$5.$ Develop ladder logic for the coal handling process. Using PLC Programmble logic controller

Process:

The coal plant consist of the following main equipment

Storage tank: It stores coal in a huge amount $\backslash$& supplies it to the primary crusher as per requirement.

Primary crusher: It crushes the coal from a bigger size to smaller size $\backslash$& supplies it to secondary crusher.

Secondary crusher: Two crushers are used to decrease a load of crushing $.$secondary crusher crushes the small$-$sized crushed coal coming from the primary crusher to powdered form.

Coal mill: This is a mixture that mixes coal powder coming from secondary with hot air coming from air pre$-$heater $\backslash$& forced it into the furnace.

Sequence:

a$.$ When we press START, it starts motor M$1\backslash$& opens the C$1$ which passes coal from storage tank to primary crusher.

b$.$ When level ML$1,$ reaches $0$: $\backslash (0/1\backslash )$ wills ON$,$ it starts motor M$2\backslash$& M$3,$ which crushes coal in small part $\backslash$& pass to the secondary crusher.

c$.$ When level ML$2$ reaches O: $\backslash (0/2\backslash )$ wills ON$,$ it starts coal mill, starting motors M$4,$ M$5,$ M$6\backslash$& M$7.$