Changing the cursor mode
Before continuing with the worked example, it is necessary to understand the operation of the
cursor control and the various edit modes that are available.
The following text is for illustration purposes only:
While in the ladder edit screen, Right clicking the mouse button pops up a small selection win
-
dow as shown below. Clicking on
Auto Connect
toggles this feature on/off; it is also the method
for switching between pen and arrow, other than via toolbar icons.
Precautions when using the Ladder Editor
As can be seen from the screen below, because
Auto Connect
connects between two points,
for a row of contacts the line tries to connect as shown. With
Auto Connect
on, the only way to
connect these contacts is to connect between each individual pair:
The pen can then strike through all contacts, from the bus bar, to the coil. In the Ladder Editor the
suggestion is to invoke the
Auto Connect
feature when dropping elements onto the POU body
or connecting parallel elements. It should however be disabled when connecting a row of con
-
tacts as shown in the following screen, or inserting a contact into an existing network.
When using multi-legged or ‘pinned’ functions such as MUL, the number of input parameter
legs, can be incremented/decremented by using the special toolbar, icons shown. This can also
be achieved by placing the cursor at the bottom edge of the function, holding down the left hand
mouse button and then dragging away as shown below:
Building a Project Application Program
Training Manual GX IEC Developer 4 - 21
To Next Page
Loading...
