Machine Protection
6-
61
Setting the Motor Overload Pre-Alarm
If the motor overload protection function is enabled (i.e., L1-01 is set to other than 0) and you set H2-01 to
H2-05 (multi-function output terminals M1-M2, P1-PC, P2-PC, P3-C3, and P4-C4 function selection) to 1F
(motor overload OL1 pre-alarm), the motor overload pre-alarm will be enabled. If the electronic thermal value
reaches minimum 90% of the overload detection level, the output terminal that has been set will be turned ON.
Motor Overheating Protection Using PTC Thermistor Inputs
Perform motor overheating protection using the thermistor temperature resistance characteristics of the PTC
(Positive Temperature Coefficient) built into the windings of each motor phase.
Related Constants
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
L1-03
Alarm opera-
tion selection
during motor
overheating
Set H3-09 to E and select the
operation when the input motor
temperature (thermistor) input
exceeds the alarm detection level
(1.17 V).
0: Decelerate to stop using the
deceleration time in C1-02.
1: Coast to stop
2: Emergency stop using the
deceleration time in C1-09.
3: Continue operation (H3 on the
Operator flashes).
0 to 3 3 No A A A A A 482H
MOL Thm
Input
L1-04
Motor over-
heating opera-
tion selection
Set H3-09 to E and select the
operation when the motor tem-
perature (thermistor) input
exceeds the operation detection
level (2.34 V).
0: Decelerate to stop using the
deceleration time in C1-02.
1: Coast to stop
2: Emergency stop using the
deceleration time in C1-09.
0 to 2 1 No A A A A A 483H
MOL Filter
Time
L1-05
Motor tempera-
ture input filter
time constant
Set H3-09 to E and set the pri-
mary delay time constant for
motor temperature (thermistor)
inputs in seconds.
0.00 to
10.00
0.20 s No A A A A A 484H
MOL Filter
Time
TOE-S616-60.1.book 61 ページ ２０１７年８月４日 金曜日 午後３時４１分
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