Method of logging data in a transport refrigeration unit

Details Method of logging data in a transport refrigeration unit Method of logging data in a transport refrigeration unit

1994-08-22

1995-08-01

Tanner, Harry B.

Refrigeration

With indicator or tester

Operatively correlated with automatic control

62130, 364557, F25B 4902

Patent

active

054371635

ABSTRACT:
A method of logging data relative to the operation of a transport refrigeration unit, during each trip of the transport refrigeration unit, with the transport refrigeration unit including control means and non-volatile memory means. The method includes the steps of monitoring a plurality of predetermined variables of the transport refrigeration unit to provide data, and selecting those variables of the plurality of monitored variables whose data is to be logged in the memory means during a trip of the transport refrigeration unit. The method further includes the steps of dividing the non-volatile memory means into at least first and second data segments for storing data from the selected variables, storing an address pointer in the first data segment which points to an address in the second data segment, for each trip of the transport refrigeration unit, and storing data from the selected variables in the second data segment, during each trip of the transport refrigeration unit. The method also includes the step of downloading data stored in the non-volatile memory means to a predetermined device, using at least one address pointer stored in the first data segment to download associated data stored in the second data segment.

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