Hitachi WJ200-001S Instruction Manual page 268

Over Torque Signal
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
Option Terminal
Code Symbol

OTQ Over torque signal
11, 12, AL0 – AL2
Valid for inputs:
=
Required settings
Notes:
 This function is effective only when the V/F
characteristic curve selection
(SLV mode)". 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.
 The example circuit for terminal [11] drives a relay
coil. Note the use of a diode to prevent the
negative-going turn-off spike generated by the coil
from damaging the inverter's output transistor.
" (OTQ)" to an intelligent output terminal.
Function Name State
ON
OFF
or , ~
 "
is set to
Description
when the estimated output torque >
when no over torque is detected
Example for terminal [11] (default output
configuration shown – see
Inverter output
terminal circuit
CM2
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration – see
Inverter logic
circuit board
AL0 AL1
Power
supply
See I/O specs on page 4-6
461
~
page 3-89):
OTQ
11
RY
page 4-51 and 3-91):
OTQ
AL2
Load