YASKAWA GA800 Series Installation Manual page 68

5 Specifications
Item
Parameter settings allow different limits in four quadrants in these control methods:
• OLV
• CLV
Torque Limits • AOLV
• AOLV/PM
• CLV/PM
• EZOLV
0.0 s to 6000.0 s
Accel/Decel Time
The drive can set four pairs of different acceleration and deceleration times.
Approximately 20%
Approximately 125% with a dynamic braking option
• Short-time average deceleration torque
Motor output 0.4/0.75 kW: over 100%
Motor output 1.5 kW: over 50%
Motor output 2.2 kW and larger: over 20%, Overexcitation Braking/High Slip Braking allow for approximately 40%
• Continuous regenerative torque: Approximately 20%. Dynamic braking option allows for approximately 125%, 10%ED, 10 s
WARNING
• a regenerative converter
• regenerative unit
Braking Torque
• braking unit
• braking resistor
• braking resistor unit.
If you set the parameter incorrectly, the drive can decelerate for too long and cause serious injury or death.
Note:
• Models 2004 to 2138 and 4002 to 4168 have a braking transistor.
• Short-time average deceleration torque refers to the torque needed to decelerate the motor (uncoupled from the load) from the rated speed to zero. Motor
characteristics can change the actual specifications.
• Motor characteristics change the continuous regenerative torque and short-time average deceleration torque for motors 2.2 kW and larger.
Select from 15 pre-defined V/f patterns, or a user-set V/f pattern.
V/f Characteristics
Torque Control, Droop Control, Speed/Torque Control Switching, Feed Forward Control, Zero Servo Function, Restart After Momentary Power Loss, Speed
Search, Overtorque/Undertorque Detection, Torque Limit, 17 Step Speed (max.), Accel/Decel Switch, S-curve Acceleration/Deceleration, 3-wire Sequence,
Auto-Tuning (Rotational and Stationary), Dwell Function, Cooling Fan ON/OFF Switch, Slip Compensation, Torque Compensation, Frequency Jump, Upper/
Main Control
Lower Limits for Frequency Reference, DC Injection Braking at Start and Stop, Overexcitation Braking, High Slip Braking, PID Control (with Sleep
Functions
Function), Energy Saving Control, MEMOBUS/Modbus Communication (RS-485 max, 115.2 kbps), Auto Restart, Application Presets, DriveWorksEZ
(customized functions), Removable Terminal Block, Online Tuning, KEB, Overexcitation Deceleration, Inertia (ASR) Tuning, Overvoltage Suppression, High
Frequency Injection
Item
Motor Protection Electronic thermal overload protection
Momentary Drive stops when the output current is more than 200% of the HD output current.
Overcurrent
Protection
Drive stops when the output current is more than these overload tolerances:
• HD: 150% of the rated output current for 60 seconds The permitted frequency of overload is one time each 10 minutes.
• ND: 110% of the rated output current for 60 seconds The permitted frequency of overload is one time each 10 minutes.
Overload Protection
Note:
• If output frequency < 6 Hz, the drive can trigger the overload protection function when the output current is in the overload tolerance range.
• Derating may be necessary for applications that start and stop frequently.
Overvoltage 200 V class: Stops when the DC bus voltage is more than approximately 410 V
Protection
400 V class: Stops when the DC bus voltage is more than approximately 820 V
200 V class: Stops when the DC bus voltage decreases to less than approximately 190 V
Undervoltage
Protection
400 V class: Stops when the DC bus voltage decreases to less than approximately 380 V
Stops when power loss is longer than 15 ms.
Continues operation if power loss is shorter than 2 s (depending on parameter settings).
Momentary Power
Note:
Loss Ride-thru
• Stop time may be shortened depending on the load and motor speed.
• Drive capacity will change the continuous operation time. A Momentary Power Loss Recovery Unit is necessary to continue operation through a 2 s
power loss on models 2004 to 2056 and 4002 to 4031.
Heatsink Overheat
Thermistor
Protection
Braking Resistor Overheat detection for braking resistor (optional ERF-type, 3% ED)
Overheat Protection
Stall prevention is available during acceleration, deceleration, and during run.
Stall Prevention
68
Set L3-04 = 0 [Stall Prevention during Decel = Disabled] when you operate the drive with:
Table 5.2 Protection Functions
Specification
Specification
YASKAWA TOEPC71061779B GA800 Drive Installation Manual