Creating Ladder Programs; Operation - Omron CP1E - INTRODUCTION Introduction Manual

4-2 Creating Ladder Programs

A ladder program can now be created for the example introduced in SECTION 2 System Design. First,
however, the functions of the ladder program will be described.

4-2-1 Operation

The ladder program to be created will open and close a garage shutter.
For details on the example application, refer to 2-2-1 Operation.
Entering the Garage
The component functions and operations will be defined in detail below.
(1) Push-buttons (A16-series, etc):
• The shutter can be opened, closed, and stopped with buttons.
• The OPEN and CLOSE buttons will continue operating the shutter even when
(2) Limit switches (WL/WLM-series, etc):
• When the shutter is fully opened or fully closed, it will be stopped by a limit
• When the shutter is opening, the de-escalation motor will be interlocked to
(3) Light detection sensor:
• A light detection sensor detects light from headlights pointed at the garage.
• After the first headlight flash, a timer is activated by a timer instruction. After 5
• The present value of the counter instruction is retained even when CP1L is
2
2
they are not held down. A self-maintaining bit is used to achieve this.
switch.
prevent damage.
When 3 headlight flashes are detected by a counter instruction, the shutter
escalation motor is activated.
seconds, a reset command is given to the counter instruction.
powered OFF. To prevent malfunction, a reset command is given to the
counter instruction when CP1L is powered ON.

4-2 Creating Ladder Programs

1
3
SYSMAC CP1L/CP1E Introduction Manual
4
4
45