TECO L510 - Page 96

4-62
08-10
PTC Motor Overheat Function
Range
【0】: Disable
【1】: Decelerate to stop
【2】: Coast to stop
【3】: Continue running, when warning level is reached.
Coast to stop, when protection level is reached.
08-11
PTC Signal Smoothing Time
Range
【0.00 ~ 10.00】Sec
08-12
PTC Detection Time Delay
Range
【1 ~ 300】Sec
08-13
PTC Protection Level
Range
【0.1 ~ 10.0】V
08-14
PTC Detection Level Reset
Range
【0.1 ~ 10.0】V
08-15
PTC Warning Level
Range
【0.1 ~ 10.0】V
 Selection for motor overheat protection:
PTC (Positive temperature coefficient) sensors are used in motor windings to provide additional motor protection
against overheating.
PTC thermistor can be connected to terminals AVI and AGND.
A voltage divider resistor R is necessary to be connected as shown below in figure (b).
1) If 08-10 =1 or 2 (Decelerate or Coast to stop on over temperature detection).
When an over temperature condition is detected when the signal connected to terminal AVI rises
above the warning detection limit set in parameter 08-15 for the delay time set in parameter 08-12, the
display will show ”OH4”( motor over heat detection). The output frequency will decelerate or coast to
stop based on setting parameter 08-10.
2) If 08-10 = 3 Continue running when warning level is reached. (08-15). Coast to stop when protection
level is reached. (08-13).
When an over temperature condition is detected when the signal connected to terminal AVI rises
above the warning detection limit set in parameter 08-15, the display will show “OH3”(motor over
heat warning level) and the motor will continue to run.
If temperature detected rises above the value set in parameter 08-13 and for the delay time specified
in 08-12, the the display will show “OH4” (motor over heat detection) and the motor will coast to stop.
3) Motor over heat detection “OH4” can be reset when the temperature detection level at terminal
AVI falls below the level set in parameter【08-14 PTC reset level】.