention 78
- .3.16 Frequency jump to 81
- .3.17 Speed display 82
- DisplayOperation 84
- Output signal 87
- .5.2 Zero current detection 90
- .6.1 Monitor display 91
- .6.3 Monitoring reference 93
- .7.1 Restart setting 93
- .10.1 Retry function 100
- .10.2 PWM carrier frequency 101
- .10.3 Applied motor 102
- <Setting> 103
- (1) PU operation interlock 109
- X16 Signal Operation Mode 110
- (2) PID action overview 111
- Too cold down 113
- Hot up 113
- (4) I/O signals 114
- (5) Parameter setting 114
- (6) Adjustment procedure 115
- (7) Calibration example 116
- .11.1 Slip compensation 118
- <Operating conditions> 119
- .12 Calibration Parameters 120
- The parameter 121
- (NA and EC version) 122
- .13 Clear Parameters 124
- (1) Operational functions 125
- <Computer programming> 129
- (1) Communication protocol 129
- (3) Data format 130
- (4) Data definitions 131
- Instruction 133
- [Example 1] H02 ... Forward 135
- [Example 2] H00 ... Stop 135
- [For example 1] 136
- <Error Code List> 137
- (6) Communication error 138
- (7) Program example 138
- PROM write selection 141
- .15.2 Buzzer sound control 142
- .15.3 PU contrast adjustment 143
- PROTECTIVE 145
- FUNCTIONS 145
- .1 Errors (Alarms) 146
- (2) Minor failures 150
- (3) Warnings 151
- (4) Write errors 152
- (Only when FR-PU04 is used) 154
- .1.4 Resetting the inverter 154
- .2 Troubleshooting 155
- .3.2 Check items 158
- .3.3 Periodic inspection 158
- .3.5 Pressure test 159
- <Preparation> 162
- <Checking method> 162
- .3.7 Replacement of parts 163
- AIR FLOW 164
- (2) Smoothing capacitors 165
- (3) Relays 165
- :Moving-iron type 166
- :Electrodynamometer type 166
- :Moving-coil type 166
- :Rectifier type 166
- 4. SPECIFI 169
- .1 Specification List 170
- (2) 3-phase 400V power supply 171
- .1.2 Common specifications 174
- .2 Outline Drawings 176
- Rating plate 177
- Parameter unit (FR-PU04) 178
- INSTRUCTIONS 179
- .1 Selecting Instructions 180
- .3 Operating Instructions 182
- (3) Installation 183
- (4) Setting 183
- (5) Power supply 183
- APPENDIX 185
- REVISIONS 191
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