Specifications

YASKAWA Inverter Drive A1000 – Crane Software Application Manual
53
from a second motor. An external sequence that could be used to switch between motors is shown below.
A1000CraneDrive
SC
S

N
M

M
Digital
Inputs
Digital
Outputs
3
N
N
M1
M2
Motor
Output
If the Motor Switch Command is received through a digital input and the drive is stopped, then the drive will automatically
change the state of the digital output and the motor contactors will also change states. The drive will then use all the
parameters for the motor that has been selected. It takes approximately 50 ms for the motor switch to be executed, 500
ms when in closed loop control modes.
If the Motor Switch Command is received while the drive is running, a message indicating that the drive will change motor
flashes on the digital operator screen until the motor comes to a complete stop. Once the drive is stopped, it will switch
motors.
Parameters that are independent for each motor are shown in the following table.
Function Motor 1 Motor 2
Control Mode
A1-02 E3-01
V/f Characteristics
E1-04 ~ E1-13 E3-02 ~ E3-08
Motor Parameters
E2-01 through E2-09 E4-01 through E4-07
When operating motor 2 with the drive, only V/f and Open Loop Vector (OLV) control modes are possible. The following
three parameters are also enabled only when operating with motor 1.
No. Parameter Name Setting Range Default
S2-03
Run Command Delay Timer 0.00 to 10.00 s 0.00 s
S4-19
Ultra Lift 1 Torque Bias FWD 0.0 %
S4-20
Ultra Lift 1 Torque Bias REV
-50.0 to 50.0 %
0.0 %
To allow Motor Switch operation, the corresponding multi-function digital inputs and outputs must be set according to the
following tables:
H1- Setting
Name Message Description
16
Motor Switch Command Motor Changeover
Switches between motor 1 and motor 2.
Open: Motor 1 Selected
Closed: Motor 2 Selected
When no multi-function input is set to 16, the drive will always operate motor 1.
H3- Setting
Name Message Description
1C
Motor Selection Motor 2 Selected
Signals which motor has been selected
Open: Motor 2 Selected
Closed: Motor 1 Selected
7.11 External Baseblock Command
To avoid sudden slipping or dropping of the load when an external baseblock command is entered and cleared, the
function has been modified from its standard behavior. In the A1000 Crane Drive, when an external baseblock command
is received, output current is interrupted for a minimum of 0.1 seconds and the SFS output is set to zero. The brake will
be immediately applied.
When the baseblock command is cleared, a Run Command must be entered for the drive to start. No speed search will
be performed and the drive will start from 0 Hz. If the baseblock command is cleared but no Run Command is entered,
the drive will maintain baseblock.