Over-Torque Signal (Otq) (A044, C021 To C025, C055 To C058) - Hitachi L700 SERIES Instruction Manual

4.2.64 Over-torque signal (OTQ)
The inverter outputs the over-torque signal when it detects
that the estimated motor output torque exceeds the
specified level.
To enable this function, assign function "07" (OTQ:
over-torque signal) to an intelligent output terminal.
This function is effective only when the V/F characteristic curve selection selected with function "A044" or
"A244" is the sensorless vector control. With any other V/F characteristic curve selection, the output of the
OTQ signal is unpredictable.
When using the inverter for a lift, use the OTQ signal as the trigger to stop braking. Use the
frequency-arrival signal as the trigger to start braking.
Item
Terminal function
Alarm relay terminal function
Over-torque (forward-driving) level
setting
Over-torque (reverse
regenerating) level setting
Over-torque (reverse driving) level
setting
Over-torque (forward
regenerating) level setting
Function code Set value
C021 to C025
C026
C055 0. to 150. (%)
C056 0. to 150. (%)
C057 0. to 150. (%)
C058 0. to 150. (%)
4 - 67
Chapter 4 Explanation of Functions
Related code
A044/A244/A344: V/F characteristic curve selection,
1st/2nd/3rd motors
C021 to C025: Terminal [11] to [15] functions
C055: Over-torque (forward-driving) level setting
C056: Over-torque (reverse regenerating) level setting
C057: Over-torque (reverse driving) level setting
C058: Over-torque (forward regenerating) level setting
07 OTQ: Over-torque signal
Threshold level to output the OTQ signal
during forward powering operation
Threshold level to output the OTQ signal
during reverse regeneration operation
Threshold level to output the OTQ signal
during reverse powering operation
Threshold level to output the OTQ signal
during forward regeneration operation
Description