EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

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F43, F44 Current Limiter (Mode selection, Level) H12 (Instantaneous Overcurrent Limiting (Mode selection)) When the output current of the inverter exceeds the level specified by the current limiter (F44), the inverter automatically manages its output frequency to prevent a stall and limits the output current. The default setting of the current limiter is 130% and 160% for VT and CT mode inverters, respectively. (Once the VT or CT mode is selected by F80, the current limit for each mode is automatically specified.) Note that for VT and CT mode inverters of 7.5 HP or below, the current limiter is initialized to 160% with F80. If overload current, 160% (or 130%) or more of the current limit level, flows instantaneously so that an output frequency decrease problem arises due to the current limiter, consider increasing the current limit level. The current limiter mode should be also selected with F43. If F43 = 1, the current limiter is enabled only during constant speed operation. If F43 = 2, it is enabled during both of acceleration and constant speed operation. Choose F43 = 1 if you need to run the inverter at full capability during acceleration and to limit the output current during constant speed operation. • Mode selection (F43) F43 selects the motor running state in which the current limiter becomes active. Data for F43 Running states that enable the current limiter During acceleration During constant speed During deceleration 0 Disable Disable Disable 1 Disable Enable Disable 2 Enable Enable Disable • Level (F44) Data setting range: 20 to 200 (%) (in ratio to the inverter rating) F44 specifies the operation level at which the output current limiter becomes activated, in ratio to the inverter rating. The inverter's rated current differs depending upon the VT or CT mode selected. • Instantaneous Overcurrent Limiting (Mode selection) (H12) H12 specifies whether the inverter invokes the current limit processing or enters the overcurrent trip when its output current exceeds the instantaneous overcurrent limiting level. Under the current limit processing, the inverter immediately turns OFF its output gates to suppress the further current increase and continues to control the output frequency. Data for H12 0 1 Enable Function Disable An overcurrent trip occurs at the instantaneous overcurrent limiting level. If any equipment or machine malfunctions when the motor torque temporarily drops during current limiting processing, it is necessary to cause an overcurrent trip (H12 = 0) and actuate a mechanical brake at the same time. • Since the current limit operation with F43 and F44 is performed by software, it may cause a delay in control. For quick response current limiting, also enable the instantaneous overcurrent limiting with H12. • If an excessive load is applied when the current limiter operation level is set extremely low, the inverter will rapidly lower its output frequency. This may cause an overvoltage trip or dangerous turnover of the motor rotation due to undershooting. Depending on the load, extremely short acceleration time may activate the current limiting to suppress the increase of the inverter output frequency, causing the system oscillation (hunting) or activating the inverter overvoltage trip (alarm 0u ). When specifying the acceleration time, therefore, take into account machinery characteristics and moment of inertia of the load. • The torque limiter and current limiter are very similar functions. If both are activated concurrently, they may conflict and cause hunting in the system. Avoid concurrent activation of these limiters. • The vector control itself contains the current control system, so it disables the current limiter specified by F43 and F44, as well as automatically disabling the instantaneous overcurrent limiting (specified by H12). Accordingly, the inverter causes an overcurrent trip when its output current exceeds the instantaneous overcurrent limiting level. 4-67
F50 to F52 Electronic Thermal Overload Protection for Braking Resistor (Discharging capability, Allowable average loss and Resistance) These function codes specify the electronic thermal overload protection feature for the braking resistor. Set the discharging capability, allowable average loss and resistance to F50, F51 and F52, respectively. These values are determined by the inverter and braking resistor models. For the discharging capability, allowable average loss and resistance, check with the manufacturer of the braking resistor and set the function codes accordingly. Depending on the thermal marginal characteristics of the braking resistor, the electronic thermal overload protection feature may act so that the inverter issues the overheat protection alarm even if the actual temperature rise is not large enough. If it happens, review the relationship between the performance index of the braking resistor and settings of related function codes. The standard models of braking resistor can output temperature detection signal for overheat. Assign an "Enable external alarm trip" terminal command THR to any of digital input terminals [X1] to [X7], [FWD] and [REV] and connect that terminal and its common terminal to braking resistor's terminals 2 and 1. Calculating the discharging capability and allowable average loss of the braking resistor and configuring the function code data When using a braking resistor, check with the resistor manufacturer about the resistor rating and then configure the related function codes. The calculation procedures for the discharging capability and allowable average loss of the braking resistor differ depending on the application of the braking load as shown below. - Applying braking load during deceleration During normal deceleration, the braking load decreases as the speed slows down. In the deceleration with constant torque, the braking load decreases in proportion to the speed. Use equations (1) and (3) given below. - Applying braking load during running at a constant speed Different from during deceleration, in applications where the braking load is externally applied during running at a constant speed, the braking load is constant. Use equations (2) and (4) given below. Braking load (kW) Braking load (kW) Time Applying braking load during deceleration Time Applying braking load during running at a constant speed • Discharging capability (F50) The discharging capability refers to kWs allowable for a single braking cycle, which is obtained based on the braking time and the motor rated capacity. Data for F50 Function 0 To be applied to the braking resistor built-in type 1 to 9000 1 to 9000 (kWs) OFF Disable the electronic thermal overload protection During deceleration: Discharging capability (kWs) = During running at a constant speed: Braking time (s) x <strong>Motor</strong> rated capacity (HP) x 0.75 2 Discharging capability (kWs) = Braking time (s) <strong>Motor</strong> rated capacity (HP) 0.75 Equation (1) Equation (2) When the F50 data is set to "0" (To be applied to the braking resistor built-in type), no specification of the discharging capability is required. 4-68
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Preface The EQ7 product is designed
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7. Operation Method Configuration (
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Wiring • If no zero-phase current
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• Do not touch the heat sink and
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Conformity with UL standards and CS
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Conformity with UL standards and CS
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1.1 Drive Models Constant Torque (C
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• Storage environment The storage
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(5) Molded case circuit breaker (MC
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• From the system's safety point
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1.3 Precautions in running inverter
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Chapter 2 Mounting and Wiring the I
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Figure 2.3 Changing the Positions o
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2.3.2 Screw specifications and reco
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Power supply voltage Single-phase/
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Before removal of clip-off sections
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2.3.4 Wiring of main circuit termin
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DC reactor terminals P1 and P (+) C
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• Fan power supply switching conn
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When connecting a PWM converter wit
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Table 2.7 lists the symbols, names
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Table 2.7 Symbols, Names and Functi
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Table 2.7 Symbols, Names and Functi
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Wiring for control circuit terminal
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2.4 Mounting and Connecting the Key
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Never connect power supply wires to
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Table 3.1 Overview of Keypad Functi
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3.3 Running Mode 3.3.1 Running or s
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Table 3.4 Items Monitored (Continue
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3.4 Programming Mode Programming mo
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Basic configuration of screens Figu
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3.4.3 Checking changed function cod
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(3) Press key to establish the desi
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Basic key operation (1) Turn the in
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Chapter 4 Function Codes / Paramete
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F codes: Fundamental Functions Code
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Code Name Data setting range F37 Lo
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Change when running Data copying De
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Change when running Data copying De
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C codes: Control Functions of Frequ
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H codes: High Performance Functions
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Code Name Data setting range H73 To
Page 86 and 87: Code Name Data setting range A18 Mo
Page 88 and 89: J codes: Application Functions 1 Co
Page 90 and 91: Change when running Data copying De
Page 92 and 93: Inverter capacity HP 0.5 Auto-resta
Page 94 and 95: Table B Motor Parameters (Continued
Page 96 and 97: Configuring a reference frequency [
Page 98 and 99: • Gain and bias If F01 = 3 (the s
Page 100 and 101: • Specifying the initial value fo
Page 102 and 103: • Pulse count factor 1 (d62), Pul
Page 104 and 105: F03 Maximum Frequency 1 F03 specifi
Page 106 and 107: In vector control, current feedback
Page 108 and 109: • Acceleration/Deceleration patte
Page 110 and 111: F10 to F12 Electronic Thermal Overl
Page 112 and 113: F14 Restart Mode after Momentary Po
Page 114 and 115: If you enable the "Restart mode aft
Page 116 and 117: • Restart mode after momentary po
Page 118 and 119: Even if selecting "Trip after decel
Page 120 and 121: It is also possible to use an exter
Page 122 and 123: The table below shows the condition
Page 124 and 125: F29 to F31 F32, F34, F35 Analog Out
Page 126 and 127: • V/f characteristics The EQ7 ser
Page 128 and 129: Related function codes Function cod
Page 130 and 131: Under vector control without/with s
Page 132 and 133: Data for H75 Target quadrants Patte
Page 134 and 135: F42 Drive Control Selection 1 H68 (
Page 138 and 139: • Allowable average loss (F51) Th
Page 140 and 141: 4.2.2 E codes (Extension Terminal F
Page 142 and 143: Terminal function assignment and da
Page 144 and 145: • When the motor speed decreases
Page 146 and 147: Example of Operation Time Scheme Al
Page 148 and 149: When the PID control is disabled: T
Page 150 and 151: Circuit Diagram and Configuration M
Page 152 and 153: Examples of Sequence Circuits 1) St
Page 154 and 155: • Enable battery operation -- BAT
Page 156 and 157: Precautions (1) The battery power s
Page 158 and 159: Function code data Active ON Active
Page 160 and 161: • Universal DO -- U-DO (Function
Page 162 and 163: • Enable input OFF -- EN OFF (Fun
Page 164 and 165: E34, E35 Overload Early Warning/Cur
Page 166 and 167: • Display coefficients for PID da
Page 168 and 169: E44 LED Monitor (Display when stopp
Page 170 and 171: E54 Frequency Detection 3 (Level) (
Page 172 and 173: E64 Saving of Digital Reference Fre
Page 174 and 175: 4.2.3 C codes (Control functions) C
Page 176 and 177: C20 Jogging Frequency H54, H55 (Acc
Page 178 and 179: 4.2.4 P codes (Motor 1 Parameters)
Page 180 and 181: P05, A19 Motor 1 / 2 (Online tuning
Page 182 and 183: P53, P54 Motor 1 (%X correction fac
Page 184 and 185: Chapter 6 Speed Reference Command C
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Analog Reference: 0 - 20mA / 4 - 20
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H30 Communications Link Function Se
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7.2 Run/Stop from External Switch /
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7.3 Run/Stop from Serial Communicat
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Chapter 8 Motor and Application Spe
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8.3 Torque Boost (F09, Default 0.1)
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When the variable torque V/f patter
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Chapter 9 Using PID Control for Con
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Feedback Signal 0 - 10V (E61 = 5) G
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Chapter 10 Troubleshooting 10.1 Pro
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Table 10.1 Abnormal States Detectab
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10.3 If Neither an Alarm Code Nor "
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Possible Causes (5) The acceleratio
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[ 6 ] The motor does not accelerate
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10.3.2 Problems with inverter setti
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[ 3 ] Overvoltage Problem The DC li
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[ 7 ] Heat sink overheat Problem Te
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[ 12 ] Fuse blown Problem The fuse
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[ 17 ] PG wire break Problem The pu
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[ 24 ] Tuning error Problem Auto-tu
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[ 28 ] Speed mismatch or excessive
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[ 36 ] Enable circuit failure Probl
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10.7 If the Inverter is Running on
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VT mode designed for variable torqu
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CT mode designed for constant torqu
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VT mode designed for variable torqu
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l Item Specifications Remarks Enabl
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Item Specifications Remarks Overcur
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11.3 External Dimensions 11.3.1 Sta
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11.3.3 DC reactor (DCR) Power suppl
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Figure A Figure B Figure C Figure D
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11.3.5 Keypad (TP-G1W-J1) Drill fou
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EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

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