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Using Inverters for Elevating Machines
This section describes precautions to be observed when using the Varispeed F7 for elevating machines
such as elevators and cranes.
Brake ON/OFF Sequence
Brake ON/OFF Sequence
For the holding brake’s ON/OFF sequence, use the following Inverter output signals according to the set con-
trol method.
* 1. This example shows multi-function output terminals M1-M2 used for the holding brake ON/OFF signal.
Do not set H2-01 to 0 (During run).
* 2. This is the standard setting range for open-loop vector control. For V/f control, set to approximately the motor rated slip fre0.5 Hz.
If the set value is too low, the motor torque is insufficient and the load may slip when the brake is applied. Be sure to set L4-01 to a value larger than that
of E1-09 (Min. output frequency) and larger than that of L4-02 shown in Figure 6.80. If the set value is too large, the motor may not run smoothly when
it starts running.
* 3. The hysteresis in frequency detection 2 can be adjusted (from 0.1 to 0.5 Hz) by L4-02 (speed agree detection width). Change the setting to approxi-
mately 0.1 Hz if there are drops while stopping.
Fig 6.80
Control Method
Brake ON/OFF Signal
Brake ON/OFF Level Adjustment
Signal Name
Constant
*1
Signal Name
Constant
V/f (A1-02 = 0,
factory setting)
V/f with PG (A1-02 = 1)
Open-loop vector (A1-02 = 2)
Frequency detec-
tion 2
H2-01 = 05
Speed agree detec-
tion level
L4-01 = 1.0 to
3.0 Hz
*2
Speed agree detec-
tion width
L4-02 = 0.1 to
0.5 Hz
*3
Flux vector (A1-02 = 3)
During run 2
H2-01 = 37
Zero-speed level
(OFF timing only)
b2-01 = 0.1 to
0.5 Hz
L4-02
L4-01
OFF
ON
Frequency detection 2
Output frequency
Time
