Over-Torque Signal - Hitachi SJ300 Series Instruction Manual

4–50
Using Intelligent Output Terminals
Over-torque
Signal
The Over-torque function [OTQ] turns ON when the estimated value of output torque of motor
increases more than the arbitrary level set for the output. Recall that the torque limit function,
covered in "Torque Limit" on page
conditions. Instead, the over-torque output feature only monitors the torque, turning ON output
[OTQ] if the torque is above programmable thresholds you set. The [OTQ] function is valid
only for sensorless vector control, 0-Hz domain sensorless vector control, or vector control
with sensor. Do not use the [OTQ] output, except for these inverter operational modes.
Code
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
C021 Intelligent output terminal [11] to [15] function
to
C025
The assignment of the Over-torque function to an output terminal [OTQ] is detailed in the
following table.
Opt.
Symbol Function Name
Code
07 OTQ Over-torque
11, 12, 13, 14, 15,
Valid for
AL0 – AL2
outputs:
C055, C056, C057, C058
Required
A044 = 03 or 04 or 05
settings:
Notes:
• This output is valid only for sensorless
vector control, 0-Hz domain sensorless vector
control, or vector control with sensor
4–37, actually limits the torque during certain operating
Function/Description
Output
State
ON when estimated torque exceeds the level
set in C055 to C058
OFF when estimated torque is below the levels
set in C055 to C058
Example: (Default output configuration
shown—see page 3–53.)
Inverter output
terminal circuit
See I/O specs on page 4–9.
Data or Range
0 to 200%
0 to 200%
0 to 200%
0 to 200%
07
Description
OTQ
14 13 11
CM2
15 12
+
RY
–