Mitsubishi Electric 800 Series, Instruction Manual, Page: 155 / 727

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