A Hybrid Process Monitoring and Fault Diagnosis Approach for Chemical Plants

Table 2

Fault mode versus the output code in WNN.

Number	Deviation/fault mode description	Binary ASCII code
1	Higher feed temperature of the depropanizer	0 0 0 0 0 1
2	No overhead reflux flow in the depropanizer	0 0 0 0 1 0
3	No flow of overhead product to the deethanizer	0 0 0 0 1 1
4	Lower temperature of sensitive tray in the depropanizer	0 0 0 1 0 0
5	Higher liquid level in the bottom of the depropanizer	0 0 0 1 0 1
6	Lower liquid level in the bottom of the depropanizer	0 0 0 1 1 0