YASKAWA A1000 Technical Manual

5.2 b: Application
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual 155
Parameter Details
5
Setting 2: Run at the minimum frequency
Whenever a Run command is active and the frequency reference is smaller than the value of parameter E1-09, the drive
runs the motor at the speed set in E1-09. When the Run command is removed, the drive decelerates the motor. As soon as
the motor speed reaches the zero speed level set in b2-01, Zero Speed Control is activated for the time set in b2-04.
Figure 5.14
Figure 5.14 Run at the Minimum Frequency
Setting 3: Zero Speed Control
The drive applies Zero Speed Control whenever the frequency reference setting is below the value of parameter E1-09.
Removing the Run command when the drive is operating at or above the frequency set to E1-09 will activate Zero Speed
Control for the time set in b2-04, regardless of whether Zero Speed Control was already active.
Figure 5.15
Figure 5.15 Zero Speed Control
 b1-06: Digital Input Reading
This parameter defines how the digital inputs are read. The inputs are acted upon every 1 ms or 2 ms depending upon the
setting.
Setting 0: Read once (1 ms scan)
The state of a digital input is read once. If the state has changed, the input command is immediately processed. With this
setting the drive responds more quickly to digital inputs, but a noisy signal could cause erroneous operation.
Setting 1: Read twice (2 ms scan)
The state of a digital input is read twice. Only if the state does not change during the double reading, the input command
is processed. This reading process is slower but more resistant against noisy signals.
No. Name Setting Range Default
b1-06 Digital Input Reading 0 or 1 1
b2-01 Zero
Speed Level
Run
Command
Frequency
reference
Motor
Speed
OFF ON
Zero Speed
Control
E1-09 Min.
Frequency
b2-04
Zero Speed Time at Stop
Run at
E1-09
Run at
E1-09
b2-03
Zero Speed Time at Start
IM: Initial Excitation
PM: Zero Spd. Contr.
Zero
Speed
Control
b2-01 Zero
Speed Level
Run
Command
Frequency
reference
Motor
Speed
OFF ON
Zero Speed
Control
E1-09 Min.
Frequency
b2-04
Zero Speed Time at Stop
E1-09
b2-03
Zero Speed Time at Start
IM: Initial Excitation
PM: Zero Spd. Contr.

YASKAWA A1000 Specifications

General

Type	AC Drive
Series	A1000
Input Voltage	200-240V, 380-480V
Frequency Range	0-400 Hz
Horsepower Range	0.5 to 1000 HP
Power Range	0.4 to 630 kW
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Braking	Dynamic Braking
Communication	Modbus
Safety	Safe Torque Off (STO)
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheat
Operating Temperature	-10 to +50°C
Storage Temperature	-20 to 60°C
Humidity	5 to 95% RH (non-condensing)
Enclosure	IP20