
//INTEGRAS/ELS/PAGINATION/ELSEVIER UK/PLC/3B2/FINALS-7-6-04/0750656794-CH007.3D – 81 – [71–90/20] 19.6.2004
9:08PM
Ladder diagram ^ LATCH1
Principle of operation ^ LATCH1
1. Enter, test and save the project Latch1.
2. Download the project to the FX2N PLC.
3. Ensure the project is working correctly using the inputs X0, X1 and X2.
4. Line 0
Input X0 operates M0, which then latches via its own contact and also energises
Output Y0.
5. Line 6
Input X1 operates M500, which then latches via its own contact and also energi ses
Output Y1.
6. Reset
Opening Input X2 resets both latch circuits, provided Inputs X0 and X1 are OFF.
7. With Input X2 ON, momentarily operate ...