Hitachi SJ Series, User Manual

Page: 298 / 786

12-11-11
Chapter 12 Inverter Functions
12.11.6 Operate by Adding Torque
Command
• We want to operate by adding torque command
temporarily at the time of lifting up/down.
• We want to start-up by raising start torque
command at the start of operation.
• The torque bias function operates by enabling
torque bias mode selection at the time of speed
control.
• The torque bias function will be enabled when the
[AA121] control method is set to the sensorless
vector control, sensorless vector control in the zero
speed area, and sensor vector control.
• The torque bias function operates in either speed
control or torque control.
• When the 068 [TBS] torque bias enable function is
set to the input terminal, the torque bias function
will be enabled, only when [TBS] is turned ON.
When it is OFF, the torque bias setting will be
disabled and the torque addition will be 0.
• In the torque bias function, switching
forward/reverse can switch the adding direction.
1. When it is per the sign [±] of [Ad-14] = 00
Regardless of the operation direction, torque will be
added to the forward direction, when the torque
bias value is (+), and to the reverse direction, when
the torque bias is (-).
2. When it is dependent on the operation direction
[Ad-14] = 01
The sign of torque bias value and the direction of
action of torque bias change based on the direction
of operation command.
Forward command: Adds torque in the same
direction as the torque bias value.
Reverse command: Adds torque in the reverse
direction as the torque bias value.
• The torque bias function increases current because
torque command is added.
• In the case of setting torque bias, values
corresponding to analog inputs are as follows.
Input to Ai1/Ai2 terminal
0 to 10 (V)/0 to 20 (mA)
corresponding value
Torque command addition 0.0 to
500.0(%)
Input to Ai3 terminal
-10 to 10 (V) corresponding value
Torque command addition -500.0 to
500.0(%)
• The setting of the ratio above can be changed by
adjusting the analog input start end function.
See "12.24.5 Adjust Analog Input".
(e.g.) In the case of setting 0.0 to 50.0% to the
torque command addition value for 0-10 (V)/0-20
(mA) input as [Ai1], set 10.0% for [Cb-04] to make it
50.0% against maximum 500.0%.
([Cb-03]=0.0,[Cb-04]=10.0,[Cb-05]=0.0,[Cb-06]=10
0.0)
Q
A
!