Sunday, November 8, 2009

Heater Controller with PLC




Diagram of Heating Process
Diagram of heating process

See : Wiring Heater

Number Of Inputs and Output PLC applied :
1. Number Of Inputs PLC is 3 Input :
--- 1 Unit Input for Swicth for Heater ON - OFF.
--- 1 Unit Input for Temperature is Reached from NO Contact Contactor.
--- 1 Unit Input for Alarm Heater from Alarm Heater Element Bournout Detector.
--- Total Number Of Inputs PLC is Minimum 3 Input Unit.

2. Number Of Output PLC is 3 Output :
--- 1 Unit Output for Heater ON / OFF to Power Temperature Controller .
--- 1 Unit Output for Alarm Heater Lamp ( RED Lamp ).
--- 1 Unit Output for Temperature is Reached Lamp ( GREEN Lamp ).
--- Total Number Of Outputs PLC is Minimum 3 Output Unit.


Sequence PLC Programming for Heater controller with PLC :

Step 1 : Check Alarm Heater
a. If Swicth for Heater = ON Then Power Temperature Controller = ON.
b. If NO Contact Contactor = ON And Power Temperature Controller = ON Then Timer Alarm Activated.
c. Data Set Value Timer Alarm = 2 Second ( Data Setting = 2 second (Can be Changed) ) for Stability Current from Power to Heater.
d. If Timer Alarm = ON And Alarm Heater = OFF ( NO Alarm is ON And Alarm is OFF ) Then Alarm Heater Lamp = ON And Power Temperature Controller = OFF ( Hold OFF Until Swicth for Heater = OFF ).
e. If Swicth for Heater = OFF Then Power Temperature Controller = OFF.
Step 2 : Temperature is Reached
a. If NO Contact Contactor = ON (Hold ON by Heating Pocess ) And Power Temperature Controller = ON And Swicth for Heater = ON And Alarm Heater Lamp = OFF Then Heating Pocess = ON.
c. If NO Contact Contactor = ON to OFF And Heating Pocess = ON Then Temperature is Reached Lamp = ON ( Hold ON ).
d. If Power Temperature Controller = OFF Or Swicth for Heater = OFF Or Alarm Heater Lamp = ON Then Temperature is Reached Lamp = OFF.


Can You make Program Ladder PLC ?

If Can't :

PLC Omron Programming for Heater Controller

PLC Mitsubishi Programming for Heater Controller

PLC Keyence Programming for Heater Controller


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