Omron SYSDRIVE 3G3FV User Manual page 197

Advanced Operation
The speed limit value is set by the input voltage to frequency reference (voltage) terminal 13.
When frequency reference (current) terminal 14 has been set to frequency reference by setting
parameter 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, as shown in the following table.
Signal polarity
+Voltage input g
–Voltage input g
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
parameter d5-05, the speed limit bias, is set to 0).
Parameter Display name
number
H3-01 Term 13 Signal
Note Set the signal level to match the speed limit voltage being input. (This parameter cannot be
changed during operation.)
Limit with Parameter Setting (d5-03 = 2)
Parameter Display name p y
number
d5-04 Speed Lmt Value –120 to
Note This parameter cannot be changed during operation.
Set the speed limit as a percentage of the maximum frequency. (The max. frequency is 100%.)
The sign of the parameter setting and the direction of the run command determine the direction in
which the speed is limited, as shown in the following table.
Sign of d5-04
Setting + g
Setting – g
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 parameter d5-05, the speed limit bias, is set to 0).
Run command
Forward rotation Speed is limited in the forward direction.
Reverse rotation Speed is limited in the reverse direction.
Forward rotation Speed is limited in the reverse direction.
Reverse rotation Speed is limited in the forward direction.
p y Setting g
range
0 or 1
Setting g Units Default
range
%
+120
Run command
Forward rotation Speed is limited in the forward direction.
Reverse rotation Speed is limited in the reverse direction.
Forward rotation Speed is limited in the reverse direction.
Reverse rotation Speed is limited in the forward direction.
Speed limit direction
Units Default
setting
V/f
Control
--- 0 Basic or Advanced
setting
V/f
Control
0 Not applicable.
Speed limit direction
Chapter 6
Valid access levels
V/f with Open Loop
PG Vector
Valid access levels
V/f with Open Loop
PG Vector
Flux
Vector
Flux
Vector
Advanced
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