Trips & Fault Finding 7-15
AC30 series Variable Speed Inverter
Black Box Feature
The Black Box feature can be used to help find the source of a trip. Data is saved automatically whenever a trip occurs that causes the drive to
stop running. The data records the moments leading up to the trip and the state of the drive when the trip occurs. This may then be transferred to
an SD card for off line analysis.
Black Box File Format
When copied to an SD card, the black box feature creates one file for each trip event, or record. The files are called “blackbox_xxxx.csv” where
xxxx is replaced with a decimal number that is incremented automatically by the drive every time a trip occurs.
The data recorded in the lead up to the trip is:
• Up to four user defined parameters
• Output Current in phases U and V expressed as a percent of motor rating
• The rotor electrical frequency in Hz.
• The demanded electrical frequency in Hz
• The DC Link volts, (parameter 0392 DC Link Voltage)
• The temperature of the control card PCB in centigrade, (parameter 0406 CM Temperature)
• The temperature of the heatsink in centigrade, (parameter 0407 Heatsink Temperature)
• The sequencing control word, (parameter 0644 Control Word)
• The sequencing status word, (parameter 0641 Status Word)
• The input and output digital signals on the stack, words 1 and 2.
• The control card digital output and input latches.
• Various digital inputs to the micro-controller.
• Trip latch state
• Motor sequencer state
• Motor sequencer start and stop states.
• Main sequencer state, (parameter 0678 Sequencing State)
• High current limit activity
• Stall trip torque limit state
• Stall trip current limit state
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