9300 Servo PLC
System blocks
2.13 Internal motor control (MCTRL_MotorControl)
2-61
9300ServoPLC EN 1.4
2.13.13.7 PTCOverTemp (motor-temperature monitoring OH8)
• This function protects the motor.
• The message is triggered by
MCTRL_bPTCOverTemp_b
=TRUE.
Function
The signal PTCOverTemp is derived from the digital signal via the terminalsT1, T2 next to the power
terminals UVW. The threshold and the hysteresis depend on the encoder system (DIN44081).
Stop!
When using this input as a motor protection: If the monitoring is set to WARNING or OFF, the motor
can be destroyed by any further overload.
Features:
• LECOM no.: 58, 2058
• Reaction: TRIP, WARNING or OFF
2.13.13.8 Overcurrent diagram for fault signal OC5
(MCTRL_bIxtOverload)
200%
150%
100%
70%
10s
60s
120s
180s
time
Controller output current *
Ixt diagram
(100% load)
for Imotor
$
150 I
ratedx
70% thermal continuous current
for Imotor
150% I
ratedx
* rated controller current 100%
x depending on the chopping frequency of the inverter
100% thermal continuous current
K35.0151
Abb. 2-31 Max. permitted overcurrent depending on the time
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