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11 Parameter Details
Function
Accel & Decel Time
Electromagnetic contactor on the
drive output side
S-Curve Characteristics, Accel & Decel Time
Adjustment Parameter
C1-01, C1-03, C1-05, C1-07
C1-02, C1-04, C1-06, C1-08
C2-01
C2-02
C2-03
C2-04
Note:
• When decreased operation times are necessary for the application, for example with cranes and hoists, do not use S-curve characteristic
times.
• The default setting for C2-04 [S-Curve Time @ End of Decel] will be 0.00 seconds. The default setting for other S-curve characteristics
will be 0.20 seconds. Set the acceleration/deceleration times and S-curve characteristic time correctly for acceleration/deceleration start
up and end. The recommended setting of the S-curve characteristics time is 0.2 to 1.0 seconds.
• When you use the C1-11 [Accel/Decel Time Switchover Freq], you can switch the acceleration/deceleration rate automatically during
acceleration/deceleration. The default setting is disabled.
When the Output Frequency ≥ C1-11, operate at the acceleration and deceleration times set in C1-01 and C1-02
When the Output Frequency < C1-11, operate at the acceleration and deceleration times set in C1-07 and C1-08
• During low speed operation, if the Output Frequency < E1-09 [Minimum Output Frequency] in the S-Curve Time @ Start of Decel, the
drive will cancel the S-curve characteristics and will do DC Inject Braking at Stop (zero speed control).
DC Injection Braking at Stop, Zero Speed Control Function
NOTICE
If you disconnect a drive when it is controlling the motor or during DC Injection Braking (Zero speed level), a
voltage surge can trigger a fault. When you use an electromagnetic contactor between the drive and motor, set L8-07 = 1 or 2
[Output Phase Loss Protection Sel = Fault when one phase is lost, Fault when two phases are lost]. If it necessary to disconnect
the motor and drive when you stop the elevator, as in Europe, fully close the holding brake and disconnect the drive during
baseblock (i.e., while the baseblock signal is ON). This does not apply for emergency conditions.
Adjustment Parameter
b2-01
b2-02
b2-04
H2-xx = 5
538
If the acceleration and deceleration times for the drive side are set short without factoring the
mechanical operation delay time of the holding brake, the holding brake could operate late, or could
experience overcurrent at startup, brake grinding and rollback when stopping. In this case, consider
using a brake sequence. Parameters used to adjust holding brake timing are available.
Usually you must not install the electromagnetic contactor between the drive and motor. When you
must install an electromagnetic contactor to use one drive to switchover more than one motor, follow
these precautions:
• Load a sequence that opens and closes the electromagnetic contactor when both of the following
conditions are satisfied at once. Unless there is an emergency.
– The holding brake is fully closed
– The drive terminals for H2-xx = 8 or 1B [MFDO Function Selection = During Baseblock] are ON
• If the electromagnetic contactor is opened and closed during motor control or during DC Injection
Braking (or zero speed control), fault detections may occur due to the effects of the surge voltage
and the motor direct input current.
• When you install the electromagnetic contactor between the drive and the motor, set L8-07 = 1 or 2
[Output Phase Loss Protection Sel = Fault when one phase is lost or Fault when two phases are
lost].
Acceleration Time 1 to 4
Deceleration Time 1 to 4
S-Curve Time @ Start of Accel
S-Curve Time @ End of Accel
S-Curve Time @ Start of Decel
S-Curve Time @ End of Decel
Figure 11.5 S-curve Characteristics, Accel & Decel Time
DC Injection/Zero SpeedThreshold
DC Injection Braking Current
DC Inject Braking Time at Stop
Frequency Detection 2
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
Notes
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