Preventive maintenance management system and method for generating maintenance schedule of machine, and cell controller

1. A preventive maintenance management system, comprising:

at least one machine;

at least one machine controller which controls the machine;

a cell controller communicably connected to the machine controller; and

a supervisory computer communicably connected to the cell controller,

wherein the cell controller has:

an analyzing part which monitors preventive maintenance data of the machine received from the machine controller at predetermined time intervals, detects a deterioration of a component of the machine associated with the preventive maintenance data, based on the monitored preventive maintenance data, and calculates a residual period of time until the component comes to an end of its life when the deterioration is detected, based on the preventive maintenance data; and

an informing part which informs the supervisory computer of the residual period of time calculated by the analyzing part, along with an alarm which represents that the deterioration is detected,

wherein the supervisory computer has a maintenance scheduling part which generates or updates a maintenance schedule including a replacement operation for the component based on the residual period of time,

wherein the component includes a motor of the machine,

wherein the analyzing part continues to monitor the preventive maintenance data after the deterioration is detected, and recalculates the residual period of time based on the monitored preventive maintenance data,

wherein the informing part informs the supervisory computer of the residual period of time recalculated by the analyzing part,

wherein the maintenance scheduling part updates the maintenance schedule based on the recalculated residual period of time, and

wherein the analyzing part decreases the predetermined time interval at which the preventive maintenance data is monitored after the deterioration is detected, as a rate of change in the preventive maintenance data is increased.

2. A cell controller communicably connected to a machine controller for controlling a machine, the cell controller comprising:

an analyzing part which monitors preventive maintenance data of the machine received from the machine controller at predetermined time intervals, detects a deterioration of a component of the machine associated with the preventive maintenance data, based on the monitored preventive maintenance data, and calculates a residual period of time until the component comes to an end of its life when the deterioration is detected, based on the preventive maintenance data,

an informing part which informs a supervisory computer of the residual period of time calculated by the analyzing part, along with an alarm which represents that the deterioration is detected, the supervisory computer having a maintenance scheduling part which generates or updates a maintenance schedule including a replacement operation for the component based on the residual period of time,

wherein the analyzing part continues to monitor the preventive maintenance data after the deterioration is detected, and recalculates the residual period of time based on the monitored preventive maintenance data,

wherein the informing part informs the supervisory computer of the residual period of time recalculated by the analyzing part, for the maintenance scheduling part to update the maintenance schedule based on the recalculated residual period of time,

wherein the analyzing part decreases the predetermined time interval at which the preventive maintenance data is monitored after the deterioration is detected, as a rate of change in the preventive maintenance data is increased, and

wherein the component includes a motor of the machine.

3. A non-transitory computer readable medium, which stores a program executable by a computer to cause the computer to:

monitor preventive maintenance data of a machine received, at predetermined time intervals, from a machine controller controlling the machine,

detect a deterioration of a component of the machine associated with the preventive maintenance data, based on the monitored preventive maintenance data,

calculate a residual period of time until the component comes to an end of its life when the deterioration is detected, based on the preventive maintenance data,

output, to a supervisory computer communicably connected to the computer, the calculated residual period of time and an alarm which represents that the deterioration is detected, for generating or updating, by the supervisory computer, a maintenance schedule including a replacement operation for the component based on the calculated residual period of time,

continue to monitor the preventive maintenance data after the deterioration is detected,

recalculate the residual period of time based on the monitored preventive maintenance data,

output, to the supervisory computer, the recalculated residual period of time, for updating, by the supervisory computer, the maintenance schedule based on the recalculated residual period of time, and

decrease the predetermined time interval at which the preventive maintenance data is monitored after the deterioration is detected, as a rate of change in the preventive maintenance data is increased,

wherein the component includes a motor of the machine.