Mitsubishi Electric FR-A700 Technical Manual page 58

(2) When using terminal 10 and 2(
Terminal 2 and terminal 10 are available for inputting of
motor built-in PTC thermistor output.
For the power supply terminal of PTC thermistor input, do
not use power supply other than terminal 10 (external
power supply, etc). PTC thermistor does not work properly.
When the PTC thermistor input reaches to the resistance
value set in [Pr. 561 PTC thermistor protection level], inverter
outputs PTC thermistor operation error signal (E.PTC) and
trips.
Check the characteristics of the using PTC thermistor, and
set the resistance value within a protection providing
temperature TN, just around the center of R1 and R2 in a
right figure. If the [Pr. 561] setting is closer to R1 or R2, the
working temperature of protection goes higher (protection
works later), or lower (protection works earlier).
PTC thermistor resistance can be displayed in operation
panel, parameter unit
communication when PTC thermistor protection is active
≠
([Pr. 561 "9999"]).
[Pr.] Name
561 PTC thermistor protection level
*1 When using terminal 2 as PTC thermistor input ([Pr. 561
Also unavailable when using terminal 2 for PID control and Dancer control. When PID control and Dancer control is not active
([Pr. 128 PID action selection = "0"]), terminal 4 functions as follows.
When [Pr. 79 = "4"] or in external operation mode......... Terminal 4 is active whether AU signal is ON/OFF
When [Pr. 79 = "3"] ........................................................ Terminal 4 is active for frequency command when AU signal is ON
)
D700
(FR-PU07), or RS-485
Initial
Value
9999
≠
Inverter
PTC thermistor input connection
Thermistor
resistance
R2
Pr. 561
R1
Temperature-resistance
existing range
TN: Rated operational temperature
PTC thermistor characteristics
Setting Range
Set the level (resistance value) for PTC
0.5 to 30kΩ
thermistor protection activates.
9999 PTC thermistor protection is inactive.
"9999"]), terminal 2 is not available for analog frequency command.
51
SPECIFICATIONS
Motor
U
V
W
10
2
Thermistor curve
Thermistor
temperature
TN-∆T TN+∆T
TN
Description
1