Setting The Torque Limit Level - Mitsubishi Electric 800 Series Instruction Manual

Speed control under Real sensorless vector control, vector control, PM sensorless vector
control
5.3.4

Setting the torque limit level

Limit the output torque not to exceed the specified value.
The torque limit level can be set in a range of 0 to 400%. The TL signal can be used to switch between two types of
torque limit.
The torque limit level can be selected by setting it with a parameter, or by using analog input terminals (terminals 1, 4).
Also, the torque limit levels of forward rotation (power driving/regenerative driving) and reverse rotation (power driving/
regenerative driving) can be set individually.
Pr. Name
Stall prevention
22
operation level (Torque
H500
limit level)
85 Excitation current
G201 refraction point
86 Excitation current low
G202 speed multiplying factor
157
OL signal output timer
M430
801
Output limit level
H704
Constant output range
803
torque characteristic
G210
selection
804 Torque command source
D400 selection
805 Torque command value
D401 (RAM)
806 Torque command value
D402 (RAM, EEPROM)
810 Torque limit input
H700 method selection
154
PARAMETERS
Initial Setting
value range
150/200% 0 to 400%

0 to 400 Hz
9999
9999
0 to 300%
9999
9999
0 to 25 s
0 s
9999
0 to 400%
9999
9999
0
1
0 2
10
11
0
1
3
0
4
5
6
600 to
1000%
1400%
600 to
1000%
1400%
0
0 1
2
Sensorless Sensorless Vector Sensorless Vector Vector
Description
Set the torque limit level in percentage with regards to the
rated torque as 100%.
Set a frequency of the low-speed range in the constant output
range torque characteristic selection.
10 Hz is applied.
Set a torque scaling factor applied to the operation in the low-
speed range in the constant output range torque
characteristic selection.
130% is applied.
Set the OL signal output start time at the activation of torque
limit operation.
No OL signal output
Set the torque current limit level.
The torque limit setting value is used for limiting the torque
current level.
Torque rise in low-speed
range
Constant torque in low-speed
range
The torque is kept constant in
the low-speed range. (The
torque current is limited.)
Constant torque in low-speed
range
Torque rise in low-speed
range
The internal torque limit 2 cannot be used.
Torque limit (-400% to 400%) by the parameter setting
(Pr.805 or Pr.806)
Torque limit via CC-Link communication/CC-Link IE Field
Network communication (FR-A8NC/FR-A8NCE)
The internal torque limit 2 cannot be used.
Torque limit via CC-Link communication/CC-Link IE Field
Network communication (FR-A8NC/FR-A8NCE)
Writes the torque limit value in RAM. Regards 1000% as 0%,
and set torque command by an offset of 1000%.
Writes the torque limit value in RAM and EEPROM. Regards
1000% as 0%, and set torque command by an offset of
1000%.
Internal torque limit 1 (Torque limited by parameter settings.)
External torque limit (Torque limited by terminals 1 and 4.)
Internal torque limit 2 (Torque limited by communication options)
PM PM PM
In constant-power range,
constant motor output limit
In constant-power range,
constant torque limit
The torque is limited to be
constant in the constant
power range unless the
output limit of the torque
current is reached. (The
torque current is limited.)
In constant-power range,
constant motor output limit
In constant-power range,
constant torque limit