Patent ID: 8215734

Claim:
A liquid consuming system comprising: a liquid consuming apparatus; and a liquid supply unit detachably installable in the liquid consuming apparatus, wherein the liquid supply unit includes: a receptacle containing a liquid; a memory device having a first memory area for storing first liquid information for use in identifying a remaining amount of the liquid contained in the receptacle; a sensor that is used to detect whether the remaining amount of the liquid contained in the receptacle is equal to or less than a prescribed value; and a memory control section that carries out write-prohibition control whereby writing to the first memory area in the memory device is prohibited in response to a write lock command from the liquid consuming apparatus, and the liquid consuming apparatus includes: a liquid consuming section that consumes the liquid contained in the receptacle; a liquid information update section that updates the first liquid information stored in the first memory area, in accordance with consumption of the liquid in the liquid consuming section; a determination section that determines whether the remaining amount of the liquid is equal to or less than a prescribed value using an output of the sensor; and a write lock command issuing section that issues the write lock command to the memory control section if the determination section determines that the remaining amount of the liquid is equal to or less than the prescribed value.