7 | Commissioning
18 | 44
Instruction Manual MINK MB 0018 A_EN_en
CAN Status Message (Actual Values)
One second after startup, the machine sends every 50 ms a CAN status message with actual values.
If the machine receives a CAN control message before the first second after startup the machine
sends the CAN status message immediately.
Power-On Bit
After startup a power-on bit is set in the CAN status frame for one second. The power-on bit can be
used to identify unexpected resets/restarts.
Loss of CAN Communication
If a loss of CAN communication occurs the reference value for mass flow will be set to 100 g/min. A
loss of CAN communication will be detected if no valid CAN control message have been received for
500 ms. As soon as the CAN communication is available again the machine switches to normal oper-
ation immediately.
Speed reduction by temperature
The maximum speed of the machine depends on the electronic temperature to ensure safe opera-
tion of the machine at any temperatures.
The machine will reduce the speed if the electronic temperature is too high even if the reference
speed value is higher than the actual speed. The speed reduction resulted from the electronic tem-
perature is indicated by the sixth bit in the CAN status frame. There will be no indication on the sixth
bit if the actual speed limited by the electronic temperature complies with the maximum speed.
Loss of air mass flow sensor
At loss of the air mass flow sensor, the software switches automatically into the speed control mode
with the predefined speed pre-control value.
Without or in case of loss of air mass flow sensor, the actual air temperature (given by the CAN Actu-
al Values) is 214°C by default.
The loss of air mass flow sensor is visible in the CAN Status bit (see CAN Protocol). This failure is au-
tomatically reset as soon as new values are received from the air mass flow sensor. Without air mass
flow sensor, the bit 2 of the diagnostics is automatically set to 1.
Over current protection
The electronics is protected against a blocked rotor or overload by an overcurrent protection. If an
overcurrent is detected the motor stops immediately. The bit 7 “overcurrent” in the CAN Status
frame is set for about 2 seconds.
One second after the stop of the motor the electronic tries to restart the motor automatically. If the
overcurrent error occurs one more time, the motor stops again and the error bit in the can status
frame stays on.
