Mitsubishi Electric FX2N-32CAN, Training Manual

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6.2
Creating a Function Block
Objective:
Build a Function Block to act as a Star/Delta Starter. Declare the following variables:
– Start Pushbutton: START
– Stop Pushbutton: STOP
– Overload Contact: OVERLOAD
– Switchover Time: TIMEBASE
– Time Register: TIME_COIL
– Star Contactor Output: STAR_COIL
– Delta Contactor Output: DELTA_COIL
Name the Function Block STAR_DELTA.
Procedure:
햲
Start a new “Empty” project in GX IEC Developer called “ Motor Control ” with no POU’s.
STAR_DELTA will now have appeared on the POU tree.
햴
Click once to open the Header and Body branches.
햵
Double click, to open the Header.
Declaring Local Variables
햲
Declare variables as shown below.
햳
Check, save and then close the Header window.
6 - 14 MITSUBISHI ELECTRIC
Functions and Function Blocks Creating a Function Block
햳
Create a new POU named “STAR_DELTA”
of Class "Function Block" ( FB ) with a language
Body type
Ladder Diagram
.