Hitachi WJ200-001L, Instruction Manual

Page: 272 / 680

4

65
Electronic Thermal Warning Signal Output
You can configure this function so that the inverter outputs a warning signal before the
electronic thermal protection operates against motor overheat. You can also set the
threshold level to output a warning signal with the electronic thermal warning level
setting (

).
To output the warning signal, assign function “

(THM)” to one of the intelligent
output terminals [11] to [12], or to the relay output terminal.
Option
Code
Terminal
Symbol
Function Name State Description

THM Thermal warning
signal output ON Accumulated thermal level exceeds the electronic
thermal warning level (

)
OFF Accumulated thermal level does not exceed the
electronic thermal warning level (

)
Valid for inputs:
11, 12, AL0
– AL2
Example for terminal [11] (default output
configuration shown
– see
page 3-89 ):
Example for terminal [AL0], [AL1], [AL2] (requires
output configuration
– see
page 4-51 and 3-91 ):
See I/O specs on
page 4-6
Required settings

Notes:

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.
RY
Inverter output
terminal circuit
CM2 11
THM
AL1
Power
supply
Load
AL0 AL2
Inverter logic
circuit board THM