To turn on the PLC in manual, keep mixer gate and plant in auto and press the both switch (mixer gate open and Mixer gate close) together. PLC will be on.
Aap ki bat pasand aaya ki vistar se bataye pr ek chij ki jarurat hai ki plant oparetor ko kya jnkari honi chaiye or plant ko kaise banaye agr achhi lagi hai to video jarur banaye ga bhai ji