Omron M1 Series User Manual page 580

7 Other Functions
RUN command
FW, RV
EXT terminal input
Motor rotation speed
RS (reset) input
AL output
(Alarm signal)
If the RUN command is being input when the alarm is cleared by a reset after a trip, operation is start-
ed in accordance with the frequency reference. To prevent operation from being started unintentional-
ly, set the start check function to enabled. For details on the start check function, refer to Start Check
Function (When (H96) = "2," "4") on page 7-81.
7-8-5 Thermistor Trip Function
You can provide thermal protection for external equipment such as a motor by connecting a thermistor
installed on it to the inverter and enabling this function.
Parameter No.
H26
H27
E20, E21, E27
Related function
Connect a PTC thermistor between the [PTC] terminal and the [AIC] terminal. If, as a result of the re-
sistance value of the connected PTC thermistor, the internal power supply is divided, and the voltage
between the [PTC] terminal and the [AIC] terminal exceeds 1st Thermistor Error Detection Level
(MOH) (H27), operation set at Thermistor Function Selection (MOH) (H26) is performed. Take thermis-
tor error into consideration when setting the 1st Thermistor Error Detection Level (MOH) (H27). If the
resistance value of a PTC thermistor at the protection temperature is considered as Rp, the operation
level V is calculated by the formula below.
OH
7-88
Function name
0: Disable
1: Inverter immediately trips with OH4 dis-
Thermistor Function Se-
played
lection (MOH)
2: Inverter issues output signal MOH and
continues to run
1st Thermistor Error De- 0.00 to 5.00
tection Level (MOH)
Output Terminal [DO1] 56: MOH (Motor overheat detected by ther-
Function Selection, Out- mistor)
put Terminal [DO2]
Function Selection, Out-
put Terminal [ROA,
ROB] Function Selection
Output Terminal [DO1] ON Delay Time (H309)
Output Terminal [DO2] ON Delay Time (H311)
Output Terminal [ROA, ROB] ON Delay Time (H313)
Output Terminal[DO1] OFF Delay Time (H310)
Output Terminal[DO2] OFF Delay Time (H312)
Output Terminal [ROA, ROB] OFF Delay Time (H314)
Free-run
Data
M1 Series Standard Type User's Manual (I669)
Default
Unit
data
0 -
1.60 V
- -