Lenze 9300 Servo PLC - 2.13.13.10 Heatsink monitoring OH4 (adjustable); 2.13.13.11 Heatsink monitoring OH (fixed)

9300 Servo PLC
System blocks
2.13 Internal motor control (MCTRL_MotorControl)
2-63
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9300ServoPLC EN 1.4
2.13.13.10 Heatsink monitoring OH4 (adjustable)
(MCTRL_bKuehlGreaterC0122_b)
Purpose
Controller protection
This monitoring is designed as a warning before the disconnection of the controller via the OH-TRIP.
Thus, the process can be influenced to avoid a switch-off of the controller at an inconvenient time.
Additionally, blowers which would causean unacceptablenoise incontinuous operation, can also be
switched on and off.
Function
MCTRL_bKuehlGreaterC0122_b is derived from a comparator with hysteresis. The threshold can be
set under code C0122. The hysteresis is fixed and amounts to 5 K. The signal is thus reset below a
threshold of 5 K.
Features:
• LECOM no.: 2054
• Reaction: WARNING or OFF
2.13.13.11 Heatsink monitoring OH (fixed)
(MCTRL_bKuehlGreaterSetValue_b)
Purpose
Controller protection
Function
MCTRL_bKuehlGreaterSetValue_b is derived from a comparator with hysteresis. The switch-off
thresholdis85°C and is fixed. Thehysteresis is also fixed and amountsto 5 °C,i.e. the reclosing point
is 80 °C.
Features:
• LECOM no.: 50
• Reaction: TRIP (cannot be modified)
Tripping can have the following causes:
• The ambient temperature is too high.
Remedy:
– Install a blower into the switch cabinet.
• The controller is overloaded in its arithmetic mean, i.e. overload and recovery phase exceed
100 %.
Remedy:
– Shorten overload phase.
–useamorepowerfuldrivecontroller.
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