Fluid delivery device and methods of its operation

摘要

A method (1000) of maintaining a fluid delivery logbook on a dispensing unit of a fluid delivery device, comprising: generating (1002), at a beginning of a current communication cycle, a dispensing unit status message; adding (1006) unacknowledged logbook entries to the dispensing unit status message if a logbook comprises entries that have not been acknowledged by a command means paired to the dispensing unit; sending (1010) the dispensing unit status message to the command means; recording (1014) receipt of the logbook entries in the dispensing unit status message if an acknowledgment message is received from the command means; and waiting (1016) for a next communication cycle.