Mitsubishi Electric FR-A800 Series Instruction Manual page 289

 Speed limit method selection (Pr.1113)
Pr.1113
Speed limit method
setting
9999 Speed limit mode 1
0 (initial
Speed limit mode 2
value)
1 Speed limit mode 3
2 Speed limit mode 4
Switching by external
10
terminals
 Control block diagram (speed limit mode 1)
Same method
as speed command input
Parameter(Pr. 808, Pr. 809)
Forward/reverse rotation
speed limit
 Using the speed command during speed control (Pr.1113 = "9999", Pr.807
= "0").
• Speed limit is set by the same method as speed setting during speed control. (Speed setting by PU (operation panel/
parameter unit), multi-speed setting, plug-in option, etc.)
• When the start signal turns ON, the limit level increases from 0 Hz to the set speed by taking the time set in Pr.7
Acceleration time. When the start signal turns OFF, the limit level at the time decreases to the operation start level of
Pr.10 DC injection brake operation frequency, by taking the time set in Pr.8 Deceleration time.
Speed
Forward rotation
Pr.7
Speed setting
value during
speed control
Reverse rotation
STF(STR) ON
NOTE
• The second and third acceleration/deceleration time can be set.
• When speed limit command exceeds Pr.1 Maximum frequency setting, the speed limit value becomes Pr.1 setting. When
speed limit command falls below Pr.2 Minimum frequency setting, the speed limit value becomes Pr.2 setting. Also, the
speed limit command is smaller than Pr. 13 Starting frequency, the speed limit value becomes 0 Hz.
• To perform speed limit by analog input, calibrate analog input terminals 1, 2 and 4. (Refer to
• To use analog inputs to perform speed limit, turn the external signals (RH, RM, RL) OFF. If any of the external signals (RH,
RM, RL) is ON, speed limit by multi-speed are enabled.
288
5. PARAMETERS
5.4 Torque control under Real sensorless vector control and Vector control
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Forward rotation speed limit
Pr.807 = "0": Speed command during speed control
Pr.807 = "1": Pr.808
Pr.807 = "2": Analog input at analog input of 0 to 10 V, or Pr.1 at analog input of -10 to 0 V
Reverse rotation speed limit
Pr.807 = "0": Speed command during speed control
Pr.807 = "1": Pr.809, or Pr.808 when Pr.809 = "9999"
Pr.807 = "2": Pr.1 at analog input of 0 to 10 V, or analog input at analog input of -10 to 0 V
Speed limit
Pr.807 = "0 or 2": Speed command during speed control
Pr.807 = "1": Pr.808
Reverse-side speed limit
Pr.809, or Pr.808 when Pr.809 = "9999"
X93 signal OFF: Speed limit mode 3,
X93 signal ON: Speed limit mode 4
Speed estimated value < speed limit value
Torque command
Pr. 807 Speed limit selection
0
1
+
2
-
Speed estimated value
The speed setting
value is the speed
limit value.
Pr.8
Time
Torque controllable
range
OFF
search engine
Speed limit value
Speed control
(proportional control)
speed limit value
Real sensorless vector control
Vector control
+
Torque control
-
Speed estimator
page 505.)
M
Encoder