Auto logging of electronic detonators

A detonator logging unit for use in a blasting system comprising a blast machine and a plurality of electronic detonators controlled by the blast machine, wherein each of the plurality of electronic detonators comprises a shell, a control module in the shell, and a pair of leg wires, wherein all of the plurality of electronic detonators are interconnected with the blast machine in a series in a logging circuit, wherein all of the plurality of electronic detonators are interconnected with the blast machine in a blast control circuit, the detonator logging unit comprising:

• a housing;
• a logging module in the housing operatively connectable to the leg wires of one of the plurality of electronic detonators, the logging module configured to execute a detonator logging operation, wherein the detonator logging operation includes accepting an assigned detonator sequence number from the blast machine in response to logging status from the logging module of the detonator logging unit associated with the immediately preceding electronic detonator in the logging circuit and posting logging status for output to the logging module of the detonator logging unit of the immediately succeeding electronic detonator in the logging circuit;
• first and second logging wires having internal ends operatively connected to the logging module and external ends outside of the housing for connecting the logging module to the logging module of the detonator logging unit associated with the immediately preceding electronic detonator in the logging circuit and the logging module of the detonator logging unit associated with the immediately succeeding electronic detonator in the logging circuit;
• and
• first and second blast wires having internal ends operatively connected to the logging module and external ends outside of the housing for connecting the detonator logging unit to the blast control circuit so that the detonator logging unit is interposed between the leg wires of the electronic detonator and the blast circuit.