7.3 Flux Vector Control
7-23
D
Settings
Setting Function
1
The speed limit is set from one of the analog frequency reference terminals (13 or 14).
2
The speed limit is set to the value in constant d5-04.
Speed Limit Selection Settings: d5-03, H3-01, d5-04
D
Limit with Analog Input (d5-03 = 1)
• The speed limit value is set by the input voltage (H3-01) to frequency reference (voltage) terminal
13.
• When frequency reference (current) terminal 14 has been set to frequency reference by setting
constant H3-09 to 1F, this terminal is also used as an input terminal for the speed limit.
In this case, the actual speed limit value is the sum of the voltage input value at terminal 13 and
the current input value at terminal 14.
• The polarity of the speed limit signal and the direction of the run command determine the direction
in which the speed is limited.
• +Voltage input: Forward rotation; Speed is limited in the forward direction.
Reverse rotation; Speed is limited in the reverse direction.
• −Voltage input: Forward rotation; Speed is limited in the reverse direction.
Reverse rotation; Speed is limited in the forward direction.
• The speed limit value is zero for rotation opposite to the speed limit direction.
For example, when a +voltage is being input and the forward rotation command is ON, the effec-
tive range of the torque control is from zero to the speed limit value in the forward direction (when
constant d5-05, the speed limit bias, is set to 0).
User
Change
Valid Access Levels
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
H3-01
Signal level selec-
tion (terminal 13)
×
0, 1 − 0
B B B B
D
Setting (See page 6 - 4.)
Setting Function
0
0 to 10 VDC input
1
−10 to 10 VDC input
(A negative voltage is a command for rotation in the opposite direction.)
D
Set the signal level to match the speed limit voltage being input.
D
Limit with Constant Setting (d5-03 = 2)
User
Change
Valid Access Levels
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting
V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
d5-04
Speed limit
×
−120 to
+120
% 0
× × ×
A
• Set the speed limit as a percentage of the maximum frequency. (The max. frequency is 100%.) The
sign of the constant setting and the direction of the run command determine the direction in which
the speed is limited.
Setting +: Forward rotation; Speed is limited in the forward direction.
Reverse rotation; Speed is limited in the reverse direction.
Setting −: Forward rotation; Speed is limited in the reverse direction.
Reverse rotation; Speed is limited in the forward direction.
• The speed limit value is zero for rotation opposite to the speed limit direction.
For example, when a positive value is set in d5-04 and the forward rotation command is ON, the
effective range of the torque control is from zero to the speed limit value in the forward direction
(when constant d5-05, the speed limit bias, is set to 0).
7