4-2 Function Mode •The following figure shows torque limits 1 to 4 with "01" (terminal switching) selected in torque limit selection b040. They can be switched with torque limit switchings 1 and 2 allocated to multi- function inputs. (Example) When torque limit switching 1 (41) and torque limit switching 2 (42) are allocated to multi-function input terminals S7 and S8, respectively Multi-function input terminals (41) (42) OFF OFF b041 ON OFF OFF ON ON ON 4 b042 b043 b044 Functions •To use the torque limit function in a low speed range, also use the overload limit function.
Reverse Rotation Prevention Function •This function is enabled when "03" (sensorless vector control), "04" (0-Hz sensorless vector control), or "05" (sensor vector control) is selected in control method A044/A244. •Because of the Inverter's control characteristics, the Inverter may output a rotation signal in the direction opposite to that of the RUN command (e.g. in a low-speed range). If the motor's reverse rotation may cause a problem (e.g. damage to the machine driven by the motor), set reverse rotation prevention selection b046 to "enabled".
Torque LADSTOP Function •If "03" (sensorless vector control), "04" (0-Hz sensorless vector control), or "05" (sensor vector control) is selected in control method A004/A244, this function temporarily stops the frequency deceleration function (LAD) when the torque limit function is activated. 4-58 S7 S8 SC Parameter No. Function name Data Default setting Unit A044/A244 V/f characteristics selection 03: Sensorless vector 04: 0-Hz sensorless vector 05: Sensor vector (A244 is blank.) 00 b046 Reverse rotation prevention selection 00: Disabled 01: Enabled 00 Parameter No. Function name Data Default setting Unit A044/A244 V/f characteristics selection 03: Sensorless vector 04:
0-Hz sensorless vector 05: Sensor vector (A344 is blank.) 00 b040 Torque limit selection 00: Four-quadrant separate setting 01: Terminal switch 02: Analog input 03: Option 1 04: Option 2 00