Motor Overheating Protection Using Ptc Thermistor Inputs - YASKAWA varispeed G7 CIMR-G7B series Instruction Manual

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
L1-03
L1-04
L1-05
-60
6
Name
Description
Display
Alarm opera- Set H3-09 to E and select the
tion selection operation when the input motor
during motor temperature (thermistor) input
overheating exceeds the alarm detection level
(1.17 V).
0: Decelerate to stop using the
deceleration time in C1-02.
1: Coast to stop
OH3
2: Emergency stop using the
检出动作
deceleration time in C1-09.
3: Continue operation (H3 on the
Operator flashes).
Motor over- Set H3-09 to E and select the
heating opera- operation when the motor temper-
tion selection ature (thermistor) input exceeds
the operation detection level (2.34
V).
0: Decelerate to stop using the
deceleration time in C1-02.
OH4 检出动作
1: Coast to stop
2: Emergency stop using the
deceleration time in C1-09.
Motor tempera-
Set H3-09 to E and set the pri-
ture input filter
mary delay time constant for
time constant
motor temperature (thermistor)
inputs in seconds.
OH4 检出动作
Control Methods
Change
Setting Factory during
V/f
Range Setting Opera-
V/f with
tion
PG
0 to 3 3 No A A
0 to 2 1 No A A
0.00 to
0.20 s No A A
10.00
MEMO
Open Open
BUS
Flux
Loop Loop
Regis-
Vec-
Vector Vector
ter
tor
1 2
A A A 482H
A A A 483H
A A A 484H