5.5.3 Network rules for series and parallel in LAD
Rules for placing contacts
Each network must begin with a contact.
The network cannot be terminated by contact.
Rules for placing coils
The network can not start with the coil ； The coil is used to terminate the logical
network.A network may have a number of coils, and the coils are located on a
parallel branch of the network.Could not be connected in series with more than one
coil in the network
Rules for placing blocks
If the block has ENO, the enable bit can be extended to the out of block;This means
that you can place more instructions behind the block.In the network, you can
connect in series with a number of boxes with ENO.If there is no ENO in the box, no
instruction can be placed on the following.
Network size limit
Cell is the area which is placed instruction.In the network, a single network can
extend 32 cells Vertically or 32 cells horizontally.
5.5.4 How to input commands in LAD
Line
You can use horizontal and vertical lines to connect elements to finish the network.
Double click the instruction tree
1.Place the cursor in the position you want to edit in the program editor
window.Click the mouse, there will be a selection box.
2.Select the required instruction, double click it.
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