A part feeder is placing parts on a conveyor. The feeder has a status light that will be tied into the plc to use the systems buzzer, along with the hardware below.
Hardware is AB micrologix 1500 w/ memory module for real time clock., 1optical sensor,1reset pushbutton,1buzzer,and 3 lights (red,yellow,green),and a laptop computer for data logging, and 2 additional dry contact imputs. see #4.
1. Power up PLC and green light comes on (system on light).
2. A part on the conveyor belt is seen with the optical sensor starting the timer.
3. a.if sensor sees another part after 7min.a yellow light comes on & buzzer sounds 1x.
b.if sensor sees another part within 3 more minutes ( <10min.total ) yellow light will resets itself.
c.if sensor dosen't see a part within 3 minutes(>10+min.) red light goes on & buzzer sounds 2x.
d.system then will need to be reset with pushbutton by operator.
4.A Buzzer will sound ,when a light on the machine that puts the parts on the conveyor belt, comes on. Condition a. 3x Condition b. 4x.
5. Data log 3a.,3c.,and 4a. and 4b. conditions with a time stamp.